Commit Graph

2803 Commits

Author SHA1 Message Date
Nobuhiro Iwamatsu
65d5665bb2 spi: sh-msiof: Update calculation of frequency dividing
sh-msiof of frequency dividing does not perform the calculation, driver have
to manage setting value in the table. It is not possible to set frequency
dividing value close to the actual data in this way. This changes from
frequency dividing of table management to setting by calculation.
This driver is able to set a value close to the actual data.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-02-02 20:03:39 +00:00
Ian Abbott
7782a1a948 spi: spidev: Convert buf pointers for 32-bit compat SPI_IOC_MESSAGE(n)
The SPI_IOC_MESSAGE(n) ioctl commands' argument points to an array of n
struct spi_ioc_transfer elements.  The spidev's compat_ioctl handler
just converts this pointer and passes it on to the unlocked_ioctl
handler to process it.

The tx_buf and rx_buf members of struct spi_ioc_transfer are of type
__u64 and hold pointer values.  A 32-bit userspace application running
in a 64-bit kernel might not have widened the 32-bit pointers correctly
for the kernel.  The application might have sign-extended the pointer to
when the kernel expects it to be zero-extended, or vice versa, leading
to an -EFAULT being returned by spidev_message() if the widened pointer
is invalid.

Handle the SPI_IOC_MESSAGE(n) ioctl commands specially in the
compat_ioctl handler, calling new function spidev_compat_ioctl_message()
to handle them.  This processes them in the same way as the
unlocked_ioctl handler except that it uses compat_ptr() to convert the
tx_buf and rx_buf members of each struct spi_ioc_transfer element.

To save code, factor out part of the unlocked_ioctl handler into a new
function spidev_get_ioc_message().  This checks the ioctl command code
is a valid SPI_IOC_MESSAGE(n), determines n and copies the array of n
struct spi_ioc_transfer elements from userspace into dynamically
allocated memory, returning either a pointer to the memory, an
ERR_PTR(-err) value, or NULL (for SPI_IOC_MESSAGE(0)).

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-02-02 19:57:19 +00:00
Ricardo Ribalda Delgado
34093cb97a spi/xilinx: Fix access invalid memory on xilinx_spi_tx
On 1 and 2 bytes per word, the transfer of the 3 last bytes will access
memory outside tx_ptr.

Although this has not trigger any error on real hardware, we should
better fix this.

Fixes: 24ba5e593f (Remove rx_fn and tx_fn pointer)
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-02-02 12:17:19 +00:00
Mark Brown
0635287a30 spi: Revert "spi/xilinx: Remove iowrite/ioread wrappers"
This reverts commit 99082eab63 since it
breaks the build due to differing implementations of iowrite() and
ioread().

Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-30 13:42:00 +01:00
Ricardo Ribalda
eb25f16c6f spi/xilinx: Check number of slaves range
The core only supports up to 32 slaves, and the chipselect function
expects the same.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:57:32 +00:00
Ricardo Ribalda Delgado
22417352f6 spi/xilinx: Use polling mode on small transfers
Small transfers generally can be accomplished faster in polling mode.
This patch select the transfer which size is bellow the buffer size to
be done on polling mode

Suggested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:43 +00:00
Ricardo Ribalda Delgado
b563bfb8d7 spi/xilinx: Remove remaining_words driver data variable
The variable never leaves the scope of txrx_bufs.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:43 +00:00
Ricardo Ribalda Delgado
99082eab63 spi/xilinx: Remove iowrite/ioread wrappers
Save a stack level and cleanup code.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:43 +00:00
Ricardo Ribalda Delgado
17aaaa8032 spi/xilinx: Convert bits_per_word in bytes_per_word
Simplify the code by using the unit used on most of the code logic.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:43 +00:00
Ricardo Ribalda Delgado
d79b2d073a spi/xilinx: Convert remainding_bytes in remaining words
Simplify the code by using the unit used on most of the code logic.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:43 +00:00
Ricardo Ribalda Delgado
c30929415a spi/xilinx: Make spi_tx and spi_rx simmetric
spi_rx handles the case where the buffer is null. Nevertheless spi_tx
did not handle it, and was handled by the caller function.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:43 +00:00
Ricardo Ribalda Delgado
24ba5e593f spi/xilinx: Remove rx_fn and tx_fn pointer
Simplify the code by removing the tx and and rx function pointers and
substitute them by a single function.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
f9c6ef6cfe spi/xilinx: Support for spi mode CS_HIGH
The core controls the chip select lines individually.

By default, all the lines are consider active_low. After
spi_setup_transfer, it has its real value.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
d9f5881242 spi/xilinx: Do not inhibit transmission in polling mode
When no irq is used, there is no need to inhibit the transmission for
every transaction. This inhibition was implemented to avoid a race
condition with the irq handler.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
5fe11cc09c spi/xilinx: Support cores with no interrupt
The core can run in polling mode. In fact, the performance of the core
is similar (or even better), due to the fact most of the spi
transactions are just a couple of bytes and there is one irq per
transactions.

When an mtd device is connected via spi, reading 8MB of data produces
more than 80K interrupts (with irq disabling, context swith....)

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
5b74d7a3b8 spi/xilinx: Use cached value of register
The control register has not changed since the previous access.
Therefore we can use the cached value and safe one bus access.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
a87cbca0ac spi/xilinx: Code cleanup
On the transmission loop, check for remaining bytes at the loop
condition.

This way we can handle transmissions of 0 bytes and clean the code.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
899929baba spi/xilinx: Leave the IRQ always enabled.
Instead of enabling the IRQ and disabling it for every transaction.

Specially the small transactions (1,2 words) benefit from removing 3 bus
accesses.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Ricardo Ribalda Delgado
4c9a761402 spi/xilinx: Simplify spi_fill_tx_fifo
Instead of checking the TX_FULL flag for every transaction, find out the
size of the buffer at probe time and use it.

To avoid situations where the core had some data on the buffer before
initialization, the core is reseted before the buffer size is detected

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:42:42 +00:00
Chao Fu
9298bc7273 spi: spi-fsl-dspi: Remove spi-bitbang
DSPI module need cs change information in
a spi transfer. According to cs change, DSPI
will give last data the right flag. Bitbang
provide cs change behind the last data in
a transfer. So DSPI can not deal the last
data in every transfer properly, so remove
the bitbang in the driver.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 19:25:17 +00:00
Arnd Bergmann
75d30c51f8 spi: pl08x: do not select S3C64XX_PL080
The pl08x driver originally selected S3C64XX_PL080 to avoid having
the legacy Samsung DMA interfaces. Those are now gone, so the
select is no longer needed, but it now causes problems when
CONFIG_DMA_ENGINE is disabled:

arch/arm/plat-samsung/built-in.o: In function `s3c64xx_spi0_set_platdata':
:(.init.text+0x518): undefined reference to `pl08x_filter_id'

This simply removes the 'select' to avoid this problem.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 17:37:16 +00:00
Arnd Bergmann
97cf56697a spi/rockchip: avoid uninitialized-use warning
We currently get a warning about potentially uninitialized variables
in the rockchip spi driver, at least in certain toolchain versions:

spi/spi-rockchip.c: In function 'rockchip_spi_prepare_dma':
include/linux/dmaengine.h:796:2: warning: 'txdesc' may be used uninitialized in this function
include/linux/dmaengine.h:796:2: warning: 'rxdesc' may be used uninitialized in this function

The reason seems to be that gcc cannot know whether the value
of the rs->rx and rs->tx variables change between the two points
these are accessed.

The code is actually correct, but to make this clearer to the
compiler, this changes the conditionals to test for the local
rxdesc/txdesc variables instead, which it knows won't change.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 17:36:37 +00:00
Jarkko Nikula
48421adfe7 spi: pxa2xx: Fix unconditional call of lpss_ssp_setup in pxa2xx_spi_resume
Commit 7566bcc76b ("spi: pxa2xx: Move is_lpss_ssp() tests to caller") did
not check LPSS before calling lpss_ssp_setup() in pxa2xx_spi_resume().

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-28 11:24:47 +00:00
Bhuvanchandra DV
973fbce69e spi: spi-fsl-dspi: Remove usage of devm_kzalloc
devm_* API was supposed to be used only in probe function call.
Memory is allocated at 'probe' and free automatically at 'remove'.
Usage of devm_* functions outside probe sometimes leads to memory leak.
Avoid using devm_kzalloc in dspi_setup_transfer and use kzalloc instead.
Also add the dspi_cleanup function to free the controller data upon
cleanup.

Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-01-27 19:52:02 +00:00
Ricardo Ribalda Delgado
c5d348dffa spi/xilinx: Simplify data read from the Rx FIFO
The number of words in the read buffer will be exactly the same as the
number of words written on write buffer, once the transaction has
finished.

Instead of cheking the rx_empty flags for every word simply save the
number of words written by fill_tx_fifo.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-27 17:25:34 +00:00
Andy Shevchenko
d9c14743a3 spi: dw-mid: get a proper clock frequency for SPI2
The clock information is being kept in the custom register on Intel MID
platforms. Each controller has its own dedicated custom register for that.
Thus, to get a proper frequency we have to read value from the specific offset
to the register block. This patch makes this happen.

Fixes: d58cf5ff65 (spi: dw-pci: describe Intel MID controllers better)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-27 12:04:29 +00:00
Ricardo Ribalda Delgado
0240f94516 spi/xilinx: Support for spi mode LOOP
Hardware supports LOOP mode. Support it also in the driver.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-26 19:23:35 +00:00
Ricardo Ribalda Delgado
bca690db90 spi/xilinx: Support for spi mode LSB_FIRST
Hardware supports LSB_FIRST mode. Support it also in the driver.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-26 19:23:35 +00:00
Mark Brown
06a5687f82 Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/msiof' and 'spi/fix/pxa2xx' into spi-linus 2015-01-26 11:16:27 +00:00
Michal Simek
78d97a5736 spi: Kconfig: Remove additional newline
Trivial fix.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-16 16:30:55 +00:00
Ken Wilson
23244404e2 spi: orion: Add multiple chip select support to spi-orion
This commit adds support for multiple hardware chip selects to spi-orion.
Different SoCs support different number of chip selects (up to
8 on some platforms). The driver allows up to this number, and it is up
to the implementer to only use the chip selects that are available.

Signed-off-by: Ken Wilson <ken.wilson@opengear.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-16 12:38:54 +00:00
Axel Lin
b85bfc444c spi: st-ssc4: Remove duplicate code to test unsupported mode bits
spi_setup() will test unsupported mode bits before calling spi->master->setup.
Thus remove duplicate code to test unsupported mode bits in spi_st_setup().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-14 19:16:56 +00:00
Ken Wilson
75872ebe96 spi: orion: Change spi-orion to use transfer_one() semantics for SPI transfers
This commit changes spi-orion to provide setup, set_cs, and transfer_one
functions instead of transfer_one_message. This allows chip select support
for both native and GPIO chip selects to be added.

Signed-off-by: Ken Wilson <ken.wilson@opengear.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-14 17:21:55 +00:00
Andy Shevchenko
d58cf5ff65 spi: dw-pci: describe Intel MID controllers better
There are more that one SPI controller on the Intel MID boards. This patch
describes the status and IDs of them. From now on we also have to care about
bus number that must be unique per host.

According to the specification the SPI1 has 5 bits for chip selects and SPI2
only 2 bits. The patch makes it depend to PCI ID.

The first controller (SPI1) is DMA capable, meanwhile SPI2 can share same
channels (via software switch) such functionality is not in the scope of this
patch. Thus, attempt to init DMA for SPI2 will always fail for now.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-07 18:01:06 +00:00
Andy Shevchenko
30b4b703a5 spi: dw: print debug message with FIFO size
When autodetection is used it would be useful to know what the FIFO size is.
The patch adds a debug message for this purpose.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-07 18:01:06 +00:00
Andy Shevchenko
3dbb3b98e8 spi: dw: amend warning message
In case of warning message in ->probe() we have to use HW device name instead
of master because last is not defined yet.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-07 17:58:54 +00:00
Geert Uytterhoeven
c8935ef0f2 spi: sh-msiof: Use async pm_runtime_put() in sh_msiof_spi_setup()
There's no need to use the synchronous version.

Reported-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-07 17:30:25 +00:00
Mark Brown
1285c3fefa Linux 3.19-rc3
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Merge tag 'v3.19-rc3' into spi-sh-msiof

Linux 3.19-rc3
2015-01-07 17:30:17 +00:00
Christoph Jaeger
6341e62b21 kconfig: use bool instead of boolean for type definition attributes
Support for keyword 'boolean' will be dropped later on.

No functional change.

Reference: http://lkml.kernel.org/r/cover.1418003065.git.cj@linux.com
Signed-off-by: Christoph Jaeger <cj@linux.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
2015-01-07 13:08:04 +01:00
Barry Song
29104c748d spi: sirf: drop redundant sirf,marco-spi compatible string
"sirf,marco-spi" is redundant as all SPI controllers in CSR SiRFSoC are
compatible with prima2-spi.
at the same time, the whole marco project was dropped and its replacement
atlas7 is also compatible with prima2 in SPI.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-06 17:38:59 +00:00
Esben Haabendal
38455d7ac2 spi: fsl-(e)spi: Support compile as module
Signed-off-by: Esben Haabendal <eha@deif.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-06 17:03:34 +00:00
Laurentiu Palcu
2b5e368e41 spi/dln2: simplify return flow for dln2_spi_transfer_setup and dln2_spi_enable
This fixes the following kbuild test robot warnings:

>> drivers/spi/spi-dln2.c:124:1-4: WARNING: end returns can be simplified if negative or 0 value
>> drivers/spi/spi-dln2.c:656:1-4: WARNING: end returns can be simplified if negative or 0 value

Additionally, fix a comment after switching from CONFIG_PM_RUNTIME to
CONFIG_PM.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-06 17:02:50 +00:00
Mark Brown
6b038c8d2b Merge remote-tracking branch 'spi/fix/msiof' into spi-sh-msiof
Conflicts:
	drivers/spi/spi-sh-msiof.c
2015-01-06 11:06:46 +00:00
Yoshihiro Shimoda
6d40530e47 spi: sh-msiof: fix MDR1_FLD_MASK value
Since the FLD bit field is bit[3:2], the MDR1_FLD_MASK value should
be 0x0000000c.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-06 11:04:33 +00:00
Andy Shevchenko
67bf9cda4b spi: dw-mid: fix FIFO size
The FIFO size is 40 accordingly to the specifications, but this means 0x40,
i.e. 64 bytes. This patch fixes the typo and enables FIFO size autodetection
for Intel MID devices.

Fixes: 7063c0d942 (spi/dw_spi: add DMA support)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-01-05 20:21:40 +00:00
Krzysztof Kozlowski
9caf5067b9 spi: meson: Constify struct regmap_config
The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-05 20:11:32 +00:00
Axel Lin
d297933cc7 spi: dw: Fix detecting FIFO depth
Current code tries to find the highest valid fifo depth by checking the value
it wrote to DW_SPI_TXFLTR. There are a few problems in current code:
1) There is an off-by-one in dws->fifo_len setting because it assumes the latest
   register write fails so the latest valid value should be fifo - 1.
2) We know the depth could be from 2 to 256 from HW spec, so it is not necessary
   to test fifo == 257. In the case fifo is 257, it means the latest valid
   setting is fifo = 256. So after the for loop iteration, we should check
   fifo == 2 case instead of fifo == 257 if detecting the FIFO depth fails.
This patch fixes above issues.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-and-tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-01-05 19:04:39 +00:00
Nizam Haider
650705cf73 spi/gpio: fixed space coding style issue
fixed a coding style issue

Signed-off-by: Nizam Haider <nizamhaider786@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-01-05 18:32:35 +00:00
Fabio Estevam
4b5d6aadce spi: spi-imx: Do not store the irq number in the private structure
The irq number is only used inside the probe function, so there is really no
need to store it in the private structure.

