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Commit Graph

915391 Commits

Author SHA1 Message Date
Andy Shevchenko
672de52744 gpio: mb86s7x: Use devm_clk_get_optional() to get the input clock
Simplify the code which fetches the input clock by using
devm_clk_get_optional(). If no input clock is present
devm_clk_get_optional() will return NULL instead of an error
which matches the behavior of the old code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200512182623.54990-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-05-18 09:15:16 +02:00
Geert Uytterhoeven
582838ea5b gpiolib: Document that GPIO line names are not globally unique
gpiochip_set_desc_names() no longer rejects GPIO line name collisions.
Hence GPIO line names are not guaranteed to be globally unique.
In case of multiple GPIO lines with the same name, gpio_name_to_desc()
will return the first match found.

Update the comments for gpio_name_to_desc() and
gpiochip_set_desc_names() to match reality.

Fixes: f881bab038 ("gpio: keep the GPIO line names internal")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200511101828.30046-1-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-05-16 11:37:35 +02:00
Linus Walleij
ed43f2b4e7 intel-gpio for v5.8-1
* MSI support for Intel Merrifield
 * Refactor gpio-pch to be up-to-date with recent kernel APIs
 * Miscellaneous cleanups here and there
 
 The following is an automated git shortlog grouped by driver:
 
 ich:
  -  fix a typo
 
 merrifield:
  -  Better show how GPIO and IRQ bases are derived from hardware
  -  Switch over to MSI interrupts
 
 pch:
  -  Use in pch_irq_type() macros provided by IRQ core
  -  Refactor pch_irq_type() to avoid unnecessary locking
  -  Get rid of unneeded variable in IRQ handler
  -  Use BIT() and GENMASK() where it's appropriate
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Merge tag 'intel-gpio-v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/andy/linux-gpio-intel into devel

intel-gpio for v5.8-1

* MSI support for Intel Merrifield
* Refactor gpio-pch to be up-to-date with recent kernel APIs
* Miscellaneous cleanups here and there

The following is an automated git shortlog grouped by driver:

ich:
 -  fix a typo

merrifield:
 -  Better show how GPIO and IRQ bases are derived from hardware
 -  Switch over to MSI interrupts

pch:
 -  Use in pch_irq_type() macros provided by IRQ core
 -  Refactor pch_irq_type() to avoid unnecessary locking
 -  Get rid of unneeded variable in IRQ handler
 -  Use BIT() and GENMASK() where it's appropriate
2020-05-12 10:58:36 +02:00
Linus Walleij
29f9f8e1fc gpio updates for v5.8-rc1 - part1
- correct the IRQ type used in to_irq() in gpio-xgene-sb
 - add new item to the TODO list
 - support building gpio-pl061 as module
 - improve pull-up/down support on GPIO expanders in device-tree
 - several improvements in gpio-pca953x
 - emit a warning for too long GPIO line names
 - add MODULE_DEVICE_TABLE to gpio-tegra186
 - add support for new variant to gpio-f7188x
 - lsgpio can now display bias flags
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Merge tag 'gpio-updates-for-v5.8-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

gpio updates for v5.8-rc1 - part1

- correct the IRQ type used in to_irq() in gpio-xgene-sb
- add new item to the TODO list
- support building gpio-pl061 as module
- improve pull-up/down support on GPIO expanders in device-tree
- several improvements in gpio-pca953x
- emit a warning for too long GPIO line names
- add MODULE_DEVICE_TABLE to gpio-tegra186
- add support for new variant to gpio-f7188x
- lsgpio can now display bias flags
2020-05-09 00:33:32 +02:00
Kent Gibson
3831c051df tools: gpio: add bias flags to lsgpio
Add display of the bias flags.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-05-05 18:27:09 +02:00
Petteri Jokinen
17f96ee2b9 gpio-f7188x: Add GPIO support for F81865
Add GPIO support for Fintek F81865 chip.

