This concerns gpio edge detection for GPIO IRQs used from
userspace for GPIO event listeners.
Trying to work out the right event if it's not sure that the
examined gpio actually moved is impossible.
Consider two gpios "gpioA" and "gpioB" that share an interrupt.
gpioA's irq should trigger on any edge, gpioB's on a falling edge.
If now the common irq fires and both gpio lines are high, there
are several possibilities that could have happend:
a) gpioA just had a low-to-high edge
b) gpioB just had a high-to-low-to-high spike
c) a combination of both a) and b)
While c) is unlikely (in most setups) a) and b) alone are bad
enough. Currently the code assumes case a) unconditionally and
doesn't report an event for gpioB. Note that even if there is no
irq sharing involved a spike for a gpio might not result in an
event if it's configured to trigger for a single edge only.
The only way to improve this is to drop support for interrupt
sharing. This way a spike results in an event for the right gpio
at least. Note that apart from dropping IRQF_SHARED this
effectively undoes commit df1e76f28f
("gpiolib: skip unwanted events, don't convert them to opposite edge").
This obviously breaks setups that rely on interrupt sharing,
but given that this cannot be reliable, this is probably an
acceptable trade-off.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[Assuming there are no users of interrupt sharing yet]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a GPIO driver so only include <linux/gpio/driver.h>.
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The SPI chipselects are assumed to be active low in the current
binding, so when we want to use GPIO descriptors and handle
the active low/high semantics in gpiolib, we need a special
parsing quirk to deal with this.
We check for the property "spi-cs-high" and if that is
NOT present we assume the CS line is active low.
If the line is tagged as active low in the device tree and
has no "spi-cs-high" property all is fine, the device
tree and the SPI bindings are in agreement.
If the line is tagged as active high in the device tree with
the second cell flag and has no "spi-cs-high" property we
enforce active low semantics (as this is the exception we can
just tag on the flag).
If the line is tagged as active low with the second cell flag
AND tagged with "spi-cs-high" the SPI active high property
takes precedence and we print a warning.
Cc: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Since this driver does not use the gpiolib irqchip helpers it will have to
allocate the irq resources and irq_en/disable itself.
Use the new gpiochip_req/relres_irq helpers to request/release all the
resources.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Ray Jui <rjui@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When using the gpiolib irqchip helpers install irq_enable/disable
hooks for the irqchip to ensure that gpiolib knows when the irq
is enabled or disabled, allowing drivers to disable the irq and then
use it as an output pin, and later switch the direction to input and
re-enable the irq.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
GPIO drivers call gpiochip_(un)lock_as_irq whenever they want to use a gpio
as an interrupt. This is done when the irq is requested and it marks the
gpio as in use by an interrupt.
This is problematic for cases where a gpio pin is used as an interrupt
pin, then, after the irq is disabled, is used as a regular gpio pin.
Currently it is not possible to do this other than by first freeing
the interrupt so gpiochip_unlock_as_irq is called, since an attempt to
switch the gpio direction for output will fail since gpiolib believes
that the gpio is in use for an interrupt and it does not know that it
the irq is actually disabled.
There are currently two drivers that would like to be able to do this:
the tda998x_drv.c driver where a regular gpio pin needs to be temporarily
reconfigured as an interrupt pin during CEC calibration, and the cec-gpio
driver where you want to configure the gpio pin as an interrupt while
waiting for traffic over the CEC bus, or as a regular pin when receiving or
transmitting a CEC message.
The solution is to add a new flag that is set when the irq is enabled,
and have gpiod_direction_output check for that flag.
We also add functions that drivers that do not use GPIOLIB_IRQCHIP
can call when they enable/disable the irq.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Centralize setting the irq_request/release_resources callbacks
in one function since we'll be adding more callbacks to that.
Also fix the removal of the callback overrides: this should
only be done if we actually installed our own callback there.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
GPIO drivers that do not use GPIOLIB_IRQCHIP can hook these into
the irq_request_resource and irq_release_resource callbacks of the
irq_chip so they correctly 'get' the module and lock the gpio line
for IRQ use.
This will simplify driver code.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The problem is that if port == ARRAY_SIZE() and "gc == &epg->gc[port]"
then that should be treated as invalid.