Use a local 'irq' variable to hold the the irq number instead.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-30 11:25:06 +00:00
Ivan T. Ivanov
0667dd5f6c spi: qup: Add SPI_CPOL configuration support
Device support SPI_CPOL, but driver have missed to add
support for this configuration.

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-29 17:14:21 +00:00
Mika Westerberg
c957e8f084 spi/pxa2xx: Clear cur_chip pointer before starting next message
Once the current message is finished, the driver notifies SPI core about
this by calling spi_finalize_current_message(). This function queues next
message to be transferred. If there are more messages in the queue, it is
possible that the driver is asked to transfer the next message at this
point.

When spi_finalize_current_message() returns the driver clears the
drv_data->cur_chip pointer to NULL. The problem is that if the driver
already started the next message clearing drv_data->cur_chip will cause
NULL pointer dereference which crashes the kernel like:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000048
 IP: [<ffffffffa0022bc8>] cs_deassert+0x18/0x70 [spi_pxa2xx_platform]
 PGD 78bb8067 PUD 37712067 PMD 0
 Oops: 0000 [#1] SMP
 Modules linked in:
 CPU: 1 PID: 11 Comm: ksoftirqd/1 Tainted: G           O   3.18.0-rc4-mjo #5
 Hardware name: Intel Corp. VALLEYVIEW B3 PLATFORM/NOTEBOOK, BIOS MNW2CRB1.X64.0071.R30.1408131301 08/13/2014
 task: ffff880077f9f290 ti: ffff88007a820000 task.ti: ffff88007a820000
 RIP: 0010:[<ffffffffa0022bc8>]  [<ffffffffa0022bc8>] cs_deassert+0x18/0x70 [spi_pxa2xx_platform]
 RSP: 0018:ffff88007a823d08  EFLAGS: 00010202
 RAX: 0000000000000008 RBX: ffff8800379a4430 RCX: 0000000000000026
 RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff8800379a4430
 RBP: ffff88007a823d18 R08: 00000000ffffffff R09: 000000007a9bc65a
 R10: 000000000000028f R11: 0000000000000005 R12: ffff880070123e98
 R13: ffff880070123de8 R14: 0000000000000100 R15: ffffc90004888000
 FS:  0000000000000000(0000) GS:ffff880079a80000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 0000000000000048 CR3: 000000007029b000 CR4: 00000000001007e0
 Stack:
  ffff88007a823d58 ffff8800379a4430 ffff88007a823d48 ffffffffa0022c89
  0000000000000000 ffff8800379a4430 0000000000000000 0000000000000006
  ffff88007a823da8 ffffffffa0023be0 ffff88007a823dd8 ffffffff81076204
 Call Trace:
  [<ffffffffa0022c89>] giveback+0x69/0xa0 [spi_pxa2xx_platform]
  [<ffffffffa0023be0>] pump_transfers+0x710/0x740 [spi_pxa2xx_platform]
  [<ffffffff81076204>] ? pick_next_task_fair+0x744/0x830
  [<ffffffff81049679>] tasklet_action+0xa9/0xe0
  [<ffffffff81049a0e>] __do_softirq+0xee/0x280
  [<ffffffff81049bc0>] run_ksoftirqd+0x20/0x40
  [<ffffffff810646df>] smpboot_thread_fn+0xff/0x1b0
  [<ffffffff810645e0>] ? SyS_setgroups+0x150/0x150
  [<ffffffff81060f9d>] kthread+0xcd/0xf0
  [<ffffffff81060ed0>] ? kthread_create_on_node+0x180/0x180
  [<ffffffff8187a82c>] ret_from_fork+0x7c/0xb0

Fix this by clearing drv_data->cur_chip before we call spi_finalize_current_message().

Reported-by: Martin Oldfield <m@mjoldfield.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-12-29 16:13:35 +00:00
Mark Brown
ee4629f5b2 Merge remote-tracking branches 'spi/fix/img-spfi' and 'spi/fix/msiof' into spi-linus 2014-12-24 12:57:54 +00:00
Yoshihiro Shimoda
3110628d89 spi: sh-msiof: Configure MSIOF sync signal timing in device tree
The MSIOF controller has DTDL and SYNCDL in SITMDR1 register. So,
this patch adds new properties like the following commit:
  d0fb47a523
  (spi: fsl-espi: Configure FSL eSPI CSBEF and CSAFT)

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-24 12:31:17 +00:00
Andrew Bresticker
549858ce76 spi: img-spfi: Select FIFO based on transfer length
Since the 32-bit FIFO is deeper (64 bytes) than the 8-bit FIFO (16 bytes),
use the 32-bit FIFO when there are at least 32 bits remaining to be
transferred in PIO mode or when the transfer length is 32-bit aligned
in DMA mode.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-24 12:20:22 +00:00
Andrew Bresticker
76fe5e95fa spi: img-spfi: Increase DMA burst size
A 1-byte burst size is rather inefficient and has been shown to cause
TX issues during testing.  Increase the DMA burst size to 4-bytes for
both RX and TX DMA when using the 8-bit FIFO.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-24 12:20:03 +00:00
Nicholas Mc Guire
1004b9f146 spi/fsl: unnecessary double init_completion removed
The double call to init_completion(&mpc8xxx_spi->done); is not needed
presumably this is a editing mistake only.

Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-24 11:57:53 +00:00
Mark Brown
b2e5dda14f spi/dln2: Fix for PM_RUNTIME removal
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-23 00:27:41 +00:00
Jarkko Nikula
c039dd275e spi: pxa2xx: Cleanup register access macros
Currently SSP registers are accessed by having an own read and write macros
for each register. For instance read_SSSR(iobase) and write_SSSR(iobase).

In my opinion this hurts readability and requires new macros to be defined
for each new added register. Let's define and use instead common
pxa2xx_spi_read() and pxa2xx_spi_write() accessors.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 20:17:23 +00:00
Jarkko Nikula
8e8dd9fb25 spi: pxa2xx: Pass driver data instead of ioaddr to wait_ssp_rx_stall()
Pass pointer to struct driver_data instead of ioaddr to wait_ssp_rx_stall()
for preparing to register access macro cleanup.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 20:17:23 +00:00
Jarkko Nikula
7566bcc76b spi: pxa2xx: Move is_lpss_ssp() tests to caller
Move is_lpss_ssp() tests from functions to caller. Although this aims to
improve readability it also saves a few code bytes on x86.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 20:17:23 +00:00
Jarkko Nikula
2db73d4482 spi: pxa2xx: Remove unused define
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 20:17:22 +00:00
Laurentiu Palcu
3d8c0d749d spi: add support for DLN-2 USB-SPI adapter
This adds support for Diolan DLN2 USB-SPI adapter.

Information about the USB protocol interface can be found in the
Programmer's Reference Manual [1], see section 5.4.6 for the SPI
master module commands and responses.

[1] https://www.diolan.com/downloads/dln-api-manual.pdf

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 18:36:46 +00:00
Lee Jones
9e862375c5 spi: Add new driver for STMicroelectronics' SPI Controller
This patch adds support for the SPI portion of ST's SSC device.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 18:16:14 +00:00
Andrew Bresticker
c0e7dc21d3 spi: img-spfi: Enable controller before starting TX DMA
It is recommended that the SPFI controller be enabled (i.e. setting
SPFI_EN in SPFI_CONTROL) before TX DMA begins.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 17:52:07 +00:00
Jarkko Nikula
2c658e212c spi: Remove FSF mailing addresses
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 15:32:42 +00:00
Rafael J. Wysocki
47164fdb3b spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
A couple of new CONFIG_PM_RUNTIME users have been added recently
in the SPI subsystem.

However, after commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if
PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so
#ifdef blocks depending on CONFIG_PM_RUNTIME may now be changed to
depend on CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere under
drivers/spi/ (again).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
2014-12-19 15:25:31 +01:00
Linus Torvalds
c0f486fde3 More ACPI and power management updates for 3.19-rc1
- Fix a regression in leds-gpio introduced by a recent commit that
    inadvertently changed the name of one of the properties used by
    the driver (Fabio Estevam).
 
  - Fix a regression in the ACPI backlight driver introduced by a
    recent fix that missed one special case that had to be taken
    into account (Aaron Lu).
 
  - Drop the level of some new kernel messages from the ACPI core
    introduced by a recent commit to KERN_DEBUG which they should
    have used from the start and drop some other unuseful KERN_ERR
    messages printed by ACPI (Rafael J Wysocki).
 
  - Revert an incorrect commit modifying the cpupower tool
    (Prarit Bhargava).
 
  - Fix two regressions introduced by recent commits in the OPP
    library and clean up some existing minor issues in that code
    (Viresh Kumar).
 
  - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout
    the tree (or drop it where that can be done) in order to make
    it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki,
    Ulf Hansson, Ludovic Desroches).  There will be one more
    "CONFIG_PM_RUNTIME removal" batch after this one, because some
    new uses of it have been introduced during the current merge
    window, but that should be sufficient to finally get rid of it.
 
  - Make the ACPI EC driver more robust against race conditions
    related to GPE handler installation failures (Lv Zheng).
 
  - Prevent the ACPI device PM core code from attempting to
    disable GPEs that it has not enabled which confuses ACPICA
    and makes it report errors unnecessarily (Rafael J Wysocki).
 
  - Add a "force" command line switch to the intel_pstate driver
    to make it possible to override the blacklisting of some
    systems in that driver if needed (Ethan Zhao).
 
  - Improve intel_pstate code documentation and add a MAINTAINERS
    entry for it (Kristen Carlson Accardi).
 
  - Make the ACPI fan driver create cooling device interfaces
    witn names that reflect the IDs of the ACPI device objects
    they are associated with, except for "generic" ACPI fans
    (PNP ID "PNP0C0B").  That's necessary for user space thermal
    management tools to be able to connect the fans with the
    parts of the system they are supposed to be cooling properly.
    From Srinivas Pandruvada.
 
 /
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Merge tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management updates from Rafael Wysocki:
 "These are regression fixes (leds-gpio, ACPI backlight driver,
  operating performance points library, ACPI device enumeration
  messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device
  PM), some cleanups in the operating performance points (OPP)
  framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of
  minor intel_pstate driver changes, a new MAINTAINERS entry for it and
  an ACPI fan driver change needed for better support of thermal
  management in user space.

  Specifics:

   - Fix a regression in leds-gpio introduced by a recent commit that
     inadvertently changed the name of one of the properties used by the
     driver (Fabio Estevam).

   - Fix a regression in the ACPI backlight driver introduced by a
     recent fix that missed one special case that had to be taken into
     account (Aaron Lu).

   - Drop the level of some new kernel messages from the ACPI core
     introduced by a recent commit to KERN_DEBUG which they should have
     used from the start and drop some other unuseful KERN_ERR messages
     printed by ACPI (Rafael J Wysocki).

   - Revert an incorrect commit modifying the cpupower tool (Prarit
     Bhargava).

   - Fix two regressions introduced by recent commits in the OPP library
     and clean up some existing minor issues in that code (Viresh
     Kumar).

   - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the
     tree (or drop it where that can be done) in order to make it
     possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf
     Hansson, Ludovic Desroches).

     There will be one more "CONFIG_PM_RUNTIME removal" batch after this
     one, because some new uses of it have been introduced during the
     current merge window, but that should be sufficient to finally get
     rid of it.

   - Make the ACPI EC driver more robust against race conditions related
     to GPE handler installation failures (Lv Zheng).

   - Prevent the ACPI device PM core code from attempting to disable
     GPEs that it has not enabled which confuses ACPICA and makes it
     report errors unnecessarily (Rafael J Wysocki).

   - Add a "force" command line switch to the intel_pstate driver to
     make it possible to override the blacklisting of some systems in
     that driver if needed (Ethan Zhao).

   - Improve intel_pstate code documentation and add a MAINTAINERS entry
     for it (Kristen Carlson Accardi).

   - Make the ACPI fan driver create cooling device interfaces witn
     names that reflect the IDs of the ACPI device objects they are
     associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B").

     That's necessary for user space thermal management tools to be able
     to connect the fans with the parts of the system they are supposed
     to be cooling properly.  From Srinivas Pandruvada"

* tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
  MAINTAINERS: add entry for intel_pstate
  ACPI / video: update the skip case for acpi_video_device_in_dod()
  power / PM: Eliminate CONFIG_PM_RUNTIME
  NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  ACPI / EC: Fix unexpected ec_remove_handlers() invocations
  Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()"
  tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c
  PM: Remove the SET_PM_RUNTIME_PM_OPS() macro
  mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro
  PM / Kconfig: Replace PM_RUNTIME with PM in dependencies
  ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  ACPI / PM: Do not disable wakeup GPEs that have not been enabled
  ACPI / utils: Drop error messages from acpi_evaluate_reference()
  ...
2014-12-18 20:28:33 -08:00
Hisashi Nakamura
015760563e spi: sh-msiof: Add runtime PM lock in initializing
SH-MSIOF driver is enabled autosuspend API of spi framework.
But autosuspend framework doesn't work during initializing.
So runtime PM lock is added in SH-MSIOF driver initializing.

Fixes: e2a0ba547b (spi: sh-msiof: Convert to spi core auto_runtime_pm framework)
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-12-15 17:36:45 +00:00
Linus Torvalds
e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Rafael J. Wysocki
ec83305032 spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
After commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks
depending on CONFIG_PM_RUNTIME may now be changed to depend on
CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere under
drivers/spi/.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
2014-12-13 00:41:15 +01:00
Linus Torvalds
7ef58b32f5 Devicetree changes for v3.19
Lots of activity in the devicetree code for v3.18. Most of it is related
 to getting all of the overlay support code in place, but there are other
 important things in there.
 
 There are a few trivial merge conflicts. They shouldn't give you any
 trouble.
 
 Highlights:
 - OF_RECONFIG notifiers for SPI, I2C and Platform devices. Those
   subsystems can now respond to live changes to the device tree.
 - CONFIG_OF_OVERLAY method for applying live changes to the device tree
 - Removal of the of_allnodes list. This used to be used to iterate over
   all the nodes in the device tree, but it is unnecessary because the
   same thing can be done by iterating over the list of child pointers.
   Getting rid of of_allnodes saves some memory and avoids the
   possibility of of_allnodes being sorted differently from the child
   lists.
 - Support for retrieving original DTB blob via sysfs. Needed by kexec.
 - More unittests
 - Documentation and minor bug fixes
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Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

Pull devicetree changes from Grant Likely:
 "Lots of activity in the devicetree code for v3.18.  Most of it is
  related to getting all of the overlay support code in place, but there
  are other important things in there.

  Highlights:

   - OF_RECONFIG notifiers for SPI, I2C and Platform devices.  Those
     subsystems can now respond to live changes to the device tree.

   - CONFIG_OF_OVERLAY method for applying live changes to the device
     tree

   - Removal of the of_allnodes list.  This used to be used to iterate
     over all the nodes in the device tree, but it is unnecessary
     because the same thing can be done by iterating over the list of
     child pointers.  Getting rid of of_allnodes saves some memory and
     avoids the possibility of of_allnodes being sorted differently from
     the child lists.

   - Support for retrieving original DTB blob via sysfs.  Needed by
     kexec.