Datasheet: http://www.hardwaresecrets.com/datasheets/F81865_V028P.pdf

Signed-off-by: Petteri Jokinen <petteri@kiho.fi>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-05-05 18:22:26 +02:00
Mian Yousaf Kaukab
fef2d3bb2d gpio: tegra186: export MODULE_DEVICE_TABLE
Export MODULE_DEVICE_TABLE since the driver can be built as a module.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-05-05 18:18:38 +02:00
Douglas Anderson
8d0910121b gpio: Make "offset" and "unsigned int", not just "unsigned"
When I copied the function prototypes from the GPIO header file into
my own driver, checkpatch yelled at me saying that I shouldn't use use
"unsigned" but instead should say "unsigned int".  Let's make the
header file use "unsigned int" so others who copy like I did won't get
yelled at.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200428172322.2.Iacb3c8152c3cf9015a91308678155a578b0cc050@changeid
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-29 14:18:58 +02:00
Douglas Anderson
36b5215436 gpio: Document proper return value for gpio drivers
The legacy defines GPIOF_DIR_XXX are only for consumers. Document the
proper ones.  Also: don't use "_XXX" since that's harder to find with
"git grep".  Just list both of the values.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200428172322.1.I396f351e364f3c09df7c7606e79abefb8682c092@changeid
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-29 14:15:25 +02:00
Uwe Kleine-König
6fdeb6cbe1 gpio: pca953x: drop unused parameters of pca953x_recalc_addr()
After the previous patch the two last parameters of
pca953x_recalc_addr() are unused and so can be dropped.

Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-29 13:20:28 +02:00
Uwe Kleine-König
bcf41dc480 gpio: pca953x: fix handling of automatic address incrementing
Some of the chips supported by the pca953x driver need the most
significant bit in the address word set to automatically increment the
address pointer on subsequent reads and writes (example: PCA9505). With
this bit unset the same register is read multiple times on a multi-byte
read sequence. Other chips must not have this bit set and autoincrement
always (example: PCA9555).

Up to now this AI bit was interpreted to be part of the address, which
resulted in inconsistent regmap caching when a register was written with
AI set and then read without it. This happened for the PCA9505 in
pca953x_gpio_set_multiple() where pca953x_read_regs() bulk read from the
cache for registers 0x8-0xc and then wrote to registers 0x88-0x8c. (Side
note: reading 5 values from offset 0x8 yiels OP0 5 times because AI must
be set to get OP0-OP4, which is another bug that is resolved here as a
by-product.) The same problem happens when calls to gpio_set_value() and
gpio_set_array_value() were mixed.

With this patch the AI bit is always set for chips that support it. This
works as there are no code locations that make use of the behaviour with
AI unset (for the chips that support it).

Note that the call to pca953x_setup_gpio() had to be done a bit earlier
to make the NBANK macro work.

The history of this bug is a bit complicated. Commit b32cecb46b
("gpio: pca953x: Extract the register address mangling to single
function") changed which chips and functions are affected. Commit
3b00691cc4 ("gpio: pca953x: hack to fix 24 bit gpio expanders") used
some duct tape to make the driver at least appear to work. Commit
4942723276 ("gpio: pca953x: Perform basic regmap conversion")
introduced the caching. Commit b4818afeac ("gpio: pca953x: Add
set_multiple to allow multiple bits to be set in one write.") introduced
the .set_multiple() callback which didn't work for chips that need the
AI bit which was fixed later for some chips in 8958262af3 ("gpio:
pca953x: Repair multi-byte IO address increment on PCA9575"). So I'm
sorry, I don't know which commit I should pick for a Fixes: line.

Tested-by: Marcel Gudert <m.gudert@eckelmann.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-29 13:19:51 +02:00
Andy Shevchenko
6f793485fc gpio: pca953x: Rewrite ->get_multiple() function
The commit 96d7c7b3e6 ("gpio: gpio-pca953x, Add get_multiple function")
basically did everything wrong from style and code reuse perspective, i.e.
- it didn't utilize existing PCA953x internal helpers
- it didn't utilize bitmap API
- it misses the point that ilog2(), besides that BANK_SFT is useless,
  can be used in macros
- it has indentation issues.

Rewrite the function completely.