Fixes: fd935fc421 ("gpio: ep93xx: Do not pingpong irq numbers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Currently the while loop checks for the end of the array using
the size of egp->gc rather that the number of elements in the array,
so fix this. Also, perform the array size check first as stylistically
it is always good to bounds check on an array first before referencing
the array (in this case, we're just computing the address of an
element in an array so this is a moot point).
Fixes: fd935fc421 ("gpio: ep93xx: Do not pingpong irq numbers")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The gpiolib cannot deduce the fact that every line is output
by itself, implement a .get_direction() callback so we can
inspect this.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
It's nice to use BIT() macros rather than open coding the same.
It's good practice as sometimes people use BIT(31) and forget
that the constant must be cast unsigned long.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use the SPDX header to indicate the license for this driver.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a GPIO driver so include only <linux/gpio/driver.h>.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
It's nice to be able to read back the direction of the GPIO
line from the hardware so implement .get_direction() for
twl4030.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use the SPDX header to indicate the license for this driver.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a GPIO driver so include only <linux/gpio/driver.h>.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The TS5500 GPIO driver apparently supports platform data
without making any use of it whatsoever. Delete this code,
last chance to speak up if you think it is needed.
Cc: kernel@savoirfairelinux.com
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Cc: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a GPIO driver so include only <linux/gpio/driver.h>.
Cc: kernel@savoirfairelinux.com
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Cc: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The MXS driver was calling back into the GPIO API from
its irqchip. This is not very elegant, as we are a driver,
let's just shortcut back into the gpio_chip .get() function
instead.
This is a tricky case since the .get() callback is not in
this file, instead assigned by bgpio_init(). Calling the
function direcly in the gpio_chip is however the lesser
evil.
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Janusz Uzycki <j.uzycki@elproma.com.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
I'm tired of boilerplate, use the SPDX tag.
Acked-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
These are drivers so include only <linux/gpio/driver.h>.
Acked-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Sometimes we have empty banks within the GPIO block. This commit allows
proper handling of 0 width GPIO banks. We handle 0 width GPIO banks by
incrementing the bank and number of GPIOs, but not initializing them.
This will mean a call into the non-existent GPIOs will return an error.
Also remove "GPIO registered" dev print. This information is misleading
since the incremented banks and gpio_base do not reflect the actual GPIOs
that get initialized. We leave this information out since it is already
printed with dev_dbg.
Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The FTGPIO010 has a debounce timer or rather prescaler that
will affect interrupts fireing off the block. We can support
this to get proper debounce on e.g. keypresses.
Since the same prescaler is used across all GPIO lines of
the silicon block, we need to bail out if the prescaler is
already set and in use by another line.
If the prescaler is already set to what we need, fine, we
reuse it. This happens more often than not when the same
debounce time is set for several GPIO keys, so we support
that usecase easily with this code.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The GPIO silicon is clocked with a PCLK (peripheral clock)
on all systems, however not all platforms model it and include
it in e.g. the device tree, so add clock handling but make it
optional so we bail out safely if it is e.g. always on.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the corner case where the gpio driver probe fails, for whatever
reason, the suspend and resume handlers will still be called as they
have to be registered as syscore operations. This applies as well when
no probe was called while the driver has been built in the kernel.
Nicolas tracked this in :
https://bugzilla.kernel.org/show_bug.cgi?id=200905
Therefore, add a failsafe in these function, and test if a proper probe
succeeded and the driver is functional.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Reported-by: Nicolas Chauvet <kwizart@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pinctrl-ingenic driver is now handling the GPIO chips directly.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
GPIO hole is present in RZ/G1C SoC. Valid GPIO pins on bank3 are in the
range GP3_0 to GP3_16 and GP3_27 to GP3_29. The GPIO pins between GP3_17
to GP3_26 are unused. Add support for handling unused GPIO's.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We can quite easily switch banks/ports A and B to use
GPIOLIB_IRQCHIP which is code that will be more careful
about handling interrupt descriptors and use a proper
irqdomain for translating the IRQs. This cuts down some
code in favor of using the implementation inside
gpiolib.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This removes the callback into the gpiolib creating a
circular call to convert between GPIO numbers and IRQs
and pushes the whole business into the driver, just
using an array of IRQ bases for the three IRQ capable
ports.