   - More unittests

   - Documentation and minor bug fixes"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (42 commits)
  of: Delete unnecessary check before calling "of_node_put()"
  of: Drop ->next pointer from struct device_node
  spi: Check for spi_of_notifier when CONFIG_OF_DYNAMIC=y
  of: support passing console options with stdout-path
  of: add optional options parameter to of_find_node_by_path()
  of: Add bindings for chosen node, stdout-path
  of: Remove unneeded and incorrect MODULE_DEVICE_TABLE
  ARM: dt: fix up PL011 device tree bindings
  of: base, fix of_property_read_string_helper kernel-doc
  of: remove select of non-existant OF_DEVICE config symbol
  spi/of: Add OF notifier handler
  spi/of: Create new device registration method and accessors
  i2c/of: Add OF_RECONFIG notifier handler
  i2c/of: Factor out Devicetree registration code
  of/overlay: Add overlay unittests
  of/overlay: Introduce DT overlay support
  of/reconfig: Add OF_DYNAMIC notifier for platform_bus_type
  of/reconfig: Always use the same structure for notifiers
  of/reconfig: Add debug output for OF_RECONFIG notifiers
  of/reconfig: Add empty stubs for the of_reconfig methods
  ...
2014-12-11 13:06:58 -08:00
Linus Torvalds
b859e7d13b spi: Updates for v3.19
Not a huge amount going on this release, mainly new drivers (there's a
 couple more waiting that didn't quite make the cut for this release
 too):
 
  - An interface for querying if the current transfer is the last in a
    message, allowing controllers that need special handling for the
    final transfer to use the core message parsing.
  - Support for Amlogic Meson SPIFC, Imagination Technologies SFPI, Intel
    Quark X1000 and Samsung Exynos 7 controllers.
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Merge tag 'spi-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "Not a huge amount going on this release, mainly new drivers (there's a
  couple more waiting that didn't quite make the cut for this release
  too):

   - An interface for querying if the current transfer is the last in a
     message, allowing controllers that need special handling for the
     final transfer to use the core message parsing.
   - Support for Amlogic Meson SPIFC, Imagination Technologies SFPI,
     Intel Quark X1000 and Samsung Exynos 7 controllers"

* tag 'spi-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (38 commits)
  spi/s3c64xx: Remove redundant runtime PM management
  spi: fsl-spi: remove unused variable assignment
  spi: spi-fsl-spi: Return an error code in fsl_spi_do_one_msg()
  spi: core: Do not mangle error code from kthread_run()
  spi: fsl-espi: add (un)prepare_transfer_hardware calls to save power if SPI is not in use
  spi: fsl-(e)spi: migrate to generic master queueing
  spi/txx9: Deletion of an unnecessary check before the function call "clk_disable"
  spi: cadence: Fix 3-to-8 mux mode
  spi: cadence: Init HW after reading devicetree attributes
  spi: meson: Select REGMAP_MMIO
  spi: s3c64xx: add support for exynos7 SPI controller
  spi: spi-pxa2xx: SPI support for Intel Quark X1000
  spi: meson: meson_spifc_setup_speed() can be static
  spi: spi-pxa2xx: Add helpers for regiseters' accessing
  spi: spi-mxs: Fix mapping from vmalloc-ed buffer to scatter list
  spi: atmel: introduce probe deferring
  spi: atmel: remove compat for non DT board when requesting dma chan
  spi: meson: Add support for Amlogic Meson SPIFC
  spi: meson: Add device tree bindings documentation for SPIFC
  spi: core: Add spi_transfer_is_last() helper
  ...
2014-12-11 12:03:34 -08:00
Mark Brown
7f6d62a2ad spi/falcon: Remove hardware prepare and unprepare functions
They are completely empty and therefore serve no function.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-11 13:26:01 +00:00
Mark Brown
fc9e0f71f2 spi: Only idle the message pump in the worker kthread
In order to avoid the situation where the kthread is waiting for another
context to make the hardware idle let the message pump know if it's being
called from the worker thread context and if it isn't then defer to the
worker thread instead of idling the hardware immediately. This will ensure
that if this situation happens we block rather than busy waiting.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-11 12:25:30 +00:00
Mark Brown
0461a41498 spi: Pump transfers inside calling context for spi_sync()
If we are using the standard SPI message pump (which all drivers should be
transitioning over to) then special case the message enqueue and instead of
starting the worker thread to push messages to the hardware do so in the
context of the caller if the controller is idle. This avoids a context
switch in the common case where the controller has a single user in a
single thread, for short PIO transfers there may be no need to context
switch away from the calling context to complete the transfer.

The code is a bit more complex than is desirable in part due to the need
to handle drivers not using the standard queue and in part due to handling
the various combinations of bus locking and asynchronous submission in
interrupt context.

It is still suboptimal since it will still wake the message pump for each
transfer in order to schedule idling of the hardware and if multiple
contexts are using the controller simultaneously a caller may end up
pumping a message for some random other thread rather than for itself,
and if the thread ends up deferring due to another context idling the
hardware then it will just busy wait.  It can, however, have the benefit
of aggregating power up and down of the hardware when a caller performs
a series of transfers back to back without any need for the use of
spi_async().

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-11 12:23:51 +00:00
Mark Brown
983aee5d70 spi: Check to see if the device is processing a message before we idle
cur_msg is updated under the queue lock and holds the message we are
currently processing. Since currently we only ever do removals in the
pump kthread it doesn't matter in what order we do things but we want
to be able to push things out from the submitting thread so pull the
check to see if we're currently handling a message before we check to
see if the queue is idle.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-11 12:23:23 +00:00
Mark Brown
5424d43e4d spi: Move queue data structure initialisation to main master init
Since most devices now do use the standard queue and in order to avoid
initialisation ordering issues being introduced by further refactorings
to improve performance move the initialisation of the queue and the lock
for it to the main master allocation.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-11 12:23:13 +00:00
Rafael J. Wysocki
e3d857e1ae Merge branch 'pm-runtime'
* pm-runtime: (25 commits)
  i2c-omap / PM: Drop CONFIG_PM_RUNTIME from i2c-omap.c
  dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  e1000e / igb / PM: Eliminate CONFIG_PM_RUNTIME
  MMC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  MFD / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  misc / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  media / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  input / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  iio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  hsi / OMAP / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  i2c-hid / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  drm / exynos / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  gpio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  hwrandom / exynos / PM: Use CONFIG_PM in #ifdef
  block / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  USB / PM: Drop CONFIG_PM_RUNTIME from the USB core
  PM: Merge the SET*_RUNTIME_PM_OPS() macros
  PM / Kconfig: Do not select PM directly from Kconfig files
  PCI / PM: Drop CONFIG_PM_RUNTIME from the PCI core
  ...
2014-12-08 20:00:44 +01:00
Mark Brown
0e647037fe Merge remote-tracking branches 'spi/topic/spidev' and 'spi/topic/txx9' into spi-next 2014-12-08 12:17:20 +00:00
Mark Brown
f56be67b19 Merge remote-tracking branches 'spi/topic/mxs', 'spi/topic/pxa', 'spi/topic/rockchip', 'spi/topic/samsung' and 'spi/topic/sirf' into spi-next 2014-12-08 12:17:17 +00:00
Mark Brown
dcf695b5f3 Merge remote-tracking branches 'spi/topic/fsl-dspi', 'spi/topic/fsl-espi', 'spi/topic/gpio', 'spi/topic/img-spfi' and 'spi/topic/meson' into spi-next 2014-12-08 12:17:15 +00:00
Mark Brown
3bcfca617a Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/cadence', 'spi/topic/dw' and 'spi/topic/fsl-cpm' into spi-next 2014-12-08 12:17:12 +00:00
Mark Brown
19a0368028 Merge remote-tracking branch 'spi/topic/core' into spi-next 2014-12-08 12:17:11 +00:00
Mark Brown
c9508d4b3a Merge remote-tracking branch 'spi/fix/cadence' into spi-linus 2014-12-08 12:17:10 +00:00
Mark Brown
bc88f11baf spi/s3c64xx: Remove redundant runtime PM management
The device already asks the core to hold a runtime PM reference while it
is active so it is redundant to open code that in the driver itself.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-07 13:47:21 +00:00
Heiner Kallweit
1a7e06d260 spi: fsl-spi: remove unused variable assignment
Remove an unused variable assignment.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04 22:44:05 +00:00
Fabio Estevam
75c410884a spi: spi-fsl-spi: Return an error code in fsl_spi_do_one_msg()
Since commit c592becbe7 ("spi: fsl-(e)spi: migrate to generic master
queueing") the function fsl_spi_do_one_msg() is not void anymore, so return
an error code to avoid the following buid warning:

   drivers/spi/spi-fsl-spi.c: In function 'fsl_spi_do_one_msg':
>> drivers/spi/spi-fsl-spi.c:374:4: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
       return;
       ^

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04 22:43:56 +00:00
Jarkko Nikula
98a8f5a053 spi: core: Do not mangle error code from kthread_run()
kthread_run() could return ERR_PTR(-EINTR) from kthread_create_on_node().
Return the actual error code in spi_init_queue() instead of mangling it to
-ENOMEM.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04 22:42:37 +00:00
Rafael J. Wysocki
6ed23b806e PM: Merge the SET*_RUNTIME_PM_OPS() macros
The SET_PM_RUNTIME_PM_OPS() and SET_RUNTIME_PM_OPS() macros are
identical except that one of them is not empty for CONFIG_PM set,
while the other one is not empty for CONFIG_PM_RUNTIME set,
respectively.

However, after commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if
PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so one
of these macros is now redundant.

For this reason, replace SET_PM_RUNTIME_PM_OPS() with
SET_RUNTIME_PM_OPS() everywhere and redefine the SET_PM_RUNTIME_PM_OPS
symbol as SET_RUNTIME_PM_OPS in case new code is starting to use the
macro being removed here.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-04 00:51:30 +01:00
Fabio Estevam
5267720e75 spi: Check for spi_of_notifier when CONFIG_OF_DYNAMIC=y
Since commit ce79d54ae4 ("spi/of: Add OF notifier handler") the
following warning is seen on a imx53 system that has CONFIG_OF_DYNAMIC=n:

[    0.048119] ------------[ cut here ]------------
[    0.048146] WARNING: CPU: 0 PID: 1 at drivers/spi/spi.c:2419 spi_init+0x60/0xa8()
[    0.048158] Modules linked in:
[    0.048183] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc6-next-20141126-00003-g9388e85 #2080
[    0.048193] Hardware name: Freescale i.MX53 (Device Tree Support)
[    0.048203] Backtrace:
[    0.048235] [<80011f74>] (dump_backtrace) from [<80012110>] (show_stack+0x18/0x1c)
[    0.048246]  r6:00000973 r5:00000000 r4:00000000 r3:00000000
[    0.048284] [<800120f8>] (show_stack) from [<806b3ad8>] (dump_stack+0x88/0xa4)
[    0.048312] [<806b3a50>] (dump_stack) from [<8002a55c>] (warn_slowpath_common+0x80/0xbc)
[    0.048320]  r5:8096cfcc r4:00000000
[    0.048343] [<8002a4dc>] (warn_slowpath_common) from [<8002a5bc>] (warn_slowpath_null+0x24/0x2c)
[    0.048354]  r8:8096cf6c r7:809355ec r6:ddcd7c00 r5:812029e4 r4:00000000
[    0.048389] [<8002a598>] (warn_slowpath_null) from [<8096cfcc>] (spi_init+0x60/0xa8)
[    0.048405] [<8096cf6c>] (spi_init) from [<80008a7c>] (do_one_initcall+0x88/0x1e0)
[    0.048415]  r5:8099e018 r4:8099e018
[    0.048438] [<800089f4>] (do_one_initcall) from [<80935e38>] (kernel_init_freeable+0x110/0x1e0)
[    0.048448]  r10:80980700 r9:809806e4 r8:000000cc r7:809355ec r6:809f8940 r5:00000002
[    0.048478]  r4:8098d744
[    0.048508] [<80935d28>] (kernel_init_freeable) from [<806ae574>] (kernel_init+0x10/0xf4)
[    0.048517]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:806ae564
[    0.048547]  r4:00000000
[    0.048565] [<806ae564>] (kernel_init) from [<8000ed68>] (ret_from_fork+0x14/0x2c)
[    0.048574]  r4:00000000 r3:00000000
[    0.048616] ---[ end trace 405a65d177dae4fd ]---

Only check of_reconfig_notifier_register() in the CONFIG_OF_DYNAMIC=y case,
as intended by commit ce79d54ae4.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-12-03 23:12:39 +00:00
Heiner Kallweit
75506d0e00 spi: fsl-espi: add (un)prepare_transfer_hardware calls to save power if SPI is not in use
Use (un)prepare_transfer_hardware calls to set fsl-espi to
low-power idle if not in use. Reference manual states:

"The eSPI is in a idle state and consumes minimal power.
The eSPI BRG is not functioning and the input clock is disabled"

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-03 13:05:47 +00:00
Heiner Kallweit
c592becbe7 spi: fsl-(e)spi: migrate to generic master queueing
Migrates the fsl-(e)spi driver to use the generic master queuing.
Avoids the "master is unqueued, this is deprecated" warning.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-03 13:05:47 +00:00
Markus Elfring
7d57cd8946 spi/txx9: Deletion of an unnecessary check before the function call "clk_disable"
The clk_disable() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-01 19:25:14 +00:00
Lars-Peter Clausen
ee0ebe8100 spi: cadence: Fix 3-to-8 mux mode
In 3-to-8 mux mode for the CS pins we need to set the PERI_SEL bit in the
control register. Currently the driver never sets this bit even when
configured for 3-to-8 mux mode. This patch adds code which sets the bit
during device initialization when necessary.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Harini Katakam <harinik@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-28 11:42:11 +00:00
Paul Cercueil
3cc291061c spi: cadence: Init HW after reading devicetree attributes
This will make it possible to use the settings specified in the devicetree
to configure the hardware.

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-28 11:41:13 +00:00
Beniamino Galvani
1327ecd47f spi: meson: Select REGMAP_MMIO
The Meson SPIFC driver uses regmap mmio functions and so it must
select REGMAP_MMIO to avoid the following build error:

spi-meson-spifc.c: undefined reference to `devm_regmap_init_mmio_clk'

Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-27 11:00:16 +00:00
Mark Brown
ec058615f1 Merge remote-tracking branches 'spi/fix/dw' and 'spi/fix/sirf' into spi-linus 2014-11-26 19:05:25 +00:00
Mark Brown
13616c7133 Merge remote-tracking branch 'spi/fix/dma' into spi-linus 2014-11-26 19:05:25 +00:00
Padmavathi Venna
bf77cba95f spi: s3c64xx: add support for exynos7 SPI controller
Exynos7 SPI controller supports only the auto Selection of
CS toggle mode and Exynos7 SoC includes six SPI controllers.
Add support for these changes in Exynos7 SPI controller driver.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-26 19:00:34 +00:00
Weike Chen
e5262d0568 spi: spi-pxa2xx: SPI support for Intel Quark X1000
There are two SPI controllers exported by PCI subsystem for Intel Quark X1000.
The SPI memory mapped I/O registers supported by Quark are different from
the current implementation, and Quark only supports the registers of 'SSCR0',
'SSCR1', 'SSSR', 'SSDR', and 'DDS_RATE'. This patch is to enable the SPI for
Intel Quark X1000.

This piece of work is derived from Dan O'Donovan's initial work for Intel Quark
X1000 SPI enabling.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Weike Chen <alvin.chen@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-26 18:07:45 +00:00
Pantelis Antoniou
ce79d54ae4 spi/of: Add OF notifier handler
Add OF notifier handler needed for creating/destroying spi devices
according to dynamic runtime changes in the DT live tree. This code is
enabled when CONFIG_OF_DYNAMIC is selected.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: <linux-spi@vger.kernel.org>
2014-11-25 15:36:24 +00:00
Pantelis Antoniou
aff5e3f89a spi/of: Create new device registration method and accessors
Dynamically inserting spi device nodes requires the use of a single
device registration method. Refactor the existing
of_register_spi_devices() to split out the core functionality for a
single device into a separate function; of_register_spi_device(). This
function will be used by the OF_DYNAMIC overlay code to make live
modifications to the tree.