Cc: Paul Thomas <pthomas8589@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-29 13:19:38 +02:00
Dejin Zheng
dc5c143937 gpio: mm-lantiq: Fix small typo
Fix a spelling typo in gpio-mm-lantiq.c by codespell
s/dont/don't/

Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200424154103.10311-3-zhengdejin5@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 22:41:25 +02:00
Wei Yongjun
66d8ad67aa gpio: mlxbf2: fix return value check in mlxbf2_gpio_get_lock_res()
In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20200427110829.154785-1-weiyongjun1@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 16:11:16 +02:00
Dejin Zheng
1c12857c67 gpio: ftgpio010: Fix small typo
Fix a spelling typo in gpio-ftgpio010.c by codespell
s/desireable/desirable/

Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200424154103.10311-2-zhengdejin5@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 15:50:28 +02:00
Geert Uytterhoeven
a5e93436e1 gpiolib: Rename "chip" variables to "gc" in core header file
Consistently use "gc" for "struct gpio *" variables.

This follows the spirit of commit a0b66a7378 ("gpio: Rename
variable in core APIs").

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200424141517.11582-1-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 15:49:20 +02:00
Geert Uytterhoeven
262b901166 gpiolib: Improve kernel messages
Simplify the printing of kernel messages and make the messages more
accurate by using the most appropriate {dev,chip,gpiod}_*() helpers.

Sample impact:

    -gpiochip_setup_dev: registered GPIOs 496 to 511 on device: gpiochip0 (e6050000.gpio)
    +gpio gpiochip0: registered GPIOs 496 to 511 on e6050000.gpio

    -no flags found for gpios
    +gpio-953 (?): no flags found for gpios

    -GPIO line 355 (PCIE/SATA switch) hogged as output/low
    +gpio-355 (PCIE/SATA switch): hogged as output/low

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200424141432.11400-1-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 15:48:16 +02:00
Andy Shevchenko
1475b6293a gpio: dwapb: Amend indentation in some cases
In some cases indentation makes code harder to read. Amend indentation
in those cases despite of lines go a bit over 80 character limit.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Cc: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200422110654.23442-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 14:52:51 +02:00
Andy Shevchenko
1afbc80c3d gpio: dwapb: Get rid of unnecessary conjunction over 32-bit value
When we mask interrupts before sleep, there is no need to have a conjunction
with 0xffffffff since the accepted by dwapb_write() value is 32-bit.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Cc: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200422110654.23442-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-28 14:52:51 +02:00
Stephen Boyd
9784c9963f gpiolib: devprop: Warn if gpio-line-names is too long
Some DT authors (including myself) have messed up the length of
gpio-line-names and made it longer than it should be. Add a warning here
so that developers can figure out that they've messed up their DT and
should fix it.

Cc: Alexandru M Stan <amstan@chromium.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-24 09:10:01 +02:00
YueHaibing
9f676e5313 gpio: mlxbf2: remove unused including <linux/version.h>
Remove including <linux/version.h> that don't need it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200408070832.137037-1-yuehaibing@huawei.com
Acked-by: Asmaa Mnebhi <Asmaa@mellanox.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:40:58 +02:00
Andy Shevchenko
4c2b54f73a gpio: dwapb: Split out dwapb_get_irq() helper
Split out dwapb_get_irq() helper for better readability and maintenance.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-13-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
c59042ed89 gpio: dwapb: Drop of_match_ptr() & ACPI_PTR() calls
Since we always have a table of IDs compiled in, there is no use
for of_match_ptr() nor ACPI_PTR() call. Besides that it brings
a warning (depending on configuration):

.../gpio-dwapb.c:638:34: warning: ‘dwapb_of_match’ defined but not used [-Wunused-const-variable=]
  638 | static const struct of_device_id dwapb_of_match[] = {
      |                                  ^~~~~~~~~~~~~~

Get rid of them for good.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-12-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
4f344e86c7 gpio: dwapb: Drop bogus BUG_ON()s
There is no case when no context is provided in the ->suspend() and
->resume() hooks. Moreover, BUG_ON() is harmful to user and makes kernel
inoperable after the crash. Drop the BUG_ON()s for good.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-11-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
48ce805683 gpio: dwapb: Switch to more usual pattern of RMW in dwapb_gpio_set_debounce()
More usual pattern is to prepare value and then write it in a single place.
Switch code in dwapb_gpio_set_debounce() to it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-10-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
d31275a9dc gpio: dwapb: Convert to use IRQ core provided macros
IRQ core provides macros such as IRQ_RETVAL().
Convert code to use them.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-9-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
9826bbe1fe gpio: dwapb: Use device_get_match_data() to simplify code
Use device_get_match_data() here to simplify the code a bit.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-8-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
e092bc5044 gpio: dwapb: Convert to use irqd_to_hwirq()
Convert to use irqd_to_hwirq() instead of direct access to the hwirq member.
Also amend the type of the hwirq holding variable to be irq_hw_number_t.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Cc: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-7-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:06 +02:00
Andy Shevchenko
43296bf22e gpio: dwapb: Deduplicate IRQ resource management
GPIO library provides default IRQ resource management hooks,
there is no need to repeat this in the individual driver.