This way we get rid of including <linux/gpio.h> that
no driver should include.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This simplifies and standardizes the AB IRQ handler by using
the for_each_set_bit() library function.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the IRQ-related functions, switch to using the hwirq
and port number found from the current struct gpio_chip *
As the lower 3 bits of the IRQ number is identical to the
lower 3 bits of the GPIO number we can cut some corners.
Call directly into the gpiochip to set up the direction
and read the input instead of using the consumer API.
This enabled us to cut the confusing irq_to_gpio() macro
that is a remnant of the old generic GPIO API as well.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
For setting debounce config we want to write an offset in
a per-gpiochip register, and we know which gpiochip we are
on. Instead of a roundtrip over the IRQ number, figure out
what port we are on for this GPIO chip, then index to the
right register and write the value.
This adds the ep93xx_gpio_port() that finds the port index
from a struct gpio_chip * that we can later exploit to
simplify more code.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The chained irq handler should call chained_irq_enter()
and chained_irq_exit() before/after handling the chained
IRQ.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is closer to what the variable (per bank) actually
means. We have the .gpio_to_irq() hook registered only
when this is true.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Instead of using a global variable, pass around the
struct gpio_chip * pointer and dereference to the state
container struct ep93xx_gpio as needed, like all other
drivers do.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The subject says it all. Cut down on boilerplate.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In order to clean up the driver I need to cut a few trees,
sorry, variable names, so I can see the forest, sorry driver
properly.
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
As a preparation for multiplatform support, this ensures
that the ep93xx gpio driver can be built without any of
the platform specific header files. We pass the IRQ numbers
as a resource now, and use the virtual mmio base from the
already existing resource, rather than relying on the
hardwired virtual address from the header file.
Some numbers are now hardcoded that came from macros
in the past, but for all I can tell, the driver already
relied on the specific values.
Cc: arm@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Instead of open coding logic for reading and writing GPIO lines,
use the generic GPIO library. Also switch to using the spinlock
from the generic GPIO to protect the registers.
Cc: linux-snps-arc@lists.infradead.org
Acked-by: Christian Ruppert <christian.ruppert@alitech.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Create a local struct device *dev helper variable to make the code
easier to read.
Most GPIO drivers use "np" (node pointer) rather than "dn" (device node)
to point to the device tree node. Let's follow this convention.
Cc: linux-snps-arc@lists.infradead.org
Acked-by: Christian Ruppert <christian.ruppert@alitech.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
- Add Cirrus Logic Madera Codec (CS47L35, CS47L85 and CS47L90/91) driver
- Add ChromeOS EC CEC driver
- Add ROHM BD71837 PMIC driver
- New Device Support
- Add support for Dialog Semi DA9063L PMIC variant to DA9063
- Add support for Intel Ice Lake to Intel-PLSS-PCI
- Add support for X-Powers AXP806 to AXP20x
- New Functionality
- Add support for USB Charging to the ChromeOS Embedded Controller
- Add support for HDMI CEC to the ChromeOS Embedded Controller
- Add support for HDMI CEC to Intel HDMI
- Add support for accessory detection to Madera devices
- Allow individual pins to be configured via DT' wlf,csnaddr-pd
- Provide legacy platform specific EEPROM/Watchdog commands; rave-sp
- Fix-ups
- Trivial renaming/spelling fixes; cros_ec, da9063-*
- Convert to Managed Resources (devm_*); da9063-*, ti_am335x_tscadc
- Transition to helper macros/functions; da9063-*
- Constify; kempld-core