Methods to lookup a device/master using a device node are added
as well, of_find_spi_master_by_node() & of_find_spi_device_by_node().

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[grant.likely] Split patch into two pieces for clarity
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: <linux-spi@vger.kernel.org>
2014-11-25 15:35:43 +00:00
kbuild test robot
008c2a2ef0 spi: meson: meson_spifc_setup_speed() can be static
drivers/spi/spi-meson-spifc.c:171:6: sparse: symbol 'meson_spifc_setup_speed' was not declared. Should it be static?

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-25 12:08:24 +00:00
Weike Chen
4fdb2424cc spi: spi-pxa2xx: Add helpers for regiseters' accessing
There are several registers for SPI, and the registers of 'SSCR0' and 'SSCR1'
are accessed frequently. This path is to introduce helper functions to
simplify the accessing of 'SSCR0' and 'SSCR1'.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Weike Chen <alvin.chen@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 19:00:01 +00:00
Charles Keepax
9e8987acf0 spi: spi-mxs: Fix mapping from vmalloc-ed buffer to scatter list
We can only use page_address on memory that has been mapped using kmap,
when the buffer passed to the SPI has been allocated by vmalloc the page
has not necessarily been mapped through kmap. This means sometimes
page_address will return NULL causing the pointer we pass to sg_init_one
to be invalid. Currently, this issue doesn't show up on the MXS
architecture as the defconfig defines CONFIG_HIGHMEM=n which means all
pages are mapped. For the sake of robustness though it is best to
correct the issue.

As we only call page_address so that we can pass a virtual address to
sg_init_one which will eventually call virt_to_page on it, fix this
by calling sg_set_page directly rather then relying on the sg_init_one
helper.

Note this patch is only build tested as I don't have an MXS system to
test on.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:58:08 +00:00
Ludovic Desroches
5e9af37e46 spi: atmel: introduce probe deferring
Return probe defer if requesting a dma channel without a dma controller
probed.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:57:37 +00:00
Ludovic Desroches
7758e39069 spi: atmel: remove compat for non DT board when requesting dma chan
All boards with a dma controller have DT support so using
dma_request_slave_channel_compat is no more needed.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:57:37 +00:00
Beniamino Galvani
c3e4bc5434 spi: meson: Add support for Amlogic Meson SPIFC
This is a driver for the Amlogic Meson SPIFC (SPI flash controller),
which is one of the two SPI controllers available on the SoC. It
doesn't support DMA and has a 64-byte unified transmit/receive buffer.

The device is optimized for interfacing with SPI NOR memories and
allows the execution of standard operations such as read, page
program, sector erase, etc. in a simplified way, toggling a bit in a
dedicated register. The driver doesn't use those predefined commands
and relies only on custom transfers.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:54:48 +00:00
Christophe Leroy
194ed900ca spi: fsl-spi: Don't use cpm_command on CPM1
On CPM1, when the SPI parameter RAM is relocated to somewhere else than the
default location, in accordance with freescale documentation
(refer micropatch SPI application note EB662), init RX/TX params command shall
not be used because it doesn't take into account the new location, and
overwrites data that is in original location of SPI param ram at addresses
SCC2 param base +  (u32*)0x88 (u16*)0x90 (u32*)0x98 (u16*)0xA0, hence breaking
activity on SCC2 if SCC2 is used in a mode like QMC for instance.

Therefore, the action shall be done manually as described by freescale and as
was already partly done by the driver.

Reported-by: Patrick Vasseur <patrick.vasseur@c-s.fr>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Patrick Vasseur <patrick.vasseur@c-s.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-21 18:12:42 +00:00
Qipan Li
8509c55fcb spi: sirf: reset SPI controller in init stage
in SPI boot mode, romcode uses SPI controller to fetch data from NOR
flash. Here we need to reset the hardware IP to restore its state.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-21 18:11:21 +00:00
Qipan Li
fcc50e5cd2 spi: sirf: assign spi_master's max_speed_hz member
if spi device has no frequency, spi core will setup the default frequency
to max_speed_hz of spi_master according to
int spi_setup(struct spi_device *spi)
{
	...
        if (!spi->max_speed_hz)
                spi->max_speed_hz = spi->master->max_speed_hz;
	...
}
this patch moves CSR SiRFSoC SPI frequency set to follow SPI core behaviour.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-18 14:45:02 +00:00
Qipan Li
9c4b19a07d spi: sirf: fix word width configuration
commit 8c328a262f ("spi: sirf: Avoid duplicate code in various
bits_per_word cases") is wrong in setting data width register of
fifo is not right, it should use sspi->word_width >> 1 to set
related bits. According to hardware spec, the mapping between
register value and data width:
0 - byte
1 - WORD
2 - DWORD

Fixes: 8c328a262f ("spi: sirf: Avoid duplicate code in various bits_per_word cases") is wrong in setting data width register of
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-18 14:43:22 +00:00
Andrew Bresticker
deba25800a spi: Add driver for IMG SPFI controller
Add support for the Synchronous Peripheral Flash Interface (SPFI) master
controller found on IMG SoCs.  The SPFI controller supports 5 chip-select
lines and single/dual/quad mode SPI transfers.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-17 13:31:08 +00:00
Charles Keepax
c1aefbdd05 spi: Fix mapping from vmalloc-ed buffer to scatter list
We can only use page_address on memory that has been mapped using kmap,
when the buffer passed to the SPI has been allocated by vmalloc the page
has not necessarily been mapped through kmap. This means sometimes
page_address will return NULL causing the pointer we pass to sg_set_buf
to be invalid.

As we only call page_address so that we can pass a virtual address to
sg_set_buf which will then immediately call virt_to_page on it, fix this
by calling sg_set_page directly rather then relying on the sg_set_buf
helper.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-17 10:40:10 +00:00
Laurentiu Palcu
dfcc2e3549 spi/rockchip: remove redundant call to spi_master_put()
The call to spi_master_put() in rockchip_spi_remove() is redundant since
the master is registered using devm_. This patch removes it.

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-12 15:04:18 +00:00
Mark Brown
9169051617 spi: spidev: Don't mangle max_speed_hz in underlying spi device
Currently spidev allows callers to set the default speed by overriding the
max_speed_hz in the underlying device. This achieves the immediate goal but
is not what devices expect and can easily lead to userspace trying to set
unsupported speeds and succeeding, apart from anything else drivers can't
set a limit on the speed using max_speed_hz as they'd expect and any other
devices on the bus will be affected.

Instead store the default speed in the spidev struct and fill this in on
each transfer.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-11 18:01:28 +00:00
Fabio Estevam
617100c271 spi: spi-mxs: Register the irq with the device name
Instead of registering the irq name with the driver name, it's better to pass
the device name so that we have a more explicit indication as to what spi
instance the irq is related:

$ cat /proc/interrupts
           CPU0
...
 27:          0         -  98  80014000.ssp

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-10 19:37:30 +00:00
Torsten Fleischer
cfb4bbd8fb spi: spi-gpio: Fix compiler warning when building for 64 bit systems
The assignment of SPI_GPIO_NO_CHIPSELECT to cs_gpios[0] causes the following
compiler warning, when building for 64 bit systems:
"warning: overflow in implicit constant conversion [-Woverflow]".

This is because the SPI_GPIO_NO_CHIPSELECT flag is a '-1' type casted to
unsigned long and cs_gpios is of the type int.

Furthermore the chip select's GPIO number is locally stored as unsigned int
and compared with SPI_GPIO_NO_CHIPSELECT. Thus the result of the comparison
is always false, if unsigned long and unsigned int have a different size.

As part of the fix this patch adds a check for the device tree's cs-gpios
property.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Torsten Fleischer <torfl6749@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-08 09:12:57 +00:00
Thor Thayer
0a8727e697 spi: dw: Fix dynamic speed change.
An IOCTL call that calls spi_setup() and then dw_spi_setup() will
overwrite the persisted last transfer speed. On each transfer, the
SPI speed is compared to the last transfer speed to determine if the
clock divider registers need to be updated (did the speed change?).
This bug was observed with the spidev driver using spi-config to
update the max transfer speed.

This fix: Don't overwrite the persisted last transaction clock speed
when updating the SPI parameters in dw_spi_setup(). On the next
transaction, the new speed won't match the persisted last speed
and the hardware registers will be updated.
On initialization, the persisted last transaction clock
speed will be 0 but will be updated after the first SPI
transaction.

Move zeroed clock divider check into clock change test because
chip->clk_div is zero on startup and would cause a divide-by-zero
error. The calculation was wrong as well (can't support odd #).

Reported-by: Vlastimil Setka <setka@vsis.cz>
Signed-off-by: Vlastimil Setka <setka@vsis.cz>
Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-07 10:14:59 +00:00
Mark Brown
4e72b4278d Merge remote-tracking branches 'spi/fix/fsl-dspi' and 'spi/fix/pxa2xx' into spi-linus 2014-11-06 12:58:46 +00:00
Dmitry Eremin-Solenikov
2b9375b91b spi: pxa2xx: toggle clocks on suspend if not disabled by runtime PM
If PM_RUNTIME is enabled, it is easy to trigger the following backtrace
on pxa2xx hosts:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at /home/lumag/linux/arch/arm/mach-pxa/clock.c:35 clk_disable+0xa0/0xa8()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 3.17.0-00007-g1b3d2ee-dirty #104
[<c000de68>] (unwind_backtrace) from [<c000c078>] (show_stack+0x10/0x14)
[<c000c078>] (show_stack) from [<c001d75c>] (warn_slowpath_common+0x6c/0x8c)
[<c001d75c>] (warn_slowpath_common) from [<c001d818>] (warn_slowpath_null+0x1c/0x24)
[<c001d818>] (warn_slowpath_null) from [<c0015e80>] (clk_disable+0xa0/0xa8)
[<c0015e80>] (clk_disable) from [<c02507f8>] (pxa2xx_spi_suspend+0x2c/0x34)
[<c02507f8>] (pxa2xx_spi_suspend) from [<c0200360>] (platform_pm_suspend+0x2c/0x54)
[<c0200360>] (platform_pm_suspend) from [<c0207fec>] (dpm_run_callback.isra.14+0x2c/0x74)
[<c0207fec>] (dpm_run_callback.isra.14) from [<c0209254>] (__device_suspend+0x120/0x2f8)
[<c0209254>] (__device_suspend) from [<c0209a94>] (dpm_suspend+0x50/0x208)
[<c0209a94>] (dpm_suspend) from [<c00455ac>] (suspend_devices_and_enter+0x8c/0x3a0)
[<c00455ac>] (suspend_devices_and_enter) from [<c0045ad4>] (pm_suspend+0x214/0x2a8)
[<c0045ad4>] (pm_suspend) from [<c04b5c34>] (test_suspend+0x14c/0x1dc)
[<c04b5c34>] (test_suspend) from [<c000880c>] (do_one_initcall+0x8c/0x1fc)
[<c000880c>] (do_one_initcall) from [<c04aecfc>] (kernel_init_freeable+0xf4/0x1b4)
[<c04aecfc>] (kernel_init_freeable) from [<c0378078>] (kernel_init+0x8/0xec)
[<c0378078>] (kernel_init) from [<c0009590>] (ret_from_fork+0x14/0x24)
---[ end trace 46524156d8faa4f6 ]---

This happens because suspend function tries to disable a clock that is
already disabled by runtime_suspend callback. Add if
(!pm_runtime_suspended()) checks to suspend/resume path.

Fixes: 7d94a50585 (spi/pxa2xx: add support for runtime PM)
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Reported-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-06 12:54:00 +00:00
Torsten Fleischer
d1d8180252 spi: spi-gpio: Add dt support for a single device with no chip select
In order to describe a single slave device that has no chip select line
the 'num-chipselects' property has to be <0> and the 'cs-gpios' property
doesn't need to be set.

Signed-off-by: Torsten Fleischer <torfl6749@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-04 19:57:25 +00:00
Alexander Stein
5cc7b04740 spi: fsl-dspi: Fix CTAR selection
There are only 4 CTAR registers (CTAR0 - CTAR3) so we can only use the
lower 2 bits of the chip select to select a CTAR register.
SPI_PUSHR_CTAS used the lower 3 bits which would result in wrong bit values
if the chip selects 4/5 are used. For those chip selects SPI_CTAR even
calculated offsets of non-existing registers.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-04 10:52:08 +00:00
Greg Kroah-Hartman
a8a93c6f99 Merge branch 'platform/remove_owner' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next
Remove all .owner fields from platform drivers
2014-11-03 19:53:56 -08:00
Andy Shevchenko
30c8eb52cc spi: dw-mid: split rx and tx callbacks when DMA
Currently driver wouldn't work properly if user asked for simplex transfer. The
patch separates DMA rx and tx callbacks and finishes transfer correctly in any
case.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 22:40:38 +00:00
Andy Shevchenko
a5c2db964d spi: dw-mid: refactor to use helpers
This patch splits few helpers, namely dw_spi_dma_prepare_rx(),
dw_spi_dma_prepare_tx(), and dw_spi_dma_setup() which will be useful for the
consequent improvements.

There is no functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 22:40:38 +00:00
Mark Brown
1e2cf73e6b Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/orion', 'spi/fix/pl022', 'spi/fix/rockchip' and 'spi/fix/spidev' into spi-linus 2014-10-27 11:26:54 +00:00
Greg Ungerer
9a2d363552 spi: orion: fix potential NULL pointer de-reference
It's possible that the call to of_match_device() (introduced in commit
df59fa7f ["spi: orion: support armada extended baud rates"]) may return
a NULL if there is no match in the device tree (or perhaps no device tree
at all). Check the return pointer and set the local device data to the
lowest common denominator orion device data if it is NULL.

Reported-by: Karl Beldan <karl.beldan@gmail.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-22 11:05:54 +01:00
Wenyou Yang
c1ee8f3fdf spi/atmel: improve the system suspend/resume functions implementation
To make it cleaner, the system suspend/resume directly call
the runtime suspend/resume functions
and remove the wapper of CONFIG_PM_RUNTIME, CONFIG_PM_SLEEP.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-21 22:27:14 +01:00
Wolfram Sang
14ac00e033 spi: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:21:36 +02:00
Xiubo Li
409851c38c spi: fsl-dspi: remove useless code for dspi driver.
Since we are using regmap framework's internal locks, so the
lock_arg for dspi_regmap_config is redundant here.