Remove them for good.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:05 +02:00
Andy Shevchenko
f9754c7970 gpio: dwapb: set default handler to be handle_bad_irq()
We switch the default handler to be handle_bad_irq() instead of
handle_level_irq(), though for now apply it later in the code,
to make the difference between IRQ chips more visible.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:05 +02:00
Andy Shevchenko
9b0aef32c7 gpio: dwapb: Use chained IRQ prologue and epilogue
Refactor IRQ handler in order to enter and exit chained IRQ by using
respective prologue and epilogue calls.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:05 +02:00
Andy Shevchenko
038aa1f0ab gpio: dwapb: Refactor IRQ handler to use bit operations
Refactor IRQ handler in order to use for_each_set_bit() helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:05 +02:00
Andy Shevchenko
c58220cba2 gpio: dwapb: Append MODULE_ALIAS for platform driver
The commit 3d2613c428
  ("GPIO: gpio-dwapb: Enable platform driver binding to MFD driver")
introduced a use of the platform driver but missed to add the following line
to it:
  MODULE_ALIAS("platform:gpio-dwapb");

Add this to get driver loaded automatically if platform device is registered.

Fixes: 3d2613c428 ("GPIO: gpio-dwapb: Enable platform driver binding to MFD driver")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200415141534.31240-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:30:05 +02:00
Serge Semin
a26fa4b5d3 MAINTAINERS: Add Segey Semin to maintainers of DW APB GPIO driver
Add myself as a co-maintainer of the Synopsis DesignWare APB GPIO driver.

Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Hoan Tran <hoan@os.amperecomputing.com>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-gpio@vger.kernel.org
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200323195401.30338-7-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:29:55 +02:00
Serge Semin
5c544c92d6 gpio: dwapb: Add debounce reference clock support
Aside from the APB reference clock DW GPIO controller can have a
dedicated clock connected to setup a debounce time interval for
GPIO-based IRQs. Since this functionality is optional the corresponding
clock source is also optional. Due to this lets handle the debounce
clock in the same way as it has been developed for the APB reference
clock, but using the bulk request/enable-disable methods.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200323195401.30338-6-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:29:41 +02:00
Serge Semin
3ea8094c3b gpio: dwapb: Use optional-clocks interface for APB ref-clock
The common clocks kernel framework provides a generic way to use
an optional reference clock sources. If it's utilized there is no
need in checking whether the clock descriptor pointer is actually a
negative error at the moment of the prepare/unprepare clocks method
calling. So if the corresponding clock source is provided, then
getting an error shall actually terminate the device probe procedure.
If it isn't specified then the driver shall proceed with further
initializations.

We'll use the optional clocks getting method to handle the APB reference
clock, which can be provided for instance in the device of-node with
"bus" clock-name.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200323195401.30338-5-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:29:21 +02:00
Serge Semin
c55812afd3 dt-bindings: gpio: Add Sergey Semin to DW APB GPIO driver maintainers
Seeing Hoan has been silent for a long time Linus suggested to me
to be also maintaining the driver. This patch adds myself to the list
of maintainers in the DT schema of the driver.

Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Hoan Tran <hoan@os.amperecomputing.com>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: https://lore.kernel.org/r/20200323195401.30338-4-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:29:10 +02:00
Serge Semin
4f18093743 dt-bindings: gpio: Add DW GPIO debounce clock property
Port A of the DW GPIO controller may optionally have a debounce
logic enabled if it was synthesized with that functionality enabled.
In this case a dedicated reference clock should be declared in the
node with corresponding "db" name presented in the clock-names
property.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: https://lore.kernel.org/r/20200323195401.30338-3-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:28:57 +02:00
Serge Semin
657a06df99 dt-bindings: gpio: Convert snps,dw-apb-gpio to DT schema
Modern device tree bindings are supposed to be created as YAML-files
in accordance with DT schema. This commit replaces Synopsys DW GPIO
legacy bare text binding with YAML file. As before the binding file
states that the corresponding dts node is supposed to be compatible
with generic DW I2C controller indicated by the "snps,dw-apb-gpio"
compatible string and to provide a mandatory registers memory range.
It may also have an optional clock and reset phandle references.

