Commit Graph

141 Commits

Author SHA1 Message Date
Gustavo A. R. Silva df561f6688 treewide: Use fallthrough pseudo-keyword
Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-23 17:36:59 -05:00
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
Hans de Goede 0c625ccfe6 gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 CHT + AXP288 model
There are at least 3 models of the HP x2 10 models:

Bay Trail SoC + AXP288 PMIC
Cherry Trail SoC + AXP288 PMIC
Cherry Trail SoC + TI PMIC

Like on the other HP x2 10 models we need to ignore wakeup for ACPI GPIO
events on the external embedded-controller pin to avoid spurious wakeups
on the HP x2 10 CHT + AXP288 model too.

This commit adds an extra DMI based quirk for the HP x2 10 CHT + AXP288
model, ignoring wakeups for ACPI GPIO events on the EC interrupt pin
on this model. This fixes spurious wakeups from suspend on this model.

Fixes: aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism")
Reported-and-tested-by: Marc Lehmann <schmorp@schmorp.de>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200302111225.6641-4-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-03-24 10:06:54 +01:00
Hans de Goede 0e91506ba0 gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 BYT + AXP288 model
Commit aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option +
quirk mechanism") was added to deal with spurious wakeups on one specific
model of the HP x2 10 series. In the mean time I have learned that there
are at least 3 different HP x2 10 models:

Bay Trail SoC + AXP288 PMIC
Cherry Trail SoC + AXP288 PMIC
Cherry Trail SoC + TI PMIC

And the original quirk is only correct for (and only matches the)
Cherry Trail SoC + TI PMIC model.

The Bay Trail SoC + AXP288 PMIC model has different DMI strings, has
the external EC interrupt on a different GPIO pin and only needs to ignore
wakeups on the EC interrupt, the INT0002 device works fine on this model.

This commit adds an extra DMI based quirk for the HP x2 10 BYT + AXP288
model, ignoring wakeups for ACPI GPIO events on the EC interrupt pin
on this model. This fixes spurious wakeups from suspend on this model.

Fixes: aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200302111225.6641-3-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-03-11 15:55:20 +01:00
Hans de Goede 2ccb21f551 gpiolib: acpi: Rework honor_wakeup option into an ignore_wake option
Commit aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option +
quirk mechanism") was added to deal with spurious wakeups on one specific
model of the HP x2 10 series.

The approach taken there was to add a bool controlling wakeup support for
all ACPI GPIO events. This was sufficient for the specific HP x2 10 model
the commit was trying to fix, but in the mean time other models have
turned up which need a similar workaround to avoid spurious wakeups from
suspend, but only for one of the pins on which the ACPI tables request
ACPI GPIO events.

Since the honor_wakeup option was added to be able to ignore wake events,
the name was perhaps not the best, this commit renames it to ignore_wake
and changes it to a string with the following format:
gpiolib_acpi.ignore_wake=controller@pin[,controller@pin[,...]]

This allows working around spurious wakeup issues on a per pin basis.

This commit also reworks the existing quirk for the HP x2 10 so that
it functions as before.

Note:
-This removes the honor_wakeup parameter. This has only been upstream for
 a short time and to the best of my knowledge there are no users using
 this module parameter.

-The controller@pin[,controller@pin[,...]] syntax is based on an existing
 kernel module parameter using the same controller@pin format. That version
 uses ';' as separator, but in practice that is problematic because grub2
 cannot handle this without taking special care to escape the ';', so here
 we are using a ',' as separator instead which does not have this issue.

Fixes: aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200302111225.6641-2-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-03-11 15:55:20 +01:00
Hans de Goede efaa87fa09 gpiolib: acpi: Correct comment for HP x2 10 honor_wakeup quirk
Commit aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option +
quirk mechanism") added a quirk for some models of the HP x2 10 series.

There are 2 issues with the comment describing the quirk:
1) The comment claims the DMI quirk applies to all Cherry Trail based HP x2
   10 models. In the mean time I have learned that there are at least 3
   models of the HP x2 10 models:

   Bay Trail SoC + AXP288 PMIC
   Cherry Trail SoC + AXP288 PMIC
   Cherry Trail SoC + TI PMIC

   And this quirk's DMI matches only match the Cherry Trail SoC + TI PMIC
   SoC, which is good because we want a slightly different quirk for the
   others. This commit updates the comment to make it clear that the quirk
   is only for the Cherry Trail SoC + TI PMIC models.

2) The comment says that it is ok to disable wakeup on all ACPI GPIO event
   handlers, because there is only the one for the embedded-controller
   events. This is not true, there also is a handler for the special
   INT0002 device which is related to USB wakeups. We need to also disable
   wakeups on that one because the device turns of the USB-keyboard built
   into the dock when closing the lid. The XHCI controller takes a while
   to notice this, so it only notices it when already suspended, causing
   a spurious wakeup because of this. So disabling wakeup on all handlers
   is the right thing to do, but not because there only is the one handler
   for the EC events. This commit updates the comment to correctly reflect
   this.

Fixes: aa23ca3d98 ("gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200302111225.6641-1-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-03-11 15:55:19 +01:00
Hans de Goede aa23ca3d98 gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism
On some laptops enabling wakeup on the GPIO interrupts used for ACPI _AEI
event handling causes spurious wakeups.

This commit adds a new honor_wakeup option, defaulting to true (our current
behavior), which can be used to disable wakeup on troublesome hardware
to avoid these spurious wakeups.

This is a workaround for an architectural problem with s2idle under Linux
where we do not have any mechanism to immediately go back to sleep after
wakeup events, other then for embedded-controller events using the standard
ACPI EC interface, for details see:
https://lore.kernel.org/linux-acpi/61450f9b-cbc6-0c09-8b3a-aff6bf9a0b3c@redhat.com/

One series of laptops which is not able to suspend without this workaround
is the HP x2 10 Cherry Trail models, this commit adds a DMI based quirk
which makes sets honor_wakeup to false on these models.

Cc: stable@vger.kernel.org
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200105160357.97154-3-hdegoede@redhat.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-01-07 12:58:15 +01:00
Hans de Goede 1ad1b54099 gpiolib: acpi: Turn dmi_system_id table into a generic quirk table
Turn the existing run_edge_events_on_boot_blacklist dmi_system_id table
into a generic quirk table, storing the quirks in the driver_data ptr.

This is a preparation patch for adding other types of (DMI based) quirks.

Cc: stable@vger.kernel.org
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200105160357.97154-2-hdegoede@redhat.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-01-07 12:57:25 +01:00
Linus Torvalds 99a0d9f5e8 This is the bulk of GPIO changes for the v5.5 kernel cycle
Core changes:
 
 - Expose pull up/down flags for the GPIO character device to
   userspace. After clear input from the RaspberryPi and Beagle
   communities, it has been established that prototyping,
   industrial automation and make communities strongly need
   this feature, and as we want people to use the character
   device, we have implemented the simple pull up/down
   interface for GPIO lines. This means we can specify that
   a (chip-specific) pull up/down resistor can be enabled,
   but does not offer fine-grained control such as cases
   where the resistance of the same pull resistor can be
   controlled (yet).
 
 - Introduce devm_fwnode_gpiod_get_index() and start to phase out
   the old symbol devm_fwnode_get_index_gpiod_from_child().
 
 - A bit of documentation clean-up work.
 
 - Introduce a define for GPIO line directions and deploy it
   in all GPIO drivers in the drivers/gpio directory.
 
 - Add a special callback to populate pin ranges when
   cooperating with the pin control subsystem and registering
   ranges as part of adding a gpiolib driver and a
   gpio_irq_chip driver at the same time. This is also
   deployed in the Intel Merrifield driver.
 
 New drivers:
 
 - RDA Micro GPIO controller.
 
 - XGS-iproc GPIO driver.
 
 Driver improvements:
 
 - Wake event and debounce support on the Tegra 186 driver.
 
 - Finalize the Aspeed SGPIO driver.
 
 - MPC8xxx uses a normal IRQ handler rather than a chained
   handler.
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Merge tag 'gpio-v5.5-1' 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 v5.5 kernel cycle

  Core changes:

   - Expose pull up/down flags for the GPIO character device to
     userspace.

     After clear input from the RaspberryPi and Beagle communities, it
     has been established that prototyping, industrial automation and
     make communities strongly need this feature, and as we want people
     to use the character device, we have implemented the simple pull
     up/down interface for GPIO lines.