This patch just remove it, and then the dspi_regmap_config could
be const type.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-20 12:28:35 +01:00
Fengguang Wu
d0de6ff6b9 spi/atmel: fix simple_return.cocci warnings
drivers/spi/spi-atmel.c:1518:1-4: WARNING: end returns can be simpified and declaration on line 1514 can be dropped

 Simplify a trivial if-return sequence.  Possibly combine with a
 preceding function call.
Generated by: scripts/coccinelle/misc/simple_return.cocci

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-20 12:24:18 +01:00
Wenyou Yang
ce0c4caf25 spi/atmel: add support for runtime PM
Drivers should put the device into low power states proactively whenever the
device is not in use. Thus implement support for runtime PM and use the
autosuspend feature to make sure that we can still perform well in case we see
lots of SPI traffic within short period of time.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-20 12:24:18 +01:00
Vinod Koul
5398ad6897 spi/atmel: use dmaengine_terminate_all() API
The drivers should use dmaengine_terminate_all() API instead of
accessing the device_control which will be deprecated soon

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-20 12:24:18 +01:00
Linus Torvalds
52d589a01d Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 "For dmaengine contributions we have:
   - designware cleanup by Andy
   - my series moving device_control users to dmanegine_xxx APIs for
     later removal of device_control API
   - minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma
     etc"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits)
  serial: atmel: add missing dmaengine header
  dmaengine: remove FSLDMA_EXTERNAL_START
  dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method
  carma-fpga: move to fsl_dma_external_start()
  carma-fpga: use dmaengine_xxx() API
  dmaengine: freescale: add and export fsl_dma_external_start()
  dmaengine: add dmaengine_prep_dma_sg() helper
  video: mx3fb: use dmaengine_terminate_all() API
  serial: sh-sci: use dmaengine_terminate_all() API
  net: ks8842: use dmaengine_terminate_all() API
  mtd: sh_flctl: use dmaengine_terminate_all() API
  mtd: fsmc_nand: use dmaengine_terminate_all() API
  V4L2: mx3_camer: use dmaengine_pause() API
  dmaengine: coh901318: use dmaengine_terminate_all() API
  pata_arasan_cf: use dmaengine_terminate_all() API
  dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause()
  dmaengine: dw: export probe()/remove() and Co to users
  dmaengine: dw: enable and disable controller when needed
  dmaengine: dw: always export dw_dma_{en,dis}able
  dmaengine: dw: introduce dw_dma_on() helper
  ...
2014-10-18 18:11:04 -07:00
Addy Ke
2c2bc7489e spi/rockchip: spi controller must be disabled in tx callback too
Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-17 14:29:22 +02:00
Addy Ke
c28be31b11 spi/rockchip: fix bug that cause spi transfer timed out in DMA duplex mode
In rx mode, dma must be prepared before spi is enabled.
But in tx and tr mode, spi must be enabled first.

Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-15 15:05:38 +02:00
Addy Ke
f9cfd52262 spi/rockchip: fix bug that case spi can't go as fast as slave request
Because the minimum divisor in rk3x's spi controller is 2,
if spi_clk is less than 2 * sclk_out, we can't get the right divisor.
So we must set spi_clk again to match slave request.

Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-15 15:05:38 +02:00
Ray Jui
3ffa6158f0 spi: pl022: Fix incorrect dma_unmap_sg
When mapped RX DMA entries are unmapped in an error condition when DMA
is firstly configured in the driver, the number of TX DMA entries was
passed in, which is incorrect

Signed-off-by: Ray Jui <rjui@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-10-13 13:08:35 +02:00
Ray Jui
865f6d1974 spi: spidev: Use separate TX and RX bounce buffers
By using separate TX and RX bounce buffers, we avoid potential cache
flush and invalidation sequence issue that may be encountered when a
single bounce buffer is shared between TX and RX

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: JD (Jiandong) Zheng <jdzheng@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-13 13:07:12 +02:00
Linus Torvalds
b528392669 ACPI and power management updates for 3.18-rc1
- Rework the handling of wakeup IRQs by the IRQ core such that
    all of them will be switched over to "wakeup" mode in
    suspend_device_irqs() and in that mode the first interrupt
    will abort system suspend in progress or wake up the system
    if already in suspend-to-idle (or equivalent) without executing
    any interrupt handlers.  Among other things that eliminates the
    wakeup-related motivation to use the IRQF_NO_SUSPEND interrupt
    flag with interrupts which don't really need it and should not
    use it (Thomas Gleixner and Rafael J Wysocki).
 
  - Switch over ACPI to handling wakeup interrupts with the help
    of the new mechanism introduced by the above IRQ core rework
    (Rafael J Wysocki).
 
  - Rework the core generic PM domains code to eliminate code that's
    not used, add DT support and add a generic mechanism by which
    devices can be added to PM domains automatically during
    enumeration (Ulf Hansson, Geert Uytterhoeven and Tomasz Figa).
 
  - Add debugfs-based mechanics for debugging generic PM domains
    (Maciej Matraszek).
 
  - ACPICA update to upstream version 20140828.  Included are updates
    related to the SRAT and GTDT tables and the _PSx methods are in
    the METHOD_NAME list now (Bob Moore and Hanjun Guo).
 
  - Add _OSI("Darwin") support to the ACPI core (unfortunately, that
    can't really be done in a straightforward way) to prevent
    Thunderbolt from being turned off on Apple systems after boot
    (or after resume from system suspend) and rework the ACPI Smart
    Battery Subsystem (SBS) driver to work correctly with Apple
    platforms (Matthew Garrett and Andreas Noever).
 
  - ACPI LPSS (Low-Power Subsystem) driver update cleaning up the
    code, adding support for 133MHz I2C source clock on Intel Baytrail
    to it and making it avoid using UART RTS override with Auto Flow
    Control (Heikki Krogerus).
 
  - ACPI backlight updates removing the video_set_use_native_backlight
    quirk which is not necessary any more, making the code check the
    list of output devices returned by the _DOD method to avoid
    creating acpi_video interfaces that won't work and adding a quirk
    for Lenovo Ideapad Z570 (Hans de Goede, Aaron Lu and Stepan Bujnak).
 
  - New Win8 ACPI OSI quirks for some Dell laptops (Edward Lin).
 
  - Assorted ACPI code cleanups (Fabian Frederick, Rasmus Villemoes,
    Sudip Mukherjee, Yijing Wang, and Zhang Rui).
 
  - cpufreq core updates and cleanups (Viresh Kumar, Preeti U Murthy,
    Rasmus Villemoes).
 
  - cpufreq driver updates: cpufreq-cpu0/cpufreq-dt (driver name
    change among other things), ppc-corenet, powernv (Viresh Kumar,
    Preeti U Murthy, Shilpasri G Bhat, Lucas Stach).
 
  - cpuidle support for DT-based idle states infrastructure, new
    ARM64 cpuidle driver, cpuidle core cleanups (Lorenzo Pieralisi,
    Rasmus Villemoes).
 
  - ARM big.LITTLE cpuidle driver updates: support for DT-based
    initialization and Exynos5800 compatible string (Lorenzo Pieralisi,
    Kevin Hilman).
 
  - Rework of the test_suspend kernel command line argument and
    a new trace event for console resume (Srinivas Pandruvada,
    Todd E Brandt).
 
  - Second attempt to optimize swsusp_free() (hibernation core) to
    make it avoid going through all PFNs which may be way too slow on
    some systems (Joerg Roedel).
 
  - devfreq updates (Paul Bolle, Punit Agrawal, Ãrjan Eide).
 
  - rockchip-io Adaptive Voltage Scaling (AVS) driver and AVS
    entry update in MAINTAINERS (Heiko Stübner, Kevin Hilman).
 
  - PM core fix related to clock management (Geert Uytterhoeven).
 
  - PM core's sysfs code cleanup (Johannes Berg).
 
 /
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Merge tag 'pm+acpi-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:
 "Features-wise, to me the most important this time is a rework of
  wakeup interrupts handling in the core that makes them work
  consistently across all of the available sleep states, including
  suspend-to-idle.  Many thanks to Thomas Gleixner for his help with
  this work.

  Second is an update of the generic PM domains code that has been in
  need of some care for quite a while.  Unused code is being removed, DT
  support is being added and domains are now going to be attached to
  devices in bus type code in analogy with the ACPI PM domain.  The
  majority of work here was done by Ulf Hansson who also has been the
  most active developer this time.

  Apart from this we have a traditional ACPICA update, this time to
  upstream version 20140828 and a few ACPI wakeup interrupts handling
  patches on top of the general rework mentioned above.  There also are
  several cpufreq commits including renaming the cpufreq-cpu0 driver to
  cpufreq-dt, as this is what implements generic DT-based cpufreq
  support, and a new DT-based idle states infrastructure for cpuidle.

  In addition to that, the ACPI LPSS driver is updated, ACPI support for
  Apple machines is improved, a few bugs are fixed and a few cleanups
  are made all over.

  Finally, the Adaptive Voltage Scaling (AVS) subsystem now has a tree
  maintained by Kevin Hilman that will be merged through the PM tree.

  Numbers-wise, the generic PM domains update takes the lead this time
  with 32 non-merge commits, second is cpufreq (15 commits) and the 3rd
  place goes to the wakeup interrupts handling rework (13 commits).

  Specifics:

   - Rework the handling of wakeup IRQs by the IRQ core such that all of
     them will be switched over to "wakeup" mode in suspend_device_irqs()
     and in that mode the first interrupt will abort system suspend in
     progress or wake up the system if already in suspend-to-idle (or
     equivalent) without executing any interrupt handlers.  Among other
     things that eliminates the wakeup-related motivation to use the
     IRQF_NO_SUSPEND interrupt flag with interrupts which don't really
     need it and should not use it (Thomas Gleixner and Rafael Wysocki)

   - Switch over ACPI to handling wakeup interrupts with the help of the
     new mechanism introduced by the above IRQ core rework (Rafael Wysocki)

   - Rework the core generic PM domains code to eliminate code that's
     not used, add DT support and add a generic mechanism by which
     devices can be added to PM domains automatically during enumeration
     (Ulf Hansson, Geert Uytterhoeven and Tomasz Figa).

   - Add debugfs-based mechanics for debugging generic PM domains
     (Maciej Matraszek).

   - ACPICA update to upstream version 20140828.  Included are updates
     related to the SRAT and GTDT tables and the _PSx methods are in the
     METHOD_NAME list now (Bob Moore and Hanjun Guo).

   - Add _OSI("Darwin") support to the ACPI core (unfortunately, that
     can't really be done in a straightforward way) to prevent
     Thunderbolt from being turned off on Apple systems after boot (or
     after resume from system suspend) and rework the ACPI Smart Battery
     Subsystem (SBS) driver to work correctly with Apple platforms
     (Matthew Garrett and Andreas Noever).

   - ACPI LPSS (Low-Power Subsystem) driver update cleaning up the code,
     adding support for 133MHz I2C source clock on Intel Baytrail to it
     and making it avoid using UART RTS override with Auto Flow Control
     (Heikki Krogerus).

   - ACPI backlight updates removing the video_set_use_native_backlight
     quirk which is not necessary any more, making the code check the
     list of output devices returned by the _DOD method to avoid
     creating acpi_video interfaces that won't work and adding a quirk
     for Lenovo Ideapad Z570 (Hans de Goede, Aaron Lu and Stepan Bujnak)

   - New Win8 ACPI OSI quirks for some Dell laptops (Edward Lin)

   - Assorted ACPI code cleanups (Fabian Frederick, Rasmus Villemoes,
     Sudip Mukherjee, Yijing Wang, and Zhang Rui)

   - cpufreq core updates and cleanups (Viresh Kumar, Preeti U Murthy,
     Rasmus Villemoes)

   - cpufreq driver updates: cpufreq-cpu0/cpufreq-dt (driver name change
     among other things), ppc-corenet, powernv (Viresh Kumar, Preeti U
     Murthy, Shilpasri G Bhat, Lucas Stach)

   - cpuidle support for DT-based idle states infrastructure, new ARM64
     cpuidle driver, cpuidle core cleanups (Lorenzo Pieralisi, Rasmus
     Villemoes)

   - ARM big.LITTLE cpuidle driver updates: support for DT-based
     initialization and Exynos5800 compatible string (Lorenzo Pieralisi,
     Kevin Hilman)

   - Rework of the test_suspend kernel command line argument and a new
     trace event for console resume (Srinivas Pandruvada, Todd E Brandt)

   - Second attempt to optimize swsusp_free() (hibernation core) to make
     it avoid going through all PFNs which may be way too slow on some
     systems (Joerg Roedel)

   - devfreq updates (Paul Bolle, Punit Agrawal, Ãrjan Eide).

   - rockchip-io Adaptive Voltage Scaling (AVS) driver and AVS entry
     update in MAINTAINERS (Heiko Stübner, Kevin Hilman)

   - PM core fix related to clock management (Geert Uytterhoeven)

   - PM core's sysfs code cleanup (Johannes Berg)"

* tag 'pm+acpi-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (105 commits)
  ACPI / fan: printk replacement
  PM / clk: Fix crash in clocks management code if !CONFIG_PM_RUNTIME
  PM / Domains: Rename cpu_data to cpuidle_data
  cpufreq: cpufreq-dt: fix potential double put of cpu OF node
  cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
  PM / hibernate: Iterate over set bits instead of PFNs in swsusp_free()
  cpufreq: ppc-corenet: remove duplicate update of cpu_data
  ACPI / sleep: Rework the handling of ACPI GPE wakeup from suspend-to-idle
  PM / sleep: Rename platform suspend/resume functions in suspend.c
  PM / sleep: Export dpm_suspend_late/noirq() and dpm_resume_early/noirq()
  ACPICA: Introduce acpi_enable_all_wakeup_gpes()
  ACPICA: Clear all non-wakeup GPEs in acpi_hw_enable_wakeup_gpe_block()
  ACPI / video: check _DOD list when creating backlight devices
  PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h
  cpufreq: Replace strnicmp with strncasecmp
  cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec
  cpufreq: powernv: Set the pstate of the last hotplugged out cpu in policy->cpus to minimum
  cpufreq: Allow stop CPU callback to be used by all cpufreq drivers
  PM / devfreq: exynos: Enable building exynos PPMU as module
  PM / devfreq: Export helper functions for drivers
  ...
2014-10-09 16:07:43 -04:00
Thor Thayer
9c6de47d53 spi: dw: Initialize of_node to discover DT node children
The of_node element must be initialized to enable discovery of node
children which takes place in the of_register_spi_devices() function.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-08 21:12:47 +01:00
Rafael J. Wysocki
49a09c9ab0 Merge branch 'pm-domains'
* pm-domains: (32 commits)
  PM / Domains: Rename cpu_data to cpuidle_data
  PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h
  PM / Domains: Remove legacy API for adding devices through DT
  PM / Domains: Add genpd attach/detach callbacks
  PM / Domains: add debugfs listing of struct generic_pm_domain-s
  ACPI / PM: Convert acpi_dev_pm_detach() into a static function
  ARM: exynos: Move to generic PM domain DT bindings
  amba: Add support for attach/detach of PM domains
  spi: core: Convert to dev_pm_domain_attach|detach()
  mmc: sdio: Convert to dev_pm_domain_attach|detach()
  i2c: core: Convert to dev_pm_domain_attach|detach()
  drivercore / platform: Convert to dev_pm_domain_attach|detach()
  PM / Domains: Add APIs to attach/detach a PM domain for a device
  PM / Domains: Add generic OF-based PM domain look-up
  ACPI / PM: Assign the ->detach() callback when attaching the PM domain
  PM / Domains: Add a detach callback to the struct dev_pm_domain
  PM / domains: Spelling s/domian/domain/
  PM / domains: Keep declaration of dev_power_governors together
  PM / domains: Remove default_stop_ok() API
  drivers: sh: Leave disabling of unused PM domains to genpd
  ...
2014-10-07 01:18:12 +02:00
Mark Brown
a2285b8c75 Merge remote-tracking branch 'spi/topic/xilinx' into spi-next 2014-10-03 16:33:44 +01:00
Mark Brown
bab4d751f7 Merge remote-tracking branches 'spi/topic/pl022', 'spi/topic/pxa2xx', 'spi/topic/rspi', 'spi/topic/sh-msiof' and 'spi/topic/sirf' into spi-next 2014-10-03 16:33:42 +01:00
Mark Brown
899d81b974 Merge remote-tracking branches 'spi/topic/fsl-dspi', 'spi/topic/imx', 'spi/topic/mxs', 'spi/topic/omap-100k' and 'spi/topic/orion' into spi-next 2014-10-03 16:33:41 +01:00
Mark Brown
7020d76971 Merge remote-tracking branches 'spi/topic/davinci', 'spi/topic/doc', 'spi/topic/dw' and 'spi/topic/fsl' into spi-next 2014-10-03 16:33:39 +01:00
Mark Brown
1fc8450313 Merge remote-tracking branches 'spi/topic/bcm53xx', 'spi/topic/cadence', 'spi/topic/checkpatch' and 'spi/topic/clps711x' into spi-next 2014-10-03 16:33:37 +01:00
Mark Brown
613c44798f Merge remote-tracking branch 'spi/topic/dma-dep' into spi-next 2014-10-03 16:33:37 +01:00
Mark Brown
ad71f40a83 Merge remote-tracking branch 'spi/topic/core' into spi-next 2014-10-03 16:33:37 +01:00
Mark Brown
62d02e41ea Merge remote-tracking branch 'spi/fix/rockchip' into spi-linus 2014-10-03 16:33:35 +01:00
Michael Heimpold
a44619c31c spi: spi-mxs: fix a tiny typo in a comment
Signed-off-by: Michael Heimpold <mhei@heimpold.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-03 10:33:57 +01:00
Andy Shevchenko
f7477c2be8 spi: dw-mid: follow new DMAengine workflow
Though intel-mid-dma does not follow a new DMA workflow (*) let's prepare SPI
DW driver for that.