There must be specified at least one subnode with
"snps,dw-apb-gpio-port" compatible string indicating the GPIO port,
which would actually export the GPIO controller functionality. Such
nodes should have traditional GPIO controller properties together
with optional interrupt-controller attributes if the corresponding
controller was synthesized to detect and report the input values
change to the parental IRQ controller.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200323195401.30338-2-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 12:28:32 +02:00
Bartosz Golaszewski
aa58a21ae3 gpio: pca953x: disable regmap locking
This driver uses its own locking but regmap silently uses a mutex for
all operations too. Add the option to disable locking to the regmap
config struct.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-17 08:25:29 +02:00
Andy Shevchenko
7e73aa90a3 gpio: merrifield: Better show how GPIO and IRQ bases are derived from hardware
It's a bit hard to realize what the BAR1 is for and what is the layout
of the data in it. Be slightly more verbose to better show how GPIO and
IRQ bases are derived from the hardware.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 20:41:06 +03:00
Andy Shevchenko
6b1c7837af gpio: merrifield: Switch over to MSI interrupts
Some devices may support MSI interrupts. Let's at least try to use them
in platforms that provide MSI capability.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 20:41:06 +03:00
Andy Shevchenko
5376b0b312 gpio: pch: Use in pch_irq_type() macros provided by IRQ core
Use in pch_irq_type() the macros provided by IRQ core for IRQ type.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 20:40:14 +03:00
Andy Shevchenko
368b843601 gpio: pch: Refactor pch_irq_type() to avoid unnecessary locking
When type is not supported there is no need to lock and check.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 20:40:14 +03:00
Andy Shevchenko
5a4245de48 gpio: pch: Get rid of unneeded variable in IRQ handler
There is no need to have an additional variable in IRQ handler. We may simple
rely on the fact of having non-zero register value we read from the hardware.

While here, drop repetitive messages in time critical function.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 20:40:14 +03:00
Andy Shevchenko
5c85418ab3 gpio: pch: Use BIT() and GENMASK() where it's appropriate
Use BIT() and GENMASK() where it's appropriate.
At the same time drop it where it's not appropriate.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2020-04-16 20:40:14 +03:00
Paul Thomas
96d7c7b3e6 gpio: gpio-pca953x, Add get_multiple function
Implement a get_multiple function for gpio-pca953x. If a driver
leaves get_multiple unimplemented then gpio_chip_get_multiple()
in gpiolib.c takes care of it by calling chip->get() as needed.
For i2c chips this is very inefficient. For example if you do an
8-bit read then instead of a single i2c transaction there are
8 transactions reading the same byte!

Signed-off-by: Paul Thomas <pthomas8589@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-16 15:20:40 +02:00
Hans de Goede
04fd1ca779 gpiolib: acpi: Add missing __init(const) markers to initcall-s
The gpiolib ACPI code uses 2 initcall-s and the called function
(and used DMI table) is missing __init(const) markers.

This commit fixes this freeing up some extra memory once the kernel
has completed booting.

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200325103956.109284-2-hdegoede@redhat.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-04-16 09:34:03 +02:00
Adam Ford
ea06a482a4 gpiolib: of: improve gpiolib-of support of pull up/down on expanders
When using GPIO expanders attached to I2C ports, their set_config function
needs to be passed a config setting which contains options to enable pull
up or pull down bias feature.  In order to set this config properly,
the gpio parser needs to handle GPIO_PULL_UP and GPIO_PULL_DOWN.

This patch enables the flags corresponding to GPIO_PULL_UP and
GPIO_PULL_DOWN.

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-15 13:20:00 +02:00
Rob Herring
616844408d gpio: pl061: Support building as module
Enable building the PL061 GPIO driver as a module.

This does change the initcall level when built-in. This shouldn't be a
problem as any user should support deferred probe by now. A scan of DT
based platforms at least didn't reveal any users that would be a
problem.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-04-14 16:23:46 +02:00