     This means we can specify that a (chip-specific) pull up/down
     resistor can be enabled, but does not offer fine-grained control
     such as cases where the resistance of the same pull resistor can be
     controlled (yet).

   - Introduce devm_fwnode_gpiod_get_index() and start to phase out the
     old symbol devm_fwnode_get_index_gpiod_from_child().

   - A bit of documentation clean-up work.

   - Introduce a define for GPIO line directions and deploy it in all
     GPIO drivers in the drivers/gpio directory.

   - Add a special callback to populate pin ranges when cooperating with
     the pin control subsystem and registering ranges as part of adding
     a gpiolib driver and a gpio_irq_chip driver at the same time. This
     is also deployed in the Intel Merrifield driver.

  New drivers:

   - RDA Micro GPIO controller.

   - XGS-iproc GPIO driver.

  Driver improvements:

   - Wake event and debounce support on the Tegra 186 driver.

   - Finalize the Aspeed SGPIO driver.

   - MPC8xxx uses a normal IRQ handler rather than a chained handler"

* tag 'gpio-v5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (64 commits)
  gpio: Add TODO item for regmap helper
  Documentation: gpio: driver.rst: Fix warnings
  gpio: of: Fix bogus reference to gpiod_get_count()
  gpiolib: Grammar s/manager/managed/
  gpio: lynxpoint: Setup correct IRQ handlers
  MAINTAINERS: Replace my email by one @kernel.org
  gpiolib: acpi: Make acpi_gpiochip_alloc_event always return AE_OK
  gpio/mpc8xxx: fix qoriq GPIO reading
  gpio: mpc8xxx: Don't overwrite default irq_set_type callback
  gpiolib: acpi: Print pin number on acpi_gpiochip_alloc_event errors
  gpiolib: fix coding style in gpiod_hog()
  drm/bridge: ti-tfp410: switch to using fwnode_gpiod_get_index()
  gpio: merrifield: Pass irqchip when adding gpiochip
  gpio: merrifield: Add GPIO <-> pin mapping ranges via callback
  gpiolib: Introduce ->add_pin_ranges() callback
  gpio: mmio: remove untrue leftover comment
  gpio: em: Use platform_get_irq() to obtain interrupts
  gpio: tegra186: Add debounce support
  gpio: tegra186: Program interrupt route mapping
  gpio: tegra186: Derive register offsets from bank/port
  ...
2019-12-01 17:56:50 -08:00
Hans de Goede d4fc46f173 gpiolib: acpi: Make acpi_gpiochip_alloc_event always return AE_OK
acpi_gpiochip_alloc_event is used to loop over all _AEI resources, if
we fail to bind an event handler to one of them, that is not a reason to
not try the other resources.

This commit modifies acpi_gpiochip_alloc_event to always return AE_OK,
so that we will always try to add an event handler for all _AEI resources.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20191114102600.34558-2-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-21 14:35:48 +01:00
Hans de Goede 3f86a7e090 gpiolib: acpi: Print pin number on acpi_gpiochip_alloc_event errors
Print pin number and error-code on acpi_gpiochip_alloc_event errors,
to help debugging these.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20191114102600.34558-1-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-15 13:47:10 +01:00
Hans de Goede 2727315df3 gpiolib: acpi: Add Terra Pad 1061 to the run_edge_events_on_boot_blacklist
The Terra Pad 1061 has the usual micro-USB-B id-pin handler, but instead
of controlling the actual micro-USB-B it turns the 5V boost for the
tablet's USB-A connector and its keyboard-cover connector off.

The actual micro-USB-B connector on the tablet is wired for charging only,
and its id pin is *not* connected to the GPIO which is used for the
(broken) id-pin event handler in the DSDT.

While at it not only add a comment why the Terra Pad 1061 is on the
blacklist, but also fix the missing comment for the Minix Neo Z83-4 entry.

Fixes: 61f7f7c8f9 ("gpiolib: acpi: Add gpiolib_acpi_run_edge_events_on_boot option and blacklist")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-11-13 22:57:26 +01:00
Linus Torvalds bbfe0d6b8b This is the bulk of changes in the GPIO subsystem for the
v5.4 kernel cycle.
 
 Core changes:
 
 - Support hierarchical GPIO irqchips. We now have three
   consumers that can use this: Intel IXP4xx, ThunderX and
   Qualcomm SPMI GPIO (in the pinctrl subsystem). The support
   code has been long in the making and hashed out so it should
   be easily adaptable for all hierarchical irqchip parents.
   The code only gets compiled in if hierarchical irqchip
   is used at the topmost irq controller at least, as the
   hierarchical irqchip requires strict hierarchy all the
   way up in the system.
 
 - Determine the need for a "valid_mask" for GPIO lines on the
   gpio_chip and conversely for the "valid_mask" for the GPIO
   interrupt chip interrupt lines by looking for a
   .init_valid_mask() callback in the main chip or GPIO interrupt
   chip respectively. Allocate it with bitmap_alloc().
 
 - Isolate the device tree/open firmware GPIO description code
   out in its own file properly.
 
 - Isolate the ACPI GPIO description code out in its own file
   properly.
 
 - Drop a whole lot of #ifdef:s in the main includes: it does
   not hurt to keep the include items around, and we get
   quicker and clearer compile failures if the appropriate
   kernel symbols are not selected for drivers.
 
 New/deleted drivers:
 
 - New driver for Aspeed SGPIO.
 
 - The KS8695 driver is deleted as the platform gets deleted
   from arch/arm in this kernel cycle.
 
 - The Cirrus Logic Madera driver now supports CS47L92 and
   CS47L15.
 
 - The Freescale MPC8xxx now supports LS1028A and LS1088A.
 
 Driver improvements:
 
 - We pass the GPIO irqchip intialization by directly filling
   in the struct instead of using set-up functions (the new
   way) for Intel MID, Lynxpoint, Merrifield, XLP, HLWD, Aspeed,
   ZX, VF610, TQMX86, MT7621, Zynq and EP93xx.
 
 Out-of-band changes:
 
 - Fix a GPIO header inclusion in Unicore - no response from
   maintainer.
 
 - Drop FMC subsystem from MAINTAINERS - was deleted in the
   GPIO tree last cycle so let's mop up the shards.
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Merge tag 'gpio-v5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of changes in the GPIO subsystem for the v5.4 kernel
  cycle.

  Core changes:

   - Support hierarchical GPIO irqchips.

     We now have three consumers that can use this: Intel IXP4xx,
     ThunderX and Qualcomm SPMI GPIO (in the pinctrl subsystem).

     The support code has been long in the making and hashed out so it
     should be easily adaptable for all hierarchical irqchip parents.
     The code only gets compiled in if hierarchical irqchip is used at
     the topmost irq controller at least, as the hierarchical irqchip
     requires strict hierarchy all the way up in the system.

   - Determine the need for a "valid_mask" for GPIO lines on the
     gpio_chip and conversely for the "valid_mask" for the GPIO
     interrupt chip interrupt lines by looking for a .init_valid_mask()
     callback in the main chip or GPIO interrupt chip respectively.
     Allocate it with bitmap_alloc().

   - Isolate the device tree/open firmware GPIO description code out in
     its own file properly.

   - Isolate the ACPI GPIO description code out in its own file
     properly.

   - Drop a whole lot of #ifdef:s in the main includes: it does not hurt
     to keep the include items around, and we get quicker and clearer
     compile failures if the appropriate kernel symbols are not selected
     for drivers.

  New/deleted drivers:

   - New driver for Aspeed SGPIO.

   - The KS8695 driver is deleted as the platform gets deleted from
     arch/arm in this kernel cycle.

   - The Cirrus Logic Madera driver now supports CS47L92 and CS47L15.

   - The Freescale MPC8xxx now supports LS1028A and LS1088A.

  Driver improvements:

   - We pass the GPIO irqchip intialization by directly filling in the
     struct instead of using set-up functions (the new way) for Intel
     MID, Lynxpoint, Merrifield, XLP, HLWD, Aspeed, ZX, VF610, TQMX86,
     MT7621, Zynq and EP93xx.

  Out-of-band changes:

   - Fix a GPIO header inclusion in Unicore - no response from
     maintainer.