(*) The client is obliged to call dma_async_issue_pending() which starts the
actual transfers. Old DMA drivers do not follow this, since requirement was
introduced in the discussion of [1].

[1] http://www.spinics.net/lists/arm-kernel/msg125987.html

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-02 17:06:26 +01:00
Andy Shevchenko
2a28529944 spi: dw-mid: convert to use DMAengine wrappers
Instead of direct dereference to dmaengine callbacks we are going to use
DMAengine wrappers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-02 17:06:26 +01:00
Andy Shevchenko
15ee3be78b spi: dw-mid: change magic numbers to the constants
Instead of using magic numbers in the code we create a bit map definition of
the DMACR register and use it.

There is no functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-02 17:06:26 +01:00
Greg Ungerer
df59fa7f4b spi: orion: support armada extended baud rates
The Armada SoC family implementation of this SPI hardware module has
extended the configuration register to allow for a wider range of SPI
clock rates. Specifically the Serial Baud Rate Pre-selection bits in the
SPI Interface Configuration Register now also use bits 6 and 7 as well.

Modify the baud rate calculation to handle these differences for the
Armada case. Potentially a baud rate can be setup using a number of
different pre-scalar and scalar combinations. This code tries all
possible pre-scalar divisors (8 in total) to try and find the most
accurate set.

This change introduces (and documents) a new device tree compatible
device name "armada-370-spi" to support this.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-01 19:21:51 +01:00
Ulf Hansson
f48c767ce8 PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h
The commit 46420dd73b (PM / Domains: Add APIs to attach/detach a PM
domain for a device) started using errno values in pm.h header file.
It also failed to include the header for these, thus it caused
compiler errors.

Instead of including the errno header to pm.h, let's move the functions
to pm_domain.h, since it's a better match.

Fixes: 46420dd73b (PM / Domains: Add APIs to attach/detach a PM domain for a device)
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-30 01:16:44 +02:00
Xiubo Li
a310836004 spi: fsl: Sort include headers alphabetically
Sort all the include headers alphabetically for the freescale
spi drivers. If the inlcude headers sorted out of order, maybe
the best logical choice is to append new ones after the exist
ones, while this may create a lot of potential for duplicates
and conflicts for each diffenent changes will add new headers
in the same location.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-29 18:14:08 +01:00
Axel Lin
61d38b9a82 spi: bcm53xx: Add missing module information
Mainly to fix missing MODULE_LICENSE.
Also add MODULE_DESCRIPTION and MODULE_AUTHOR.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-26 09:08:10 +01:00
Axel Lin
933fc7b06c spi: bcm53xx: Fix module dependency
config SPI_BCM53XX needs to depend on BCMA_POSSIBLE and select BCMA.
This fixes below build error:
ERROR: "bcma_driver_unregister" [drivers/spi/spi-bcm53xx.ko] undefined!
ERROR: "__bcma_driver_register" [drivers/spi/spi-bcm53xx.ko] undefined!

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-26 09:08:09 +01:00
Addy Ke
a24e70c0ac spi/rockchip: fix bug that cause the failure to read data in DMA mode
In my test on RK3288-pinky board, if spi is enabled, it will begin to
read data from slave regardless of whether the DMA is ready. So we
need prepare DMA before spi is enable.

Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-09-25 14:14:44 +01:00
Alexander Stein
90f90bbb60 spi: fsl-dspi: Remove probe info message
Remove the probe info message which also has wrong output. No need to add
KERN_INFO to pr_info. Output was:
6Freescale DSPI master initialized

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-25 13:49:17 +01:00
Anders Berg
db4fa45ed3 spi: pl022: Add support for chip select extension
Add support for a extended PL022 which has an extra register for controlling up
to five chip select signals. This controller is found on the AXM5516 SoC.
Unfortunately the PrimeCell identification registers are identical to a
standard ARM PL022. To work around this, the peripheral ID must be overridden
in the device tree using the "arm,primecell-periphid" property with the value
0x000b6022.

Signed-off-by: Anders Berg <anders.berg@avagotech.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-24 10:25:52 +01:00
Xiubo Li
c7908a37ae spi: Fix possible ZERO_SIZE_PTR pointer dereferencing error.
Since we cannot make sure the 'n' will always be none zero here, and
then if either equal to zero, the kzalloc() will return ZERO_SIZE_PTR,
which equals to ((void *)16).

So this patch fix this with just doing the zero check before calling
kzalloc().

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-24 09:52:43 +01:00
Andy Shevchenko
c3c6e231d8 spi: dw: fix style of code in few places
Make comments be surrounded by spaces and move part of code to one line where
it suits 80 characters.

There is no functional changes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-24 09:50:33 +01:00
Andy Shevchenko
c3ce15bf2a spi: dw: introduce support of loopback mode
For testing purposes it's good to have a loopback mode enabled. The patch adds
necessary bits for that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-24 09:49:09 +01:00
Andy Shevchenko
8e45ef682c spi: dw-mid: terminate ongoing transfers at exit
Do full clean up at exit, means terminate all ongoing DMA transfers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-09-24 09:48:53 +01:00
Andy Shevchenko
b41583e729 spi: dw-mid: respect 8 bit mode
In case of 8 bit mode and DMA usage we end up with every second byte written as
0. We have to respect bits_per_word settings what this patch actually does.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-09-24 09:48:43 +01:00
Alexander Shiyan
a5b4b234e1 spi: clps711x: Migrate to the new clk subsystem
Currently clps711x arch have a fully functional CLK driver.
This patch migrates clps711x-spi driver to use the new CLK subsystem.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-24 09:40:24 +01:00
Ulf Hansson
676e7c257a spi: core: Convert to dev_pm_domain_attach|detach()
Previously only the ACPI PM domain was supported by the spi bus.

Let's convert to the common attach/detach functions for PM domains,
which currently means we are extending the support to include the
generic PM domain as well.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-22 15:57:40 +02:00
Kiran Padwal
73e3f1eb51 spi: pl022: Add missing error check for devm_kzalloc
Currently this driver is missing a check on the return value of devm_kzalloc,
which would cause a NULL pointer dereference in a OOM situation.

This patch adds a missing check.

Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-18 11:14:16 -07:00
Mika Westerberg
39d36536d4 spi/pxa2xx-pci: Add support for Intel Braswell
Instead of one port we have 3 ports and all of them can take advantage of
the shared DMA controller.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-18 11:54:07 +05:30
Mika Westerberg
b729bf3453 spi/pxa2xx: Don't use slave_id of dma_slave_config
That field has been deprecated in favour of getting the necessary
information from ACPI/DT.

However, we still need to deal systems that are PCI only (no ACPI to back
up). In order to support such systems, we allow the DMA filter function and
its corresponding parameter via pxa2xx_spi_master platform data. Then when
the pxa2xx_spi_dma_setup() doesn't find the channel via ACPI, it falls back
to use the given filter function.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-09-18 11:54:07 +05:30
Robin Gong
f62caccd12 spi: spi-imx: add DMA support
Enable DMA support on i.mx6. The read speed can increase from 600KB/s
to 1.2MB/s on i.mx6q. You can disable or enable dma function in dts.
If not set "dma-names" in dts, spi will use PIO mode. This patch only
validate on i.mx6, not i.mx5, but encourage ones to apply this patch
on i.mx5 since they share the same IP.

Note:
  Sometime, there is a weid data in rxfifo after one full tx/rx
transfer finish by DMA on i.mx6dl, so we disable dma functhion on
i.mx6dl.

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Robin Gong <b38343@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-17 11:36:11 -07:00
Mark Brown
94b0955ddd Merge remote-tracking branches 'spi/fix/davinci', 'spi/fix/dw', 'spi/fix/fsl', 'spi/fix/pl022', 'spi/fix/rockchip' and 'spi/fix/sirf' into spi-linus 2014-09-16 16:20:19 -07:00
Murali Karicheri
365a7bb32e spi: davinci: add support for adding delay between word's transmissions
This patch adds ability to configure delay between transmission of
words over SPI bus if it's required by SPI slave devices.

New optional SPI slave property:
- ti,spi-word-delay : delay between transmission of words
	(SPIFMTn.WDELAY, SPIDAT1.WDEL)

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-16 10:31:35 -07:00
Grygorii Strashko
6e7488f8f6 spi: davinci: remove empty function davinci_spi_cleanup
Remove empty function davinci_spi_cleanup().

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-16 10:30:10 -07:00
Grygorii Strashko
8936decdd9 spi: davinci: request cs_gpio's from probe
Now CS GPIOs are requested from struct spi_master.setup() callback
and that causes failures when Client SPI device is getting accessed
through SPIDEV driver. The failure happens, because .setup() callback
may be called many times from IOCTL handler and when it's called
second time gpio_request() will fail and return -EBUSY.

Hence, fix it by moving CS GPIOs requesting code in .probe().

Reported-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 09:25:46 -07:00
Andy Shevchenko
53288fe9bd spi: dw: don't use mrst prefix anymore
Since driver is used on other platforms and debugfs stuff would be useful there
as well let's substitute mrst_ by dw_ where it suits. Additionally let's use
SPI master device name when print registers dump.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 17:03:12 +01:00
Mark Brown
551f6a58d4 Merge branch 'topic/checkpatch' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-dw 2014-09-13 17:03:05 +01:00
Andy Shevchenko
197e96b4d8 spi: dw-mid: remove FSF address and update copyright
The FSF address is subject to change, thus remove it from the file. While here,
update a copyright line.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 17:01:57 +01:00
Andy Shevchenko
b89e9c87dd spi: dw-mid: remove redundant dmac member
Instead of using that member we prefer to use dma_dev which represents actual
struct device of the DMA device.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 17:01:57 +01:00
Andy Shevchenko
ea092455d7 spi: dw-mid: remove Moorestown support
The support of the Moorestown was removed [1] from kernel long time ago. This
is just a follow up of that change.

[1] http://www.spinics.net/lists/platform-driver-x86/msg02948.html

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 17:01:57 +01:00
Andy Shevchenko
fb57862ead spi: dw-mid: check that DMA was inited before exit
If the driver was compiled with DMA support, but DMA channels weren't acquired
by some reason, mid_spi_dma_exit() will crash the kernel.

Fixes: 7063c0d942 (spi/dw_spi: add DMA support)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 17:01:57 +01:00
Andy Shevchenko
05ed2aee3e spi: dw: remove FSF address
There is no need to keep FSF address in the head of the file. While here, fix
few typos in the header.

There is no functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13 17:01:56 +01:00
Roland Stigge
61e89e65e3 spi/pl022: Fix error message
This patch fixes an error message typo ("not" missing).

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-09-09 16:21:51 +01:00
Doug Anderson
62946172c8 spi/rockchip: Don't warn if SPI is busy but disabled
The reference manual from Rockchip claims this about the BSF (SPI Busy
Flag):
* 0 - SPI is idle or disabled
* 1 - SPI is actively transferring data

The above doesn't quite appear to be true.  Specifically I found the
busy bit set when SPI was disabled.  Let's change the WARN_ON() so we
only check the busy bit if the controller was enabled.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-04 23:54:11 +01:00
Doug Anderson
64bc0110f1 spi/rockchip: Fix the wait_for_idle() timeout
The wait_for_idle() could get unlucky and timeout too quickly.
Specifically, the old calculation was effectively:
  timeout = jiffies + 1;
  if (jiffies >= timeout) print warning;

From the above it should be obvious that if jiffies ticks in just the
wrong place then we'll have an effective timeout of 0.

Fix this by effectively changing the above ">=" to a ">".  That gives
us an extra jiffy to finish.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-04 23:54:11 +01:00
Qipan Li
9593e61582 spi: sirf: cleanup the indentation of marcos
let "#define" statement keep same indentation. the old code layout is
pretty ugly.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-04 23:39:26 +01:00
Qipan Li
810a58b025 spi: sirf: add fifo reset/start for cmd transfer
for command mode spi transfer, HW spec requires to do fifo reset work to
clear FIFO status.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-04 23:37:23 +01:00
Qipan Li
0021d97334 spi: sirf: fix 'cmd_transfer' function typos
unify 'cmd_transfer' like 'pio_transfer' and 'dma_transfer' as void
function, and also change left_rx_word according to transfer result.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-04 23:35:58 +01:00
Qipan Li
f2a08b4046 spi: sirf: enable RX_IO_DMA_INT interrupt
in spi interrupt handler, we need check RX_IO_DMA status to ensure
rx fifo have received the specify count data.

if not set, the while statement in spi isr function will keep loop,
at last, make the kernel hang.

[The code is actually there in the interrupt handler but apparently it
needs the interrupt unmasking so the handler sees the status -- broonie]

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-09-04 20:25:07 +01:00
Qipan Li
7850cdfc80 spi: sirf: correct spi gpio and hardware chipselect behaviour
the old codes check the cs-gpios, if the gpio number is 0 like:
<&gpio, 0, 0>, the driver will use the only hardware chipselect.

this is wrong because of_spi_register_master() can read property
cs-gpios from device node and set the spi master's cs number and
gpio cs automatically based on whether the cs-gpios is valid.

this patch fixes the beviour of CSR spi driver and move to a core
level supported way.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-04 20:20:15 +01:00
Jingoo Han
a2cea9831e spi: txx9: Fix checkpatch issue
Fix the following checkpatch warnings.

  Missing a blank line after declarations.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03 19:30:27 +01:00
Jingoo Han
327f5386d5 spi: tegra20-sflash: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: macros should not use a trailing semicolon
  WARNING: Missing a blank line after declarations

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03 19:30:27 +01:00
Jingoo Han
c19c8e7581 spi: tegra114: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: Missing a blank line after declarations

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03 19:30:26 +01:00
Jingoo Han
b8434048dd spi: orion: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: else is not generally useful after a break or return
  WARNING: Missing a blank line after declarations

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03 19:30:26 +01:00
Jingoo Han
fadcace703 spi: dw: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: debugfs_remove_recursive(NULL) is safe this check is probably not required
  WARNING: min() should probably be min_t(u32, rx_left, dw_readw(dws, DW_SPI_RXFLR))
  WARNING: else is not generally useful after a break or return
  WARNING: Missing a blank line after declarations
  WARNING: void function return statements are not generally useful

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03 19:30:26 +01:00
Jingoo Han
859c3377cc spi: davinci: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: Missing a blank line after declarations
  WARNING: quoted string split across lines

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03 19:30:25 +01:00
Jingoo Han
a7fa321945 spi: spi-mxs: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: Missing a blank line after declarations
  WARNING: Prefer kcalloc over kzalloc with multiply

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-02 17:34:35 +01:00
Jingoo Han
cdc67fa941 spi: xtensa-xtfpga: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: Missing a blank line after declarations

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-02 11:47:12 +01:00
Jingoo Han
175a3edcfd spi: ep93xx: Fix checkpatch issue
Fix the following checkpatch warnings.