- Improve error path/messages; wm8994-core
- Disable IRQs locally instead of relying on USB subsystem; dln2
- Remove unused code; rave-sp
- New exports; sec-core
- Bug Fixes
- Fix possible false I2C transaction error; arizona-core
- Fix declared memory area size; hi655x-pmic
- Fix checksum type; rave-sp
- Fix incorrect default serial port configuration: rave-sp
- Fix incorrect coherent DMA mask for sub-devices; sm501
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Merge tag 'mfd-next-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New Drivers:
- Add Cirrus Logic Madera Codec (CS47L35, CS47L85 and CS47L90/91) driver
- Add ChromeOS EC CEC driver
- Add ROHM BD71837 PMIC driver
New Device Support:
- Add support for Dialog Semi DA9063L PMIC variant to DA9063
- Add support for Intel Ice Lake to Intel-PLSS-PCI
- Add support for X-Powers AXP806 to AXP20x
New Functionality:
- Add support for USB Charging to the ChromeOS Embedded Controller
- Add support for HDMI CEC to the ChromeOS Embedded Controller
- Add support for HDMI CEC to Intel HDMI
- Add support for accessory detection to Madera devices
- Allow individual pins to be configured via DT' wlf,csnaddr-pd
- Provide legacy platform specific EEPROM/Watchdog commands; rave-sp
Fix-upsL
- Trivial renaming/spelling fixes; cros_ec, da9063-*
- Convert to Managed Resources (devm_*); da9063-*, ti_am335x_tscadc
- Transition to helper macros/functions; da9063-*
- Constify; kempld-core
- Improve error path/messages; wm8994-core
- Disable IRQs locally instead of relying on USB subsystem; dln2
- Remove unused code; rave-sp
- New exports; sec-core
Bug Fixes:
- Fix possible false I2C transaction error; arizona-core
- Fix declared memory area size; hi655x-pmic
- Fix checksum type; rave-sp
- Fix incorrect default serial port configuration: rave-sp
- Fix incorrect coherent DMA mask for sub-devices; sm501"
* tag 'mfd-next-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (60 commits)
mfd: madera: Add register definitions for accessory detect
mfd: sm501: Set coherent_dma_mask when creating subdevices
mfd: bd71837: Devicetree bindings for ROHM BD71837 PMIC
mfd: bd71837: Core driver for ROHM BD71837 PMIC
media: platform: cros-ec-cec: Fix dependency on MFD_CROS_EC
mfd: sec-core: Export OF module alias table
mfd: as3722: Disable auto-power-on when AC OK
mfd: axp20x: Support AXP806 in I2C mode
mfd: axp20x: Add self-working mode support for AXP806
dt-bindings: mfd: axp20x: Add "self-working" mode for AXP806
mfd: wm8994: Allow to configure CS/ADDR Pulldown from dts
mfd: wm8994: Allow to configure Speaker Mode Pullup from dts
mfd: rave-sp: Emulate CMD_GET_STATUS on device that don't support it
mfd: rave-sp: Add legacy watchdog ping command translation
mfd: rave-sp: Add legacy EEPROM access command translation
mfd: rave-sp: Initialize flow control and parity of the port
mfd: rave-sp: Fix incorrectly specified checksum type
mfd: rave-sp: Remove unused defines
mfd: hi655x: Fix regmap area declared size for hi655x
mfd: ti_am335x_tscadc: Fix struct clk memory leak
...
Core changes:
- Add a new API for explicitly naming GPIO consumers, when needed.
- Don't let userspace set values on input lines. While we do not
think anyone would do this crazy thing we better plug the hole
before someone uses it and think it's a nifty feature.
- Avoid calling chip->request() for unused GPIOs.
New drivers/subdrivers:
- The Mediatek MT7621 is supported which is a big win for OpenWRT
and similar router distributions using this chip, as it seems
every major router manufacturer on the planet has made products
using this chip:
https://wikidevi.com/wiki/MediaTek_MT7621
- The Tegra 194 is now supported.
- The IT87 driver now supports IT8786E and IT8718F super-IO
chips.
- Add support for Rockchip RK3328 in the syscon GPIO driver.
Driver changes:
- Handle the get/set_multiple() properly on MMIO chips with
inverted direction registers. We didn't have this problem
until a new chip appear that has get/set registers AND
inverted direction bits, OK now we handle it.
- A patch series making more error codes percolate upward
properly for different errors on gpiochip_lock_as_irq().
- Get/set multiple for the OMAP driver, accelerating these
multiple line operations if possible.