   - Drop FMC subsystem from MAINTAINERS - was deleted in the GPIO tree
     last cycle so let's mop up the shards"

* tag 'gpio-v5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (82 commits)
  gpiolib: of: add a fallback for wlf,reset GPIO name
  gpio: htc-egpio: Remove unused exported htc_egpio_get_wakeup_irq()
  gpio: remove explicit comparison with 0
  gpio: creg-snps: use devm_platform_ioremap_resource() to simplify code
  gpio: devres: Switch to EXPORT_SYMBOL_GPL()
  gpio: of: Switch to EXPORT_SYMBOL_GPL()
  gpio: of: Make of_gpio_simple_xlate() private
  gpio: of: Make of_get_named_gpiod_flags() private
  gpio: aspeed: Add in ast2600 details to Aspeed driver
  gpio: aspeed: Use ngpio property from device tree if available
  gpio: aspeed: Setup irqchip dynamically
  gpio/aspeed: Fix incorrect number of banks
  gpio: aspeed: Update documentation with ast2600 controllers
  gpio: Initialize the irqchip valid_mask with a callback
  gpiolib: acpi: make acpi_can_fallback_to_crs() static
  gpio: Fix further merge errors
  gpio: Fix up merge collision in include file
  gpio: of: Normalize return code variable name
  gpio: gpiolib: Normalize return code variable name
  gpio: ep93xx: Pass irqchip when adding gpiochip
  ...
2019-09-16 14:06:50 -07:00
Hans de Goede 61f7f7c8f9 gpiolib: acpi: Add gpiolib_acpi_run_edge_events_on_boot option and blacklist
Another day; another DSDT bug we need to workaround...

Since commit ca876c7483 ("gpiolib-acpi: make sure we trigger edge events
at least once on boot") we call _AEI edge handlers at boot.

In some rare cases this causes problems. One example of this is the Minix
Neo Z83-4 mini PC, this device has a clear DSDT bug where it has some copy
and pasted code for dealing with Micro USB-B connector host/device role
switching, while the mini PC does not even have a micro-USB connector.
This code, which should not be there, messes with the DDC data pin from
the HDMI connector (switching it to GPIO mode) breaking HDMI support.

To avoid problems like this, this commit adds a new
gpiolib_acpi.run_edge_events_on_boot kernel commandline option, which
allows disabling the running of _AEI edge event handlers at boot.

The default value is -1/auto which uses a DMI based blacklist, the initial
version of this blacklist contains the Neo Z83-4 fixing the HDMI breakage.

Cc: stable@vger.kernel.org
Cc: Daniel Drake <drake@endlessm.com>
Cc: Ian W MORRISON <ianwmorrison@gmail.com>
Reported-by: Ian W MORRISON <ianwmorrison@gmail.com>
Suggested-by: Ian W MORRISON <ianwmorrison@gmail.com>
Fixes: ca876c7483 ("gpiolib-acpi: make sure we trigger edge events at least once on boot")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20190827202835.213456-1-hdegoede@redhat.com
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Ian W MORRISON <ianwmorrison@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-09-11 10:46:54 +01:00
Dmitry Torokhov 4f78d91c72 gpiolib: acpi: make acpi_can_fallback_to_crs() static
It is not used outside gpiolib-acpi.c module, so there is no need to
export it.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20190904172624.GA76617@dtor-ws
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-09-10 11:34:20 +01:00
Andy Shevchenko 2838bf941b gpiolib-acpi: Move acpi_dev_add_driver_gpios() et al to consumer.h
The API, which belongs to GPIO library, is foreign to ACPI headers. Earlier
we moved out I²C out of the latter, and now it's time for
acpi_dev_add_driver_gpios() et al.

For time being the acpi_gpio_get_irq_resource() and acpi_dev_gpio_irq_get()
are left untouched as they need more thought about.

Note, it requires uninline acpi_dev_remove_driver_gpios() to keep purity of
consumer.h.

Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Cc: Jie Yang <yang.jie@linux.intel.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: alsa-devel@alsa-project.org (moderated list:INTEL ASoC DRIVERS)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190730104337.21235-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-07-31 00:59:19 +02:00
Andy Shevchenko 77cb907abe gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h
This is a follow up to the commit

  f626d6dfb7 ("gpio: of: Break out OF-only code")

which broke down OF parts of GPIO library. Here we do the similar to ACPI.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190730104337.21235-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-07-31 00:57:21 +02:00
Linus Walleij 5923ea6c2c gpio: pass lookup and descriptor flags to request_own
When a gpio_chip wants to request a descriptor from itself
using gpiochip_request_own_desc() it needs to be able to specify
fully how to use the descriptor, notably line inversion
semantics. The workaround in the gpiolib.c can be removed
and cases (such as SPI CS) where we need at times to request
a GPIO with line inversion semantics directly on a chip for
workarounds, can be fully supported with this call.

Fix up some users of the API that weren't really using the
last flag to set up the line as input or output properly
but instead just calling direction setting explicitly
after requesting the line.

Cc: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-06-07 23:20:23 +02:00
Andy Shevchenko 2d3b6db122 gpiolib: acpi: Respect pin bias setting
For now, we don't take into account the pin bias settings supplied by ACPI.
This change is targeting the mentioned gap.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 10:55:28 +02:00
Andy Shevchenko 606be34440 gpiolib: acpi: Add acpi_gpio_update_gpiod_lookup_flags() helper
This helper consolidates all settings of GPIO descriptor lookup flags and
quirks in the future if any.

No functional change intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 10:55:24 +02:00
Andy Shevchenko 24a4954333 gpiolib: acpi: Set pin value, based on bias, more accurately
ACPI GpioIo() resource may have different bias settings.
For now, we distinguish only PullUp() setting in order to configure
the initial state of a pin.

Take into consideration the rest of the possible choices as well,
i.e. PullDown, PullNone and PullDefault, when configuring the initial state
of the pin.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 10:55:17 +02:00
Andy Shevchenko 80c8d927da gpiolib: acpi: Change type of dflags
Most of the code inside GPIO library is using enum gpiod_flags.
Some of the function still operate with unsigned int.

In order to be more consistent and better type checking, convert
acpi_gpiochip_parse_own_gpio() to use enum gpiod_flags instead of
unsigned int.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 10:55:14 +02:00
Andy Shevchenko 2d6c06f5a4 gpiolib: Introduce GPIO_LOOKUP_FLAGS_DEFAULT
Since GPIO library operates with enumerator when it's subject to handle
the GPIO lookup flags, it will be better to clearly see what default means.

Thus, introduce GPIO_LOOKUP_FLAGS_DEFAULT entry to describe
the default assumptions.

While here, replace 0 by newly introduced constant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 10:55:10 +02:00
Andy Shevchenko fed7026adc gpiolib: Make use of enum gpio_lookup_flags consistent
The library uses enum gpio_lookup_flags to define the possible
characteristics of GPIO pin. Since enumerator listed only individual
bits the common use of it is in a form of a bitmask of
gpio_lookup_flags GPIO_* values. The more correct type for this is
unsigned long.

Due to above convert all users to use unsigned long instead of
enum gpio_lookup_flags except enumerator definition.

While here, make field and parameter descriptions consistent as well.

Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-04-23 10:55:07 +02:00
Andy Shevchenko 85edcd01a9 gpiolib: acpi: Fix references in kernel doc and amend
This patch does the following bunch of changes:
 - append () to the functions for reference
 - convert gpiochip(s) -> GPIO chip(s)
 - add a note about returned error code type [acpi_find_gpio()]
 - move long summary to a description [acpi_gpio_count()]

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-04-01 10:32:29 +02:00
Linus Torvalds 3601fe43e8 This is the bulk of GPIO changes for the v5.1 cycle:
Core changes:
 
 - The big change this time around is the irqchip handling in
   the qualcomm pin controllers, closely coupled with the
   gpiochip. This rework, in a classic fall-between-the-chairs
   fashion has been sidestepped for too long. The Qualcomm
   IRQchips using the SPMI and SSBI transport mechanisms have
   been rewritten to use hierarchical irqchip. This creates
   the base from which I intend to gradually pull support for
   hierarchical irqchips into the gpiolib irqchip helpers to
   cut down on duplicate code. We have too many hacks in the
   kernel because people have been working around the missing
   hierarchical irqchip for years, and once it was there,
   noone understood it for a while. We are now slowly adapting
   to using it. This is why this pull requests include changes
   to MFD, SPMI, IRQchip core and some ARM Device Trees
   pertaining to the Qualcomm chip family. Since Qualcomm have
   so many chips and such large deployments it is paramount
   that this platform gets this right, and now it (hopefully)
   does.
 