  WARNING: Missing a blank line after declarations

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Mika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-02 11:47:12 +01:00
Axel Lin
a97c883a16 spi: dw: Don't use devm_kzalloc in master->setup callback
device_add() expects that any memory allocated via devm_* API is only
done in the device's probe function.

Fix below boot warning:
WARNING: CPU: 1 PID: 1 at drivers/base/dd.c:286 driver_probe_device+0x2b4/0x2f4()
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.16.0-10474-g835c90b-dirty #160
[<c0016364>] (unwind_backtrace) from [<c001251c>] (show_stack+0x20/0x24)
[<c001251c>] (show_stack) from [<c04eaefc>] (dump_stack+0x7c/0x98)
[<c04eaefc>] (dump_stack) from [<c0023d4c>] (warn_slowpath_common+0x78/0x9c)
[<c0023d4c>] (warn_slowpath_common) from [<c0023d9c>] (warn_slowpath_null+0x2c/0x34)
[<c0023d9c>] (warn_slowpath_null) from [<c0302c60>] (driver_probe_device+0x2b4/0x2f4)
[<c0302c60>] (driver_probe_device) from [<c0302d90>] (__device_attach+0x50/0x54)
[<c0302d90>] (__device_attach) from [<c0300e60>] (bus_for_each_drv+0x54/0x9c)
[<c0300e60>] (bus_for_each_drv) from [<c0302958>] (device_attach+0x84/0x90)
[<c0302958>] (device_attach) from [<c0301f10>] (bus_probe_device+0x94/0xb8)
[<c0301f10>] (bus_probe_device) from [<c03000c0>] (device_add+0x434/0x4fc)
[<c03000c0>] (device_add) from [<c0342dd4>] (spi_add_device+0x98/0x164)
[<c0342dd4>] (spi_add_device) from [<c03444a4>] (spi_register_master+0x598/0x768)
[<c03444a4>] (spi_register_master) from [<c03446b4>] (devm_spi_register_master+0x40/0x80)
[<c03446b4>] (devm_spi_register_master) from [<c0346214>] (dw_spi_add_host+0x1a8/0x258)
[<c0346214>] (dw_spi_add_host) from [<c0346920>] (dw_spi_mmio_probe+0x1d4/0x294)
[<c0346920>] (dw_spi_mmio_probe) from [<c0304560>] (platform_drv_probe+0x3c/0x6c)
[<c0304560>] (platform_drv_probe) from [<c0302a98>] (driver_probe_device+0xec/0x2f4)
[<c0302a98>] (driver_probe_device) from [<c0302d3c>] (__driver_attach+0x9c/0xa0)
[<c0302d3c>] (__driver_attach) from [<c0300f0c>] (bus_for_each_dev+0x64/0x98)
[<c0300f0c>] (bus_for_each_dev) from [<c0302518>] (driver_attach+0x2c/0x30)
[<c0302518>] (driver_attach) from [<c0302134>] (bus_add_driver+0xdc/0x1f4)
[<c0302134>] (bus_add_driver) from [<c03035c8>] (driver_register+0x88/0x104)
[<c03035c8>] (driver_register) from [<c030445c>] (__platform_driver_register+0x58/0x6c)
[<c030445c>] (__platform_driver_register) from [<c0700f00>] (dw_spi_mmio_driver_init+0x18/0x20)
[<c0700f00>] (dw_spi_mmio_driver_init) from [<c0008914>] (do_one_initcall+0x90/0x1d4)
[<c0008914>] (do_one_initcall) from [<c06d7d90>] (kernel_init_freeable+0x178/0x248)
[<c06d7d90>] (kernel_init_freeable) from [<c04e687c>] (kernel_init+0x18/0xfc)
[<c04e687c>] (kernel_init) from [<c000ecd8>] (ret_from_fork+0x14/0x20)

Reported-by: Thor Thayer <tthayer@opensource.altera.com>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-09-01 17:51:25 +01:00
Andy Shevchenko
5dc23c4421 spi: dw-pci: remove FSF address and update copyright
The FSF address is subject to change, thus remove it from the file. While here,
update a copyright line.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-01 11:29:03 +01:00
Andy Shevchenko
c95791b6a5 spi: dw-pci: provide platform specific data via driver_data
Instead of checking for device and vendor IDs inside probe function let's
provide a helper function via driver_data.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-01 11:29:03 +01:00
Andy Shevchenko
35f2d41364 spi: dw-pci: convert to use dev_pm_ops
Convert system PM callbacks to use dev_pm_ops. In addition remove the PCI calls
related to a power state since the bus code cares about this already.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-01 11:29:02 +01:00
Andy Shevchenko
ceb86de9d6 spi: dw-pci: apply pci_bar and re-use pci_name
Nevertheless pci_bar is 0 let's explicitly use it when map IO regions. While
here, use pci_name instead of dev_name.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-01 11:29:02 +01:00
Andy Shevchenko
fcf0af445b spi: dw-pci: move info message at the end of probe
Let's print info message when controller is found and properly initialized.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-01 11:29:02 +01:00
Axel Lin
d9f2674812 spi: fsl: Don't use devm_kzalloc in master->setup callback
device_add() expects that any memory allocated via devm_* API is only
done in the device's probe function.

Fix below boot warning:
[    3.092348] WARNING: at drivers/base/dd.c:286
[    3.096637] Modules linked in:
[    3.099697] CPU: 0 PID: 25 Comm: kworker/u2:1 Tainted: G W 3.16.1-s3k-drv-999-svn5771_knld-999 #158
[ 3.109610] Workqueue: deferwq deferred_probe_work_func
[    3.114736] task: c787f020 ti: c790c000 task.ti: c790c000
[    3.120062] NIP: c01df158 LR: c01df144 CTR: 00000000
[    3.124983] REGS: c790db30 TRAP: 0700   Tainted: G        W (3.16.1-s3k-drv-999-svn5771_knld-999)
[    3.134162] MSR: 00029032 <EE,ME,IR,DR,RI>  CR: 22002082 XER: 20000000
[    3.140703]
[    3.140703] GPR00: 00000001 c790dbe0 c787f020 00000044 00000054 00000308 c056da0e 20737069
[    3.140703] GPR08: 33323736 000ebfe0 00000308 000ebfdf 22002082 00000000 c046c5a0 c046c608
[    3.140703] GPR16: c046c614 c046c620 c046c62c c046c638 c046c648 c046c654 c046c68c c046c6c4
[    3.140703] GPR24: 00000000 00000000 00000003 c0401aa0 c0596638 c059662c c054e7a8 c7996800
[    3.170102] NIP [c01df158] driver_probe_device+0xf8/0x334
[    3.175431] LR [c01df144] driver_probe_device+0xe4/0x334
[    3.180633] Call Trace:
[    3.183093] [c790dbe0] [c01df144] driver_probe_device+0xe4/0x334 (unreliable)
[    3.190147] [c790dc10] [c01dd15c] bus_for_each_drv+0x7c/0xc0
[    3.195741] [c790dc40] [c01df5fc] device_attach+0xcc/0xf8
[    3.201076] [c790dc60] [c01dd6d4] bus_probe_device+0xb4/0xc4
[    3.206666] [c790dc80] [c01db9f8] device_add+0x270/0x564
[    3.211923] [c790dcc0] [c0219e84] spi_add_device+0xc0/0x190
[    3.217427] [c790dce0] [c021a79c] spi_register_master+0x720/0x834
[    3.223455] [c790dd40] [c021cb48] of_fsl_spi_probe+0x55c/0x614
[    3.229234] [c790dda0] [c01e0d2c] platform_drv_probe+0x30/0x74
[    3.234987] [c790ddb0] [c01df18c] driver_probe_device+0x12c/0x334
[    3.241008] [c790dde0] [c01dd15c] bus_for_each_drv+0x7c/0xc0
[    3.246602] [c790de10] [c01df5fc] device_attach+0xcc/0xf8
[    3.251937] [c790de30] [c01dd6d4] bus_probe_device+0xb4/0xc4
[    3.257536] [c790de50] [c01de9d8] deferred_probe_work_func+0x98/0xe0
[    3.263816] [c790de70] [c00305b8] process_one_work+0x18c/0x440
[    3.269577] [c790dea0] [c0030a00] worker_thread+0x194/0x67c
[    3.275105] [c790def0] [c0039198] kthread+0xd0/0xe4
[    3.279911] [c790df40] [c000c6d0] ret_from_kernel_thread+0x5c/0x64
[    3.285970] Instruction dump:
[    3.288900] 80de0000 419e01d0 3b7b0038 3c60c046 7f65db78 38635264 48211b99 813f00a0
[    3.296559] 381f00a0 7d290278 3169ffff 7c0b4910 <0f000000> 93df0044 7fe3fb78 4bfffd4d

Reported-by: leroy christophe <christophe.leroy@c-s.fr>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-09-01 10:24:52 +01:00
Geert Uytterhoeven
f59838a07a spi/drivers: Restrict COMPILE_TEST by HAS_DMA where needed
commit dd1053a93f ("spi/drivers: Enable build of drivers with
COMPILE_TEST") allows compile-testing drivers on platforms they're not
meant for.

However, adding "|| COMPILE_TEST" bypasses all other implicit dependencies
assumed by the platform dependencies before, like HAS_DMA.

If NO_DMA=y:

drivers/built-in.o: In function `atmel_spi_dma_unmap_xfer':
drivers/spi/spi-atmel.c:915: undefined reference to `dma_unmap_single'
drivers/spi/spi-atmel.c:918: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `atmel_spi_next_xfer_data':
drivers/spi/spi-atmel.c:690: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `atmel_spi_dma_map_xfer':
drivers/spi/spi-atmel.c:890: undefined reference to `dma_map_single'
drivers/spi/spi-atmel.c:893: undefined reference to `dma_mapping_error'
drivers/spi/spi-atmel.c:897: undefined reference to `dma_map_single'
drivers/spi/spi-atmel.c:900: undefined reference to `dma_mapping_error'
drivers/spi/spi-atmel.c:902: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `atmel_spi_probe':
drivers/spi/spi-atmel.c:1540: undefined reference to `dma_alloc_coherent'
drivers/spi/spi-atmel.c:1623: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `atmel_spi_remove':
drivers/spi/spi-atmel.c:1665: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `ep93xx_spi_dma_finish':
drivers/spi/spi-ep93xx.c:550: undefined reference to `dma_unmap_sg'
drivers/built-in.o: In function `ep93xx_spi_dma_prepare':
drivers/spi/spi-ep93xx.c:516: undefined reference to `dma_map_sg'
drivers/spi/spi-ep93xx.c:522: undefined reference to `dma_unmap_sg'
drivers/built-in.o: In function `omap2_mcspi_rx_dma':
drivers/spi/spi-omap2-mcspi.c:475: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `omap2_mcspi_txrx_dma':
drivers/spi/spi-omap2-mcspi.c:589: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `omap2_mcspi_transfer_one_message':
drivers/spi/spi-omap2-mcspi.c:1202: undefined reference to `dma_map_single'
drivers/spi/spi-omap2-mcspi.c:1204: undefined reference to `dma_mapping_error'
drivers/spi/spi-omap2-mcspi.c:1211: undefined reference to `dma_map_single'
drivers/spi/spi-omap2-mcspi.c:1213: undefined reference to `dma_mapping_error'
drivers/spi/spi-omap2-mcspi.c:1217: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `tegra_spi_deinit_dma_param':
drivers/spi/spi-tegra114.c:675: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `tegra_spi_copy_spi_rxbuf_to_client_rxbuf':
drivers/spi/spi-tegra114.c:415: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra114.c:440: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_spi_copy_client_txbuf_to_spi_txbuf':
drivers/spi/spi-tegra114.c:381: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra114.c:405: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_spi_start_dma_based_transfer':
drivers/spi/spi-tegra114.c:543: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_slink_deinit_dma_param':
drivers/spi/spi-tegra20-slink.c:705: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `tegra_slink_copy_spi_rxbuf_to_client_rxbuf':
drivers/spi/spi-tegra20-slink.c:427: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra20-slink.c:452: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_slink_copy_client_txbuf_to_spi_txbuf':
drivers/spi/spi-tegra20-slink.c:393: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra20-slink.c:417: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_slink_start_dma_based_transfer':
drivers/spi/spi-tegra20-slink.c:561: undefined reference to `dma_sync_single_for_cpu'

Add dependencies on HAS_DMA to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-08-31 13:59:48 +01:00
Mark Brown
2dbf591044 Merge remote-tracking branch 'spi/fix/sh-msiof' into spi-linus 2014-08-31 13:46:19 +01:00
Geert Uytterhoeven
cdcd565fa0 spi: sh-msiof: Fix transmit-only DMA transfers
Fix tx/rx mixup, which broke transmit-only transfers.

Introduced by commit 4240305f7cbdc7782aa8bc40cc702775d9ac0839
("spi: sh-msiof: Fix leaking of unused DMA descriptors").

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-31 13:41:46 +01:00
Mark Brown
360b2eaeb5 Merge remote-tracking branches 'spi/fix/au1550', 'spi/fix/davinci', 'spi/fix/doc', 'spi/fix/dw', 'spi/fix/omap-mcspi', 'spi/fix/pxa2xx', 'spi/fix/rockchip' and 'spi/fix/rspi' into spi-linus 2014-08-30 19:28:04 +01:00
Jingoo Han
050429a78b spi: bcm53xx: make local symbol static
Make local symbol static, because this is used only in this file.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-08-29 12:48:41 +01:00
Doug Anderson
5d1d150d7d spi/rockchip: Avoid accidentally turning off the clock
If our client is requesting a clock that is above the maximum clock
then the following division will result in 0:
  rs->max_freq / rs->speed

We'll then program 0 into the SPI_BAUDR register.  The Rockchip TRM
says: "If the value is 0, the serial output clock (sclk_out) is
disabled."

It's much better to end up with the fastest possible clock rather than
a clock that is off, so enforce a minimum value.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-08-29 12:07:38 +01:00
Geert Uytterhoeven
e221cc99be spi: sh-msiof: Add support for new R-Car Gen2 SoCs
Add support for MSIOF in:
  - r8a7792 (R-Car V2H)
  - r8a7793 (R-Car M2-N)
  - r8a7794 (R-Car E2)

r8a7791 is now called "R-Car M2-W".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-28 19:17:46 +01:00
Geert Uytterhoeven
6089af775a spi: rspi: Add support for new R-Car Gen2 SoCs
Add support for QSPI in:
  - r8a7792 (R-Car V2H)
  - r8a7793 (R-Car M2-N)
  - r8a7794 (R-Car E2)

r8a7791 is now called "R-Car M2-W".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-28 15:33:17 +01:00
Andy Shevchenko
08a707b878 spi: dw: fix kernel crash due to NULL pointer dereference
The obvious fix after the commit d9c73bb8a3 "spi: dw: add support for gpio
controlled chip select". This patch fixes the issue by using locally defined
temporary variable.

Fixes: d9c73bb8a3 (spi: dw: add support for gpio controlled chip select)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: <stable@vger.kernel.org>
2014-08-27 17:32:46 +01:00
Andy Shevchenko
c9d5d6fe16 spi: dw-pci: fix bug when regs left uninitialized
The commit 04f421e7 "spi: dw: use managed resources" changes drivers to use
managed functions, but seems wasn't properly tested in PCI case. The regs field
of struct dw_spi left uninitialized. Thus, kernel crashes when tries to access
to the SPI controller registers. This patch fixes the issue.