- A coprocessor interface for the Aspeed driver. Sometimes a few
GPIO lines need to be grabbed by a co-processor for doing
automated tasks, sometimes they are available as GPIO lines.
By adding an explicit API in this driver we make it possible
for the two line consumers to coexist. (This work was
made available on the ib-aspeed branch, which may be appearing
in other pull requests.)
- Implemented .get_direction() and open drain in the SCH311x
driver.
- Continuing cleanup of included headers in GPIO drivers.
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Merge tag 'gpio-v4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO changes for the v4.19 kernel cycle.
I don't know if anything in particular stands out. Maybe the Aspeed
coprocessor thing from Benji: Aspeed is doing baseboard management
chips (BMC's) for servers etc.
These Aspeed's are ARM processors that exist inside (I guess) Intel
servers, and they are moving forward to using mainline Linux in those.
This is one of the pieces of the puzzle to achive that. They are doing
OpenBMC, it's pretty cool: https://lwn.net/Articles/683320/
Summary:
Core changes:
- Add a new API for explicitly naming GPIO consumers, when needed.
- Don't let userspace set values on input lines. While we do not
think anyone would do this crazy thing we better plug the hole
before someone uses it and think it's a nifty feature.
- Avoid calling chip->request() for unused GPIOs.
New drivers/subdrivers:
- The Mediatek MT7621 is supported which is a big win for OpenWRT and
similar router distributions using this chip, as it seems every
major router manufacturer on the planet has made products using
this chip: https://wikidevi.com/wiki/MediaTek_MT7621
- The Tegra 194 is now supported.
- The IT87 driver now supports IT8786E and IT8718F super-IO chips.
- Add support for Rockchip RK3328 in the syscon GPIO driver.
Driver changes:
- Handle the get/set_multiple() properly on MMIO chips with inverted
direction registers. We didn't have this problem until a new chip
appear that has get/set registers AND inverted direction bits, OK
now we handle it.
- A patch series making more error codes percolate upward properly
for different errors on gpiochip_lock_as_irq().
- Get/set multiple for the OMAP driver, accelerating these multiple
line operations if possible.
- A coprocessor interface for the Aspeed driver. Sometimes a few GPIO
lines need to be grabbed by a co-processor for doing automated
tasks, sometimes they are available as GPIO lines. By adding an
explicit API in this driver we make it possible for the two line
consumers to coexist. (This work was made available on the
ib-aspeed branch, which may be appearing in other pull requests.)
- Implemented .get_direction() and open drain in the SCH311x driver.
- Continuing cleanup of included headers in GPIO drivers"
* tag 'gpio-v4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (80 commits)
gpio: it87: Add support for IT8613
gpio: it87: add support for IT8718F Super I/O.
gpiolib: Avoid calling chip->request() for unused gpios
gpio: tegra: Include the right header
gpio: mmio: Fix up inverted direction registers
gpio: xilinx: Use the right include
gpio: timberdale: Include the right header
gpio: tb10x: Use the right include
gpiolib: Fix of_node inconsistency
gpio: vr41xx: Bail out on gpiochip_lock_as_irq() error
gpio: uniphier: Bail out on gpiochip_lock_as_irq() error
gpio: xgene-sb: Don't shadow error code of gpiochip_lock_as_irq()
gpio: em: Don't shadow error code of gpiochip_lock_as_irq()
gpio: dwapb: Don't shadow error code of gpiochip_lock_as_irq()
gpio: bcm-kona: Don't shadow error code of gpiochip_lock_as_irq()
gpiolib: Don't shadow error code of gpiochip_lock_as_irq()
gpio: syscon: rockchip: add GRF GPIO support for rk3328
gpio: omap: Add get/set_multiple() callbacks
gpio: pxa: remove set but not used variable 'gpio_offset'
gpio-it87: add support for IT8786E Super I/O
...
- Revert two ACPICA commits that are not needed any more (Erik
Schmauss).
- Rework property graph support in the ACPI device properties
framework to make it behave more like the analogous DT code
and update the documentation of it (Sakari Ailus).
- Change the default ACPI device status after initialization
to ACPI_STA_DEFAULT instead of 0 (Hans de Goede).