 - Core support for pull-up and pull-down configuration, also
   from the device tree. When a simple GPIO chip support a
   "off or on" pull-up or pull-down resistor, we provide a
   way to set this up using machine descriptors or device tree.
   If more elaborate control of pull up/down (such as
   resistance shunt setting) is required, drivers should be
   phased over to use pin control. We do not yet provide a
   userspace ABI for this pull up-down setting but I suspect
   the makers are going to ask for it soon enough. PCA953x
   is the first user of this new API.
 
 - The GPIO mockup driver has been revamped after some
   discussion improving the IRQ simulator in the process.
   The idea is to make it possible to use the mockup for
   both testing and virtual prototyping, e.g. when you do
   not yet have a GPIO expander to play with but really
   want to get something to develop code around before
   hardware is available. It's neat. The blackbox testing
   usecase is currently making its way into kernelci.
 
 - ACPI GPIO core preserves non direction flags when updating
   flags.
 
 - A new device core helper for devm_platform_ioremap_resource()
   is funneled through the GPIO tree with Greg's ACK.
 
 New drivers:
 
 - TQ-Systems QTMX86 GPIO controllers (using port-mapped
   I/O)
 
 - Gateworks PLD GPIO driver (vaccumed up from OpenWrt)
 
 - AMD G-Series PCH (Platform Controller Hub) GPIO driver.
 
 - Fintek F81804 & F81966 subvariants.
 
 - PCA953x now supports NXP PCAL6416.
 
 Driver improvements:
 
 - IRQ support on the Nintendo Wii (Hollywood) GPIO.
 
 - get_direction() support for the MVEBU driver.
 
 - Set the right output level on SAMA5D2.
 
 - Drop the unused irq trigger setting on the Spreadtrum
   driver.
 
 - Wakeup support for PCA953x.
 
 - A slew of cleanups in the various Intel drivers.
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Merge tag 'gpio-v5.1-1' 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 v5.1 cycle:

  Core changes:

   - The big change this time around is the irqchip handling in the
     qualcomm pin controllers, closely coupled with the gpiochip. This
     rework, in a classic fall-between-the-chairs fashion has been
     sidestepped for too long.

     The Qualcomm IRQchips using the SPMI and SSBI transport mechanisms
     have been rewritten to use hierarchical irqchip. This creates the
     base from which I intend to gradually pull support for hierarchical
     irqchips into the gpiolib irqchip helpers to cut down on duplicate
     code.

     We have too many hacks in the kernel because people have been
     working around the missing hierarchical irqchip for years, and once
     it was there, noone understood it for a while. We are now slowly
     adapting to using it.

     This is why this pull requests include changes to MFD, SPMI,
     IRQchip core and some ARM Device Trees pertaining to the Qualcomm
     chip family. Since Qualcomm have so many chips and such large
     deployments it is paramount that this platform gets this right, and
     now it (hopefully) does.

   - Core support for pull-up and pull-down configuration, also from the
     device tree. When a simple GPIO chip supports an "off or on" pull-up
     or pull-down resistor, we provide a way to set this up using
     machine descriptors or device tree.

     If more elaborate control of pull up/down (such as resistance shunt
     setting) is required, drivers should be phased over to use pin
     control. We do not yet provide a userspace ABI for this pull
     up-down setting but I suspect the makers are going to ask for it
     soon enough. PCA953x is the first user of this new API.

   - The GPIO mockup driver has been revamped after some discussion
     improving the IRQ simulator in the process.

     The idea is to make it possible to use the mockup for both testing
     and virtual prototyping, e.g. when you do not yet have a GPIO
     expander to play with but really want to get something to develop
     code around before hardware is available. It's neat. The blackbox
     testing usecase is currently making its way into kernelci.

   - ACPI GPIO core preserves non direction flags when updating flags.

   - A new device core helper for devm_platform_ioremap_resource() is
     funneled through the GPIO tree with Greg's ACK.

  New drivers:

   - TQ-Systems QTMX86 GPIO controllers (using port-mapped I/O)

   - Gateworks PLD GPIO driver (vaccumed up from OpenWrt)

   - AMD G-Series PCH (Platform Controller Hub) GPIO driver.

   - Fintek F81804 & F81966 subvariants.

   - PCA953x now supports NXP PCAL6416.

  Driver improvements:

   - IRQ support on the Nintendo Wii (Hollywood) GPIO.

   - get_direction() support for the MVEBU driver.

   - Set the right output level on SAMA5D2.

   - Drop the unused irq trigger setting on the Spreadtrum driver.

   - Wakeup support for PCA953x.

   - A slew of cleanups in the various Intel drivers"

* tag 'gpio-v5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (110 commits)
  gpio: gpio-omap: fix level interrupt idling
  gpio: amd-fch: Set proper output level for direction_output
  x86: apuv2: remove unused variable
  gpio: pca953x: Use PCA_LATCH_INT
  platform/x86: fix PCENGINES_APU2 Kconfig warning
  gpio: pca953x: Fix dereference of irq data in shutdown
  gpio: amd-fch: Fix type error found by sparse
  gpio: amd-fch: Drop const from resource
  gpio: mxc: add check to return defer probe if clock tree NOT ready
  gpio: ftgpio: Register per-instance irqchip
  gpio: ixp4xx: Add DT bindings
  x86: pcengines apuv2 gpio/leds/keys platform driver
  gpio: AMD G-Series PCH gpio driver
  drivers: depend on HAS_IOMEM for devm_platform_ioremap_resource()
  gpio: tqmx86: Set proper output level for direction_output
  gpio: sprd: Change to use SoC compatible string
  gpio: sprd: Use SoC compatible string instead of wildcard string
  gpio: of: Handle both enable-gpio{,s}
  gpio: of: Restrict enable-gpio quirk to regulator-gpio
  gpio: davinci: use devm_platform_ioremap_resource()
  ...
2019-03-08 10:09:53 -08:00
Linus Torvalds da2577fe63 sound updates for 5.1
We had again a busy development cycle with many new drivers as well as
 lots of core improvements / cleanups.  Let's go for highlights:
 
 ALSA core:
 - PCM locking scheme was refactored for reducing a global rwlock
 - PCM suspend is handled in the device type PM ops now; lots of
   explicit calls were reduced by this action
 - Cleanups about PCM buffer preallocation calls
 - Kill NULL device object in memory allocations
 - Lots of procfs API cleanups
 
 ASoC core:
 - Support for only powering up channels that are actively being used
 - Cleanups / fixes of topology API
 
 ASoC drivers:
 - MediaTek BTCVSD for a Bluetooth radio chip, which is the first such
   driver we've had upstream!
 - Quite a few improvements to simplify the generic card drivers,
   especially the merge of the SCU cards into the main generic drivers
 - Lots of fixes for probing on Intel systems to follow more standard
   styles
 - A big refresh and cleanup of the Samsung drivers
 - New drivers: Asahi Kasei Microdevices AK4497, Cirrus Logic CS4341
   and CS35L26, Google ChromeOS embedded controllers, Ingenic JZ4725B,
   MediaTek BTCVSD, MT8183 and MT6358, NXP MICFIL, Rockchip RK3328,
   Spreadtrum DMA controllers, Qualcomm WCD9335, Xilinx S/PDIF and PCM
   formatters
 
 ALSA drivers:
 - Improvements of Tegra HD-audio controller driver for supporting new
   chips
 - HD-audio codec quirks for ALC294 S4 resume, ASUS laptop, Chrome
   headset button support and Dell workstations
 - Improved DSD support on USB-audio
 - Quirk for MOTU MicroBook II USB-audio
 - Support for Fireface UCX support and Solid State Logic Duende
   Classic/Mini
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Merge tag 'sound-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "We had again a busy development cycle with many new drivers as well as
  lots of core improvements / cleanups. Let's go for highlights:

  ALSA core:

   - PCM locking scheme was refactored for reducing a global rwlock

   - PCM suspend is handled in the device type PM ops now; lots of
     explicit calls were reduced by this action

   - Cleanups about PCM buffer preallocation calls

   - Kill NULL device object in memory allocations

   - Lots of procfs API cleanups

  ASoC core:

   - Support for only powering up channels that are actively being used

   - Cleanups / fixes of topology API

  ASoC drivers:

   - MediaTek BTCVSD for a Bluetooth radio chip, which is the first such
     driver we've had upstream!