Fixes: 04f421e7 (spi: dw: use managed resources)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
2014-08-27 15:45:04 +01:00
Grygorii Strashko
3f2dad99f6 spi: davinci: fix SPI_NO_CS functionality
The driver should not touch CS lines if SPI_NO_CS flag is set.
This patch fixes it as this functionality was broken accidentally
by
commit a88e34ea21 ("spi: davinci: add support to configure gpio cs through dt").

Fixes: a88e34ea21 ("spi: davinci: add support to configure gpio cs through dt")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-21 13:08:56 -05:00
Addy Ke
0ac7a4904a spi/rockchip: fixup incorrect dma direction setting
Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-20 10:31:17 -05:00
Alan Cox
aca2636468 spi/pxa2xx: Add ACPI ID for Intel Braswell
The SPI host controller is the same as used in Baytrail, only the ACPI ID
is different so add this new ID to the list.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
2014-08-20 10:19:59 -05:00
Manuel Lauss
61a2381c7b spi: spi-au1550: fix build failure
Fix a build failure introduced with commit 30670539b8
(spi: au1550: Fix bug in deallocation of memory)

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-19 16:17:57 -05:00
Andy Shevchenko
468e0f47ed spi/pxa2xx-pci: remove unnecessary assignment
There is no need to unset driver data pointer at removal stage.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-19 16:11:36 -05:00
Mark Brown
38ec10f60d spi: Only call transfer_one() if we have buffers to transfer
Client drivers such as the ChomeOS EC driver sometimes use transfers with
no buffers and only a delay specified in order to allow a delay after the
assertion of /CS. Rather than require controller drivers handle this noop
case gracefully put checks in the core to ensure that we don't call into
the controller for such transfers.

Reported-by: Addy Ke <addy.ke@rock-chips.com>
Tested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-19 16:08:58 -05:00
Rafał Miłecki
0fc6a323e1 spi: bcm53xx: driver for SPI controller on Broadcom bcma SoC
Broadcom 53xx ARM SoCs use bcma bus that contains various cores (AKA
devices). If board has a serial flash, it's connected over SPI and the
bcma bus includes a SPI controller. Example log from such a board:
bus0: Found chip with id 53010, rev 0x00 and package 0x02
(...)
bus0: Core 18 found: SPI flash controller (manuf 0x4BF, id 0x50A, rev 0x01, class 0x0)

This patch adds a bcma driver for SPI core, it registers SPI master
controller and "bcm53xxspiflash" SPI device.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-19 11:30:55 -05:00
Xiubo Li
c99428d035 spi: fsl-dspi: Convert to use regmap framework's endianness method.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Acked-by: Chao Fu <b44548@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-18 09:41:54 -05:00
Chew, Chiau Ee
afa93c9017 spi/pxa2xx-pci: Add common clock framework support in PCI glue layer
SPI PXA2XX core layer has dependency on common clock framework
to obtain information on host supported clock rate. Thus, we
setup the clock device in the PCI glue layer to enable PCI mode
host pass in the clock rate information.

Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com>
Acked-by: Kweh, Hock Leong <hock.leong.kweh@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:19:50 -05:00
Michal Simek
9c0b8fd1a5 spi: xilinx: Remove .owner field for driver
There is no need to init .owner field.

Based on the patch from Peter Griffin <peter.griffin@linaro.org>
"mmc: remove .owner field for drivers using module_platform_driver"

This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is overriden in
platform_driver_register anyway."

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:15:47 -05:00
Geert Uytterhoeven
7a9f957b39 spi: sh-msiof: Fix transmit-only DMA transfers
Fix tx/rx mixup, which broke transmit-only transfers.

Introduced by commit 4240305f7cbdc7782aa8bc40cc702775d9ac0839
("spi: sh-msiof: Fix leaking of unused DMA descriptors").

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:30 -05:00
Geert Uytterhoeven
a5e7c719fe spi: sh-msiof: Return early in sh_msiof_dma_once() where possible
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:30 -05:00
Geert Uytterhoeven
a6be4de6a2 spi: sh-msiof: Add DT support to DMA setup
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:30 -05:00
Geert Uytterhoeven
52fba2b85d spi: sh-msiof: Configure DMA slave bus width
The new Renesas R-Car Gen2 DMA Controller driver (rcar-dmac) requires
explicit configuration of the DMA slave bus width.
Hardcode the DMA transfer size to 4 bytes, as MSIOF DMA is limited to
32-bit words.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:30 -05:00
Geert Uytterhoeven
e825b8dd2b spi: rspi: Add DT support to DMA setup
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:09 -05:00
Geert Uytterhoeven
a30b95a7d8 spi: rspi: Configure DMA slave bus width to 8 bit
The new Renesas R-Car Gen2 DMA Controller driver (rcar-dmac) requires
explicit configuration of the DMA slave bus width.
Hardcode the DMA transfer size to 1 byte for both directions, as that's
the only supported configuration (16-bit DMA support was removed in
commit 9c5de2c175 ("spi: rspi: Remove
unused 16-bit DMA support")).

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:09 -05:00
Geert Uytterhoeven
43937455c9 spi: rspi: Use devm_kasprintf()
Use the devm_kasprintf() helper function instead of open coding
error-prone buffer handling and string formatting.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:09 -05:00
Geert Uytterhoeven
d64b472678 spi: rspi: Remove unneeded semicolon
Introduced by commit 426ef76dd8 ("spi:
rspi: Add DT support").

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:14:09 -05:00
Geert Uytterhoeven
3819bc8752 spi: rspi: Fix leaking of unused DMA descriptors
If dmaengine_prep_slave_sg() or dmaengine_submit() fail, we may leak
unused DMA descriptors.

As per Documentation/dmaengine.txt, once a DMA descriptor has been
obtained, it must be submitted. Hence:
  - First prepare and submit all DMA descriptors,
  - Prepare the SPI controller for DMA,
  - Start DMA by calling dma_async_issue_pending(),
  - Make sure to call dmaengine_terminate_all() on all descriptors that
    haven't completed.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:13:53 -05:00
Geert Uytterhoeven
3e81b59208 spi: sh-msiof: Fix leaking of unused DMA descriptors
If dmaengine_prep_slave_sg() or dmaengine_submit() fail, we may leak
unused DMA descriptors.

As per Documentation/dmaengine.txt, once a DMA descriptor has been
obtained, it must be submitted. Hence:
  - First prepare and submit all DMA descriptors,
  - Prepare the SPI controller for DMA,
  - Start DMA by calling dma_async_issue_pending(),
  - Make sure to call dmaengine_terminate_all() on all descriptors that
    haven't completed.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:13:14 -05:00
Nick Krause
9f5b8b4f56 spi: omap-100k: Remove unused definitions
Remove unused definition which cause the following warnings

drivers/spi/spi-omap-100k.c:73:0: warning: "WRITE" redefined [enabled by default]
include/linux/fs.h:193:0: note: this is the location of the previous definition
drivers/spi/spi-omap-100k.c:74:0: warning: "READ" redefined [enabled by default]
include/linux/fs.h:192:0: note: this is the location of the previous definition

Signed-off-by: Nick Krause <xerofoiffy@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:12:14 -05:00
Michal Simek
e67f04c918 spi: cadence: Remove .owner field for driver
There is no need to init .owner field.

Based on the patch from Peter Griffin <peter.griffin@linaro.org>
"mmc: remove .owner field for drivers using module_platform_driver"

This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is overriden in
platform_driver_register anyway."

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-16 17:11:32 -05:00
Thierry Reding
2c67568903 spi: Add missing kerneldoc bits
These are all arguments or fields that got added without updating the
kerneldoc comments.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-13 12:12:44 +01:00
Jorge A. Ventura
3d0763c006 spi/omap-mcspi: Fix the spi task hangs waiting dma_rx
The spi hangs waiting the completion of omap2_mcspi_rx_callback.

Signed-off-by: Jorge A. Ventura <jorge.araujo.ventura@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
2014-08-11 19:55:51 +01:00
Linus Torvalds
44c916d58b ARM: SoC cleanups for 3.17
This merge window brings a good size of cleanups on various
 platforms. Among the bigger ones:
 
 * Removal of Samsung s5pc100 and s5p64xx platforms. Both of these have
   lacked active support for quite a while, and after asking around nobody
   showed interest in keeping them around. If needed, they could be
   resurrected in the future but it's more likely that we would prefer
   reintroduction of them as DT and multiplatform-enabled platforms
   instead.
 * OMAP4 controller code register define diet. They defined a lot of registers
   that were never actually used, etc.
 * Move of some of the Tegra platform code (PMC, APBIO, fuse, powergate)
   to drivers/soc so it can be shared with 64-bit code. This also converts them
   over to traditional driver models where possible.
 * Removal of legacy gpio-samsung driver, since the last users have been
   removed (moved to pinctrl)
 
 Plus a bunch of smaller changes for various platforms that sort of
 dissapear in the diffstat for the above. clps711x cleanups, shmobile
 header file refactoring/moves for multiplatform friendliness, some misc
 cleanups, etc.
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Merge tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Olof Johansson:
 "This merge window brings a good size of cleanups on various platforms.
  Among the bigger ones:

   - Removal of Samsung s5pc100 and s5p64xx platforms.  Both of these
     have lacked active support for quite a while, and after asking
     around nobody showed interest in keeping them around.  If needed,
     they could be resurrected in the future but it's more likely that
     we would prefer reintroduction of them as DT and
     multiplatform-enabled platforms instead.

   - OMAP4 controller code register define diet.  They defined a lot of
     registers that were never actually used, etc.

   - Move of some of the Tegra platform code (PMC, APBIO, fuse,
     powergate) to drivers/soc so it can be shared with 64-bit code.
     This also converts them over to traditional driver models where
     possible.

   - Removal of legacy gpio-samsung driver, since the last users have
     been removed (moved to pinctrl)

  Plus a bunch of smaller changes for various platforms that sort of
  dissapear in the diffstat for the above.  clps711x cleanups, shmobile
  header file refactoring/moves for multiplatform friendliness, some
  misc cleanups, etc"

* tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (117 commits)
  drivers: CCI: Correct use of ! and &
  video: clcd-versatile: Depend on ARM
  video: fix up versatile CLCD helper move
  MAINTAINERS: Add sdhci-st file to ARCH/STI architecture
  ARM: EXYNOS: Fix build breakge with PM_SLEEP=n
  MAINTAINERS: Remove Kirkwood
  ARM: tegra: Convert PMC to a driver
  soc/tegra: fuse: Set up in early initcall
  ARM: tegra: Always lock the CPU reset vector
  ARM: tegra: Setup CPU hotplug in a pure initcall
  soc/tegra: Implement runtime check for Tegra SoCs
  soc/tegra: fuse: fix dummy functions
  soc/tegra: fuse: move APB DMA into Tegra20 fuse driver
  soc/tegra: Add efuse and apbmisc bindings
  soc/tegra: Add efuse driver for Tegra
  ARM: tegra: move fuse exports to soc/tegra/fuse.h
  ARM: tegra: export apb dma readl/writel
  ARM: tegra: Use a function to get the chip ID
  ARM: tegra: Sort includes alphabetically
  ARM: tegra: Move includes to include/soc/tegra
  ...
2014-08-08 11:00:26 -07:00
Linus Torvalds
e669830526 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for 3.17.  It contains:

   - misc Cavium Octeon, BCM47xx, BCM63xx and Alchemy  updates
   - MIPS ptrace updates and cleanups
   - various fixes that will also go to -stable
   - a number of cleanups and small non-critical fixes.
   - NUMA support for the Loongson 3.
   - more support for MSA
   - support for MAAR
   - various FP enhancements and fixes"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits)
  MIPS: jz4740: remove unnecessary null test before debugfs_remove
  MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive
  MIPS: ZBOOT: implement stack protector in compressed boot phase
  MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFT
  MIPS: Bonito64: remove a duplicate define
  MIPS: Malta: initialise MAARs
  MIPS: Initialise MAARs
  MIPS: detect presence of MAARs
  MIPS: define MAAR register accessors & bits
  MIPS: mark MSA experimental
  MIPS: Don't build MSA support unless it can be used
  MIPS: consistently clear MSA flags when starting & copying threads
  MIPS: 16 byte align MSA vector context
  MIPS: disable preemption whilst initialising MSA
  MIPS: ensure MSA gets disabled during boot
  MIPS: fix read_msa_* & write_msa_* functions on non-MSA toolchains
  MIPS: fix MSA context for tasks which don't use FP first
  MIPS: init upper 64b of vector registers when MSA is first used
  MIPS: save/disable MSA in lose_fpu
  MIPS: preserve scalar FP CSR when switching vector context
  ...
2014-08-07 08:47:00 -07:00
Linus Torvalds
1325b6550a spi: Updates for v3.17
A quiet release, more bug fixes than anything else.  A few things do
 stand out though:
 
  - Updates to several drivers to move towards the standard GPIO chip
    select handling in the core.
  - DMA support for the SH MSIOF driver.
  - Support for Rockchip SPI controllers (their first mainline
    submission).
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Merge tag 'spi-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "A quiet release, more bug fixes than anything else.  A few things do
  stand out though:

   - updates to several drivers to move towards the standard GPIO chip
     select handling in the core.
   - DMA support for the SH MSIOF driver.
   - support for Rockchip SPI controllers (their first mainline
     submission)"

* tag 'spi-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (64 commits)
  spi: davinci: use spi_device.cs_gpio to store gpio cs per spi device
  spi: davinci: add support to configure gpio cs through dt
  spi/pl022: Explicitly truncate large bitmask
  spi/atmel: Fix pointer to int conversion warnings on 64 bit builds
  spi: davinci: fix to support more than 2 chip selects
  spi: topcliff-pch: don't hardcode PCI slot to get DMA device
  spi: orion: fix incorrect handling of cell-index DT property
  spi: orion: Fix error return code in orion_spi_probe()
  spi/rockchip: fix error return code in rockchip_spi_probe()
  spi/rockchip: remove redundant dev_err call in rockchip_spi_probe()
  spi/rockchip: remove duplicated include from spi-rockchip.c
  ARM: dts: fix the chip select gpios definition in the SPI nodes
  spi: s3c64xx: Update binding documentation
  spi: s3c64xx: use the generic SPI "cs-gpios" property
  spi: s3c64xx: Revert "spi: s3c64xx: Added provision for dedicated cs pin"
  spi: atmel: Use dmaengine_prep_slave_sg() API
  spi: topcliff-pch: Update error messages for dmaengine_prep_slave_sg() API
  spi: sh-msiof: Use correct device for DMA mapping with IOMMU
  spi: sh-msiof: Handle dmaengine_prep_slave_single() failures gracefully
  spi: rspi: Handle dmaengine_prep_slave_sg() failures gracefully
  ...
2014-08-05 16:18:13 -07:00
Mark Brown
fab6a0410d Merge remote-tracking branches 'spi/topic/sh', 'spi/topic/sh-msiof' and 'spi/topic/topcliff-pch' into spi-next 2014-08-04 17:21:16 +01:00
Mark Brown
0c18b7638a Merge remote-tracking branches 'spi/topic/orion', 'spi/topic/pl022', 'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/rspi' into spi-next 2014-08-04 17:21:12 +01:00
Mark Brown
7e5ad716b6 Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/efm32', 'spi/topic/fsl' and 'spi/topic/omap-uwire' into spi-next 2014-08-04 17:21:08 +01:00
Mark Brown
d1345c524e Merge remote-tracking branches 'spi/topic/adi-v3', 'spi/topic/atmel', 'spi/topic/cleanup' and 'spi/topic/davinci' into spi-next 2014-08-04 17:21:04 +01:00