- Add a special platform driver for enumerating multiple I2C devices
hooked up to the same object in the ACPI tables (Hans de Goede).
- Fix the ACPI battery driver to avoid reporting full capacity on
systems without support for that and clean it up (Hans de Goede,
Dmitry Rozhkov, Lucas Rangit Magasweran).
- Add two system wakeup quirks to the ACPI EC driver (Aaron Ma,
Mika Westerberg).
- Add the touchscreen on Dell Venue Pro 7139 to the list of "always
present" devices to make it work (Tristian Celestin).
- Revert a special tables handling quirk for Dell XPS 9570 and
Precision M5530 which is not needed any more (Kai Heng Feng).
- Add support for a new OEM _OSI string to allow system vendors to
work around issues with NVidia HDMI audio (Alex Hung).
- Prevent the ACPI button driver from reporting excessive system
wakeup events and clean it up (Ravi Chandra Sadineni, Randy Dunlap).
- Clean up two minor code style issues in the ACPI core and GHES
handling on ARM64 (Dongjiu Geng, John Garry, Tom Todd).
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Merge tag 'acpi-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These revert two ACPICA commits that are not needed any more, rework
the property graphs support in ACPI to be more aligned with the
analogous DT code, add some new quirks and remove one that isn't
needed any more, add a special platform driver to enumerate multiple
I2C devices hooked up to the same device object in the ACPI tables and
update the battery and button drivers.
Specifics:
- Revert two ACPICA commits that are not needed any more (Erik
Schmauss).
- Rework property graph support in the ACPI device properties
framework to make it behave more like the analogous DT code and
update the documentation of it (Sakari Ailus).
- Change the default ACPI device status after initialization to
ACPI_STA_DEFAULT instead of 0 (Hans de Goede).
- Add a special platform driver for enumerating multiple I2C devices
hooked up to the same object in the ACPI tables (Hans de Goede).
- Fix the ACPI battery driver to avoid reporting full capacity on
systems without support for that and clean it up (Hans de Goede,
Dmitry Rozhkov, Lucas Rangit Magasweran).
- Add two system wakeup quirks to the ACPI EC driver (Aaron Ma, Mika
Westerberg).
- Add the touchscreen on Dell Venue Pro 7139 to the list of "always
present" devices to make it work (Tristian Celestin).
- Revert a special tables handling quirk for Dell XPS 9570 and
Precision M5530 which is not needed any more (Kai Heng Feng).
- Add support for a new OEM _OSI string to allow system vendors to
work around issues with NVidia HDMI audio (Alex Hung).
- Prevent the ACPI button driver from reporting excessive system
wakeup events and clean it up (Ravi Chandra Sadineni, Randy
Dunlap).
- Clean up two minor code style issues in the ACPI core and GHES
handling on ARM64 (Dongjiu Geng, John Garry, Tom Todd)"
* tag 'acpi-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (34 commits)
platform/x86: Add ACPI i2c-multi-instantiate pseudo driver
ACPI / x86: utils: Remove status workaround from acpi_device_always_present()
ACPI / scan: Create platform device for fwnodes with multiple i2c devices
ACPI / scan: Initialize status to ACPI_STA_DEFAULT
ACPI / EC: Add another entry for Thinkpad X1 Carbon 6th
ACPI: bus: Fix a pointer coding style issue
arm64 / ACPI: clean the additional checks before calling ghes_notify_sea()
ACPI / scan: Add static attribute to indirect_io_hosts[]
ACPI / battery: Do not export energy_full[_design] on devices without full_charge_capacity
ACPI / EC: Use ec_no_wakeup on ThinkPad X1 Yoga 3rd
ACPI / battery: get rid of negations in conditions
ACPI / battery: use specialized print macros
ACPI / battery: reorder headers alphabetically
ACPI / battery: drop inclusion of init.h
ACPI: battery: remove redundant old_present check on insertion
ACPI: property: graph: Update graph documentation to use generic references
ACPI: property: graph: Improve graph documentation for port/ep numbering
ACPI: property: graph: Fix graph documentation
ACPI: property: Update documentation for hierarchical data extension 1.1
ACPI: property: Document key numbering for hierarchical data extension refs
...