   - Quite a few improvements to simplify the generic card drivers,
     especially the merge of the SCU cards into the main generic drivers

   - Lots of fixes for probing on Intel systems to follow more standard
     styles

   - A big refresh and cleanup of the Samsung drivers

   - New drivers: Asahi Kasei Microdevices AK4497, Cirrus Logic CS4341
     and CS35L26, Google ChromeOS embedded controllers, Ingenic JZ4725B,
     MediaTek BTCVSD, MT8183 and MT6358, NXP MICFIL, Rockchip RK3328,
     Spreadtrum DMA controllers, Qualcomm WCD9335, Xilinx S/PDIF and PCM
     formatters

  ALSA drivers:

   - Improvements of Tegra HD-audio controller driver for supporting new
     chips

   - HD-audio codec quirks for ALC294 S4 resume, ASUS laptop, Chrome
     headset button support and Dell workstations

   - Improved DSD support on USB-audio

   - Quirk for MOTU MicroBook II USB-audio

   - Support for Fireface UCX support and Solid State Logic Duende
     Classic/Mini"

* tag 'sound-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (461 commits)
  ALSA: usb-audio: Add quirk for MOTU MicroBook II
  ASoC: stm32: i2s: skip useless write in slave mode
  ASoC: stm32: i2s: fix race condition in irq handler
  ASoC: stm32: i2s: remove useless callback
  ASoC: stm32: i2s: fix dma configuration
  ASoC: stm32: i2s: fix stream count management
  ASoC: stm32: i2s: fix 16 bit format support
  ASoC: stm32: i2s: fix IRQ clearing
  ASoC: qcom: Kconfig: fix dependency for sdm845
  ASoC: Intel: Boards: Add Maxim98373 support
  ASoC: rsnd: gen: fix SSI9 4/5/6/7 busif related register address
  ALSA: firewire-motu: fix construction of PCM frame for capture direction
  ALSA: bebob: use more identical mod_alias for Saffire Pro 10 I/O against Liquid Saffire 56
  ALSA: hda: Extend i915 component bind timeout
  ASoC: wm_adsp: Improve logging messages
  ASoC: wm_adsp: Add support for multiple compressed buffers
  ASoC: wm_adsp: Refactor compress stream initialisation
  ASoC: wm_adsp: Reorder some functions for improved clarity
  ASoC: wm_adsp: Factor out stripping padding from ADSP data
  ASoC: cs35l36: Fix an IS_ERR() vs NULL checking bug
  ...
2019-03-06 14:10:46 -08:00
Rafael J. Wysocki 7db52b5ace Merge branch 'acpica'
* acpica:
  ACPICA: Update version to 20190215
  ACPI/ACPICA: Trivial: fix spelling mistakes and fix whitespace formatting
  ACPICA: ACPI 6.3: add GTDT Revision 3 support
  ACPICA: ACPI 6.3: HMAT updates
  ACPICA: ACPI 6.3: PPTT add additional fields in Processor Structure Flags
  ACPICA: ACPI 6.3: add Error Disconnect Recover Notification value
  ACPICA: ACPI 6.3: MADT: add support for statistical profiling in GICC
  ACPICA: ACPI 6.3: add PCC operation region support for AML interpreter
  ACPICA: ACPI 6.3: SRAT: add Generic Affinity Structure subtable
  ACPICA: ACPI 6.3: Add Trigger order to PCC Identifier structure in PDTT
  ACPICA: ACPI 6.3: Adding predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG
  ACPICA: Update/clarify messages for control method failures
  ACPICA: Debugger: Fix possible fault with the "test objects" command
  ACPICA: Interpreter: Emit warning for creation of a zero-length op region
  ACPICA: Remove legacy module-level code support
  ACPICA: Get rid of acpi_sleep_dispatch()
  ACPICA: Update version to 20190108
  ACPICA: All acpica: Update copyrights to 2019
  ACPICA: acpiexec: Add option to dump extra info for memory leaks
  ACPICA: Convert more ACPI errors to firmware errors
2019-03-04 11:15:30 +01:00
Erik Schmauss c163f90cc8 ACPI/ACPICA: Trivial: fix spelling mistakes and fix whitespace formatting
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2019-02-24 21:12:01 +01:00
Linus Walleij 8fab3d713c gpio updates for v5.1
- support for a new variant of pca953x
 - documentation fix from Wolfram
 - some tegra186 name changes
 - two minor fixes for madera and altera-a10sr
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Merge tag 'gpio-v5.1-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

gpio updates for v5.1

- support for a new variant of pca953x
- documentation fix from Wolfram
- some tegra186 name changes
- two minor fixes for madera and altera-a10sr
2019-02-17 21:59:33 +01:00
Andy Shevchenko 4d1f7a6eab
gpiolib: acpi: Introduce ACPI_GPIO_QUIRK_ONLY_GPIOIO
New quirk enforces search for GPIO based on its type,
i.e. iterate over GpioIo resources only.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-08 17:29:51 +00:00
Andy Shevchenko 876811f7c3 gpiolib: acpi: Correct kernel doc of struct acpi_gpio_event
The checker complains during build

gpiolib-acpi.c:45: warning: Function parameter or member 'irq_requested' not described in 'acpi_gpio_event'

because the typo in the field description.

Fix the name to have documentation up-to-date.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-01-28 15:24:15 +01:00
Hans de Goede 72893f0c6b gpiolib-acpi: Preserve non direction flags when updating gpiod_flags
__acpi_gpio_update_gpiod_flags purpose is to make the gpiod_flags used
when requesting a GPIO match the restrictions from the ACPI resource,
as stored in acpi_gpio_info.flags.

But acpi_gpio_info.flags only contains direction info, and the
requester may have passed in special non-direction flags like
GPIOD_FLAGS_BIT_NONEXCLUSIVE, which we currently clobber.

This commit modifies __acpi_gpio_update_gpiod_flags to preserve these
special flags, so that a requested of an ACPI GPIO can e.g. pass
GPIOD_FLAGS_BIT_NONEXCLUSIV and have it work as intended.

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-01-10 16:22:37 +01:00
Hans de Goede 8625232977 gpiolib-acpi: Remove unnecessary WARN_ON from acpi_gpiochip_free_interrupts
acpi_gpiochip_alloc_event only continues allocating an event and adding
it to the list if gpiochip_request_own_desc does not return an error.
So events with an error desc are never placed on the events list and this
check is really not necessary.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-01-07 09:23:23 +01:00
Linus Torvalds 24dc83635f This is the bulk of GPIO changes for the v4.21 kernel series:
Core changes:
 
 - Some core changes are already in outside of this pull
   request as they came through the regulator tree, most
   notably devm_gpiod_unhinge() that removes devres refcount
   management from a GPIO descriptor. This is needed in
   subsystems such as regulators where the regulator core
   need to take over the reference counting and lifecycle
   management for a GPIO descriptor.
 
 - We dropped devm_gpiochip_remove() and devm_gpio_chip_match()
   as nothing needs it. We can bring it back if need be.
 
 - Add a global TODO so people see where we are going. This
   helps setting the direction now that we are two GPIO
   maintainers.
 
 - Handle the MMC CD/WP properties in the device tree core.
   (The bulk of patches activating this code is already
   merged through the MMC/SD tree.)
 
 - Augment gpiochip_request_own_desc() to pass a flag so
   we as gpiochips can request lines as active low or open
   drain etc even from ourselves.
 
 New drivers:
 
 - New driver for Cadence GPIO blocks.
 
 - New driver for Atmel SAMA5D2 PIOBU GPIO lines.
 
 Driver improvements:
 
 - A major refactoring of the PCA953x driver - this driver has
   been around for ages, and is now modernized to reduce code
   duplication that has stacked up and is using regmap to read
   write and cache registers.
 
 - Intel drivers are now maintained in a separate tree and
   start with a round of cleanups and unifications.
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Merge tag 'gpio-v4.21-1' 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 v4.21 kernel series.

  Core changes:

   - Some core changes are already in outside of this pull request as
     they came through the regulator tree, most notably
     devm_gpiod_unhinge() that removes devres refcount management from a
     GPIO descriptor. This is needed in subsystems such as regulators
     where the regulator core need to take over the reference counting
     and lifecycle management for a GPIO descriptor.

   - We dropped devm_gpiochip_remove() and devm_gpio_chip_match() as
     nothing needs it. We can bring it back if need be.

   - Add a global TODO so people see where we are going. This helps
     setting the direction now that we are two GPIO maintainers.

   - Handle the MMC CD/WP properties in the device tree core. (The bulk
     of patches activating this code is already merged through the
     MMC/SD tree.)

   - Augment gpiochip_request_own_desc() to pass a flag so we as
     gpiochips can request lines as active low or open drain etc even
     from ourselves.

  New drivers:

   - New driver for Cadence GPIO blocks.

   - New driver for Atmel SAMA5D2 PIOBU GPIO lines.

  Driver improvements:

   - A major refactoring of the PCA953x driver - this driver has been
     around for ages, and is now modernized to reduce code duplication
     that has stacked up and is using regmap to read write and cache
     registers.

   - Intel drivers are now maintained in a separate tree and start with
     a round of cleanups and unifications"

* tag 'gpio-v4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (99 commits)
  gpio: sama5d2-piobu: Depend on OF_GPIO
  gpio: Add Cadence GPIO driver
  dt-bindings: gpio: Add bindings for Cadence GPIO
  gpiolib-acpi: remove unused variable 'err', cleans up build warning
  gpio: mxs: read pin level directly instead of using .get
  gpio: aspeed: remove duplicated statement
  gpio: add driver for SAMA5D2 PIOBU pins
  dt-bindings: arm: atmel: describe SECUMOD usage as a GPIO controller
  gpio/mmc/of: Respect polarity in the device tree
  dt-bindings: gpio: rcar: Add r8a774c0 (RZ/G2E) support
  memory: omap-gpmc: Get the header of the enum
  ARM: omap1: Fix new user of gpiochip_request_own_desc()
  gpio: pca953x: Add regmap dependency for PCA953x driver
  gpio: raspberrypi-exp: decrease refcount on firmware dt node
  gpiolib: Fix return value of gpio_to_desc() stub if !GPIOLIB
  gpio: pca953x: Restore registers after suspend/resume cycle
  gpio: pca953x: Zap single use of pca953x_read_single()
  gpio: pca953x: Zap ad-hoc reg_output cache
  gpio: pca953x: Zap ad-hoc reg_direction cache
  gpio: pca953x: Perform basic regmap conversion
  ...
2018-12-28 20:00:21 -08:00
Colin Ian King 6c905f91d8 gpiolib-acpi: remove unused variable 'err', cleans up build warning
Variable err is defined but never used. Remove it. Cleans up warning:

warning: unused variable ‘err’ [-Wunused-variable]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-12-21 11:31:28 +01:00
Linus Walleij 21abf10381 gpio: Pass a flag to gpiochip_request_own_desc()
Before things go out of hand, make it possible to pass
flags when requesting "own" descriptors from a gpio_chip.
This is necessary if the chip wants to request a GPIO with
active low semantics, for example.

Cc: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Roger Quadros <rogerq@ti.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-12-14 14:24:33 +01:00
Hans de Goede e59f5e08ec gpiolib-acpi: Only defer request_irq for GpioInt ACPI event handlers
Commit 78d3a92edb ("gpiolib-acpi: Register GpioInt ACPI event handlers
from a late_initcall") deferred the entire acpi_gpiochip_request_interrupt
call for each event resource.

This means it also delays the gpiochip_request_own_desc(..., "ACPI:Event")
call. This is a problem if some AML code reads the GPIO pin before we
run the deferred acpi_gpiochip_request_interrupt, because in that case
acpi_gpio_adr_space_handler() will already have called
gpiochip_request_own_desc(..., "ACPI:OpRegion") causing the call from
acpi_gpiochip_request_interrupt to fail with -EBUSY and we will fail to
register an event handler.

acpi_gpio_adr_space_handler is prepared for acpi_gpiochip_request_interrupt
already having claimed the pin, but the other way around does not work.

One example of a problem this causes, is the event handler for the OTG
ID pin on a Prowise PT301 tablet not registering, keeping the port stuck
in whatever mode it was in during boot and e.g. only allowing charging
after a reboot.

This commit fixes this by only deferring the request_irq call and the
initial run of edge-triggered IRQs instead of deferring all of
acpi_gpiochip_request_interrupt.

Cc: stable@vger.kernel.org
Fixes: 78d3a92edb ("gpiolib-acpi: Register GpioInt ACPI event ...")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-12-07 11:01:29 +01:00
Linus Torvalds bd6bf7c104 pci-v4.20-changes
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Merge tag 'pci-v4.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:

 - Fix ASPM link_state teardown on removal (Lukas Wunner)

 - Fix misleading _OSC ASPM message (Sinan Kaya)

 - Make _OSC optional for PCI (Sinan Kaya)

 - Don't initialize ASPM link state when ACPI_FADT_NO_ASPM is set
   (Patrick Talbert)

 - Remove x86 and arm64 node-local allocation for host bridge structures
   (Punit Agrawal)

 - Pay attention to device-specific _PXM node values (Jonathan Cameron)

 - Support new Immediate Readiness bit (Felipe Balbi)

 - Differentiate between pciehp surprise and safe removal (Lukas Wunner)

 - Remove unnecessary pciehp includes (Lukas Wunner)

 - Drop pciehp hotplug_slot_ops wrappers (Lukas Wunner)

 - Tolerate PCIe Slot Presence Detect being hardwired to zero to
   workaround broken hardware, e.g., the Wilocity switch/wireless device
   (Lukas Wunner)

 - Unify pciehp controller & slot structs (Lukas Wunner)

 - Constify hotplug_slot_ops (Lukas Wunner)

 - Drop hotplug_slot_info (Lukas Wunner)

 - Embed hotplug_slot struct into users instead of allocating it
   separately (Lukas Wunner)

 - Initialize PCIe port service drivers directly instead of relying on
   initcall ordering (Keith Busch)

 - Restore PCI config state after a slot reset (Keith Busch)

 - Save/restore DPC config state along with other PCI config state
   (Keith Busch)

 - Reference count devices during AER handling to avoid race issue with
   concurrent hot removal (Keith Busch)

 - If an Upstream Port reports ERR_FATAL, don't try to read the Port's
   config space because it is probably unreachable (Keith Busch)

 - During error handling, use slot-specific reset instead of secondary
   bus reset to avoid link up/down issues on hotplug ports (Keith Busch)

 - Restore previous AER/DPC handling that does not remove and
   re-enumerate devices on ERR_FATAL (Keith Busch)

 - Notify all drivers that may be affected by error recovery resets
   (Keith Busch)

 - Always generate error recovery uevents, even if a driver doesn't have
   error callbacks (Keith Busch)

 - Make PCIe link active reporting detection generic (Keith Busch)

 - Support D3cold in PCIe hierarchies during system sleep and runtime,
   including hotplug and Thunderbolt ports (Mika Westerberg)

 - Handle hpmemsize/hpiosize kernel parameters uniformly, whether slots
   are empty or occupied (Jon Derrick)

 - Remove duplicated include from pci/pcie/err.c and unused variable
   from cpqphp (YueHaibing)

 - Remove driver pci_cleanup_aer_uncorrect_error_status() calls (Oza
   Pawandeep)

 - Uninline PCI bus accessors for better ftracing (Keith Busch)

 - Remove unused AER Root Port .error_resume method (Keith Busch)

 - Use kfifo in AER instead of a local version (Keith Busch)

 - Use threaded IRQ in AER bottom half (Keith Busch)

 - Use managed resources in AER core (Keith Busch)

 - Reuse pcie_port_find_device() for AER injection (Keith Busch)

 - Abstract AER interrupt handling to disconnect error injection (Keith
   Busch)

 - Refactor AER injection callbacks to simplify future improvments
   (Keith Busch)

 - Remove unused Netronome NFP32xx Device IDs (Jakub Kicinski)

 - Use bitmap_zalloc() for dma_alias_mask (Andy Shevchenko)

 - Add switch fall-through annotations (Gustavo A. R. Silva)

 - Remove unused Switchtec quirk variable (Joshua Abraham)

 - Fix pci.c kernel-doc warning (Randy Dunlap)

 - Remove trivial PCI wrappers for DMA APIs (Christoph Hellwig)

 - Add Intel GPU device IDs to spurious interrupt quirk (Bin Meng)

 - Run Switchtec DMA aliasing quirk only on NTB endpoints to avoid
   useless dmesg errors (Logan Gunthorpe)

 - Update Switchtec NTB documentation (Wesley Yung)

 - Remove redundant "default n" from Kconfig (Bartlomiej Zolnierkiewicz)

 - Avoid panic when drivers enable MSI/MSI-X twice (Tonghao Zhang)

 - Add PCI support for peer-to-peer DMA (Logan Gunthorpe)

 - Add sysfs group for PCI peer-to-peer memory statistics (Logan
   Gunthorpe)

 - Add PCI peer-to-peer DMA scatterlist mapping interface (Logan
   Gunthorpe)

 - Add PCI configfs/sysfs helpers for use by peer-to-peer users (Logan
   Gunthorpe)

 - Add PCI peer-to-peer DMA driver writer's documentation (Logan
   Gunthorpe)

 - Add block layer flag to indicate driver support for PCI peer-to-peer
   DMA (Logan Gunthorpe)

 - Map Infiniband scatterlists for peer-to-peer DMA if they contain P2P
   memory (Logan Gunthorpe)

 - Register nvme-pci CMB buffer as PCI peer-to-peer memory (Logan
   Gunthorpe)

 - Add nvme-pci support for PCI peer-to-peer memory in requests (Logan
   Gunthorpe)

 - Use PCI peer-to-peer memory in nvme (Stephen Bates, Steve Wise,
   Christoph Hellwig, Logan Gunthorpe)

 - Cache VF config space size to optimize enumeration of many VFs
   (KarimAllah Ahmed)

 - Remove unnecessary <linux/pci-ats.h> include (Bjorn Helgaas)

 - Fix VMD AERSID quirk Device ID matching (Jon Derrick)

 - Fix Cadence PHY handling during probe (Alan Douglas)

 - Signal Cadence Endpoint interrupts via AXI region 0 instead of last
   region (Alan Douglas)

 - Write Cadence Endpoint MSI interrupts with 32 bits of data (Alan
   Douglas)

 - Remove redundant controller tests for "device_type == pci" (Rob
   Herring)

 - Document R-Car E3 (R8A77990) bindings (Tho Vu)

 - Add device tree support for R-Car r8a7744 (Biju Das)

 - Drop unused mvebu PCIe capability code (Thomas Petazzoni)

 - Add shared PCI bridge emulation code (Thomas Petazzoni)

 - Convert mvebu to use shared PCI bridge emulation (Thomas Petazzoni)

 - Add aardvark Root Port emulation (Thomas Petazzoni)

 - Support 100MHz/200MHz refclocks for i.MX6 (Lucas Stach)

 - Add initial power management for i.MX7 (Leonard Crestez)

 - Add PME_Turn_Off support for i.MX7 (Leonard Crestez)

 - Fix qcom runtime power management error handling (Bjorn Andersson)

 - Update TI dra7xx unaligned access errata workaround for host mode as
   well as endpoint mode (Vignesh R)

 - Fix kirin section mismatch warning (Nathan Chancellor)

 - Remove iproc PAXC slot check to allow VF support (Jitendra Bhivare)

 - Quirk Keystone K2G to limit MRRS to 256 (Kishon Vijay Abraham I)

 - Update Keystone to use MRRS quirk for host bridge instead of open
   coding (Kishon Vijay Abraham I)

 - Refactor Keystone link establishment (Kishon Vijay Abraham I)

 - Simplify and speed up Keystone link training (Kishon Vijay Abraham I)

 - Remove unused Keystone host_init argument (Kishon Vijay Abraham I)

 - Merge Keystone driver files into one (Kishon Vijay Abraham I)

 - Remove redundant Keystone platform_set_drvdata() (Kishon Vijay
   Abraham I)

 - Rename Keystone functions for uniformity (Kishon Vijay Abraham I)

 - Add Keystone device control module DT binding (Kishon Vijay Abraham
   I)

 - Use SYSCON API to get Keystone control module device IDs (Kishon
   Vijay Abraham I)

 - Clean up Keystone PHY handling (Kishon Vijay Abraham I)

 - Use runtime PM APIs to enable Keystone clock (Kishon Vijay Abraham I)

 - Clean up Keystone config space access checks (Kishon Vijay Abraham I)

 - Get Keystone outbound window count from DT (Kishon Vijay Abraham I)

 - Clean up Keystone outbound window configuration (Kishon Vijay Abraham
   I)

 - Clean up Keystone DBI setup (Kishon Vijay Abraham I)

 - Clean up Keystone ks_pcie_link_up() (Kishon Vijay Abraham I)

 - Fix Keystone IRQ status checking (Kishon Vijay Abraham I)

 - Add debug messages for all Keystone errors (Kishon Vijay Abraham I)

 - Clean up Keystone includes and macros (Kishon Vijay Abraham I)

 - Fix Mediatek unchecked return value from devm_pci_remap_iospace()
   (Gustavo A. R. Silva)

 - Fix Mediatek endpoint/port matching logic (Honghui Zhang)

 - Change Mediatek Root Port Class Code to PCI_CLASS_BRIDGE_PCI (Honghui
   Zhang)

 - Remove redundant Mediatek PM domain check (Honghui Zhang)

 - Convert Mediatek to pci_host_probe() (Honghui Zhang)

 - Fix Mediatek MSI enablement (Honghui Zhang)

 - Add Mediatek system PM support for MT2712 and MT7622 (Honghui Zhang)

 - Add Mediatek loadable module support (Honghui Zhang)

 - Detach VMD resources after stopping root bus to prevent orphan
   resources (Jon Derrick)

 - Convert pcitest build process to that used by other tools (iio, perf,
   etc) (Gustavo Pimentel)

* tag 'pci-v4.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (140 commits)
  PCI/AER: Refactor error injection fallbacks
  PCI/AER: Abstract AER interrupt handling
  PCI/AER: Reuse existing pcie_port_find_device() interface
  PCI/AER: Use managed resource allocations
  PCI: pcie: Remove redundant 'default n' from Kconfig
  PCI: aardvark: Implement emulated root PCI bridge config space
  PCI: mvebu: Convert to PCI emulated bridge config space
  PCI: mvebu: Drop unused PCI express capability code
  PCI: Introduce PCI bridge emulated config space common logic
  PCI: vmd: Detach resources after stopping root bus
  nvmet: Optionally use PCI P2P memory
  nvmet: Introduce helper functions to allocate and free request SGLs
  nvme-pci: Add support for P2P memory in requests
  nvme-pci: Use PCI p2pmem subsystem to manage the CMB
  IB/core: Ensure we map P2P memory correctly in rdma_rw_ctx_[init|destroy]()
  block: Add PCI P2P flag for request queue
  PCI/P2PDMA: Add P2P DMA driver writer's documentation
  docs-rst: Add a new directory for PCI documentation
  PCI/P2PDMA: Introduce configfs/sysfs enable attribute helpers
  PCI/P2PDMA: Add PCI p2pmem DMA mappings to adjust the bus offset
  ...
2018-10-25 06:50:48 -07:00
Linus Torvalds 114b5f8f7e This is the bulk of GPIO changes for the v4.20 series:
Core changes:
 
 - A patch series from Hans Verkuil to make it possible to
   enable/disable IRQs on a GPIO line at runtime and drive GPIO
   lines as output without having to put/get them from scratch.
   The irqchip callbacks have been improved so that they can
   use only the fastpatch callbacks to enable/disable irqs
   like any normal irqchip, especially the gpiod_lock_as_irq()
   has been improved to be callable in fastpath context.
   A bunch of rework had to be done to achieve this but it is
   a big win since I never liked to restrict this to slowpath.
   The only call requireing slowpath was try_module_get() and
   this is kept at the .request_resources() slowpath callback.
   In the GPIO CEC driver this is a big win sine a single
   line is used for both outgoing and incoming traffic, and
   this needs to use IRQs for incoming traffic while actively
   driving the line for outgoing traffic.
 
 - Janusz Krzysztofik improved the GPIO array API to pass a
   "cookie" (struct gpio_array) and a bitmap for setting or
   getting multiple GPIO lines at once. This improvement
   orginated in a specific need to speed up an OMAP1 driver and
   has led to a much better API and real performance gains
   when the state of the array can be used to bypass a lot
   of checks and code when we want things to go really fast.
   The previous code would minimize the number of calls
   down to the driver callbacks assuming the CPU speed was
   orders of magnitude faster than the I/O latency, but this
   assumption was wrong on several platforms: what we needed
   to do was to profile and improve the speed on the hot
   path of the array functions and this change is now
   completed.
 
 - Clean out the painful and hard to grasp BNF experiments
   from the device tree bindings. Future approaches are looking
   into using JSON schema for this purpose. (Rob Herring
   is floating a patch series.)
 
 New drivers:
 
 - The RCAR driver now supports r8a774a1 (RZ/G2M).
 
 - Synopsys GPIO via CREGs driver.
 
 Major improvements:
 
 - Modernization of the EP93xx driver to use irqdomain and
   other contemporary concepts.
 
 - The ingenic driver has been merged into the Ingenic pin
   control driver and removed from the GPIO subsystem.
 
 - Debounce support in the ftgpio010 driver.
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Merge tag 'gpio-v4.20-1' 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 v4.20 series:

  Core changes:

   - A patch series from Hans Verkuil to make it possible to
     enable/disable IRQs on a GPIO line at runtime and drive GPIO lines
     as output without having to put/get them from scratch.

     The irqchip callbacks have been improved so that they can use only
     the fastpatch callbacks to enable/disable irqs like any normal
     irqchip, especially the gpiod_lock_as_irq() has been improved to be
     callable in fastpath context.

     A bunch of rework had to be done to achieve this but it is a big
     win since I never liked to restrict this to slowpath. The only call
     requireing slowpath was try_module_get() and this is kept at the
     .request_resources() slowpath callback. In the GPIO CEC driver this
     is a big win sine a single line is used for both outgoing and
     incoming traffic, and this needs to use IRQs for incoming traffic
     while actively driving the line for outgoing traffic.

   - Janusz Krzysztofik improved the GPIO array API to pass a "cookie"
     (struct gpio_array) and a bitmap for setting or getting multiple
     GPIO lines at once.

     This improvement orginated in a specific need to speed up an OMAP1
     driver and has led to a much better API and real performance gains
     when the state of the array can be used to bypass a lot of checks
     and code when we want things to go really fast.

     The previous code would minimize the number of calls down to the
     driver callbacks assuming the CPU speed was orders of magnitude
     faster than the I/O latency, but this assumption was wrong on
     several platforms: what we needed to do was to profile and improve
     the speed on the hot path of the array functions and this change is
     now completed.

   - Clean out the painful and hard to grasp BNF experiments from the
     device tree bindings. Future approaches are looking into using JSON
     schema for this purpose. (Rob Herring is floating a patch series.)

  New drivers:

   - The RCAR driver now supports r8a774a1 (RZ/G2M).

   - Synopsys GPIO via CREGs driver.

  Major improvements:

   - Modernization of the EP93xx driver to use irqdomain and other
     contemporary concepts.

   - The ingenic driver has been merged into the Ingenic pin control
     driver and removed from the GPIO subsystem.

   - Debounce support in the ftgpio010 driver"

* tag 'gpio-v4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (116 commits)
  gpio: Clarify kerneldoc on gpiochip_set_chained_irqchip()
  gpio: Remove unused 'irqchip' argument to gpiochip_set_cascaded_irqchip()
  gpio: Drop parent irq assignment during cascade setup
  mmc: pwrseq_simple: Fix incorrect handling of GPIO bitmap
  gpio: fix SNPS_CREG kconfig dependency warning
  gpiolib: Initialize gdev field before is used
  gpio: fix kernel-doc after devres.c file rename
  gpio: fix doc string for devm_gpiochip_add_data() to not talk about irq_chip
  gpio: syscon: Fix possible NULL ptr usage
  gpiolib: Show correct direction from the beginning
  pinctrl: msm: Use init_valid_mask exported function
  gpiolib: Add init_valid_mask exported function
  GPIO: add single-register GPIO via CREG driver
  dt-bindings: Document the Synopsys GPIO via CREG bindings
  gpio: mockup: use device properties instead of platform_data
  gpio: Slightly more helpful debugfs
  gpio: omap: Remove set but not used variable 'dev'
  gpio: omap: drop omap_gpio_list
  Accept partial 'gpio-line-names' property.
  gpio: omap: get rid of the conditional PM runtime calls
  ...
2018-10-23 08:45:05 +01:00
Mika Westerberg 5f5e4890d5 ACPI / property: Allow multiple property compatible _DSD entries
It is possible to have _DSD entries where the data is compatible with
device properties format but are using different GUID for various reasons.
In addition to that there can be many such _DSD entries for a single device
such as for PCIe root port used to host a Thunderbolt hierarchy:

    Scope (\_SB.PCI0.RP21)
    {
        Name (_DSD, Package () {
            ToUUID ("6211e2c0-58a3-4af3-90e1-927a4e0c55a4"),
            Package () {
                Package () {"HotPlugSupportInD3", 1}
            },

            ToUUID ("efcc06cc-73ac-4bc3-bff0-76143807c389"),
            Package () {
                Package () {"ExternalFacingPort", 1},
                Package () {"UID", 0 }
            }
        })
    }

More information about these new _DSD entries can be found in:

  https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports

To make these available for drivers via unified device property APIs,
modify ACPI property core so that it supports multiple _DSD entries
organized in a linked list. We also store GUID of each _DSD entry in struct
acpi_device_properties in case there is need to differentiate between
entries. The supported GUIDs are then listed in prp_guids array.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2018-10-02 16:04:40 -05:00
Linus Walleij dae5f0afcf gpio: Use SPDX header for core library
Use the SPDX headers and cut down on boilerplate to indicate the
license in the core gpiolib implementation.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-25 09:08:48 +02:00
Linus Walleij f13a0b0bb4 gpio: Get rid of legacy header
A bunch of core gpiolib files still include the <linux/gpio.h>
legacy API header for no good reason. After this only the
gpiolib-legacy.c file includes it, which is fine.

The sysfs ABI code has a pointless wrapper function around
gpio_to_desc() we can just loose.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-09-17 10:55:24 -07:00
Hans de Goede 78d3a92edb gpiolib-acpi: Register GpioInt ACPI event handlers from a late_initcall
GpioInt ACPI event handlers may see there IRQ triggered immediately
after requesting the IRQ (esp. level triggered ones). This means that they
may run before any other (builtin) drivers have had a chance to register
their OpRegion handlers, leading to errors like this:

[    1.133274] ACPI Error: No handler for Region [PMOP] ((____ptrval____)) [UserDefinedRegion] (20180531/evregion-132)
[    1.133286] ACPI Error: Region UserDefinedRegion (ID=141) has no handler (20180531/exfldio-265)
[    1.133297] ACPI Error: Method parse/execution failed \_SB.GPO2._L01, AE_NOT_EXIST (20180531/psparse-516)

We already defer the manual initial trigger of edge triggered interrupts
by running it from a late_initcall handler, this commit replaces this with
deferring the entire acpi_gpiochip_request_interrupts() call till then,
fixing the problem of some OpRegions not being registered yet.

Note that this removes the need to have a list of edge triggered handlers
which need to run, since the entire acpi_gpiochip_request_interrupts() call
is now delayed, acpi_gpiochip_request_interrupt() can call these directly
now.

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-29 13:32:00 +02:00
Andy Shevchenko 993b9bc5c4 gpiolib: acpi: Switch to cansleep version of GPIO library call
The commit ca876c7483

  ("gpiolib-acpi: make sure we trigger edge events at least once on boot")

added a initial value check for pin which is about to be locked as IRQ.
Unfortunately, not all GPIO drivers can do that atomically. Thus,
switch to cansleep version of the call. Otherwise we have a warning:

...
  WARNING: CPU: 2 PID: 1408 at drivers/gpio/gpiolib.c:2883 gpiod_get_value+0x46/0x50
...
  RIP: 0010:gpiod_get_value+0x46/0x50
...

The change tested on Intel Broxton with Whiskey Cove PMIC GPIO controller.

Fixes: ca876c7483 ("gpiolib-acpi: make sure we trigger edge events at least once on boot")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-29 13:29:01 +02:00
Linus Torvalds 2c20443ec2 ACPI updates for 4.19-rc1
- 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
  ...
2018-08-14 13:39:52 -07:00
Benjamin Tissoires ca876c7483 gpiolib-acpi: make sure we trigger edge events at least once on boot
On some systems using edge triggered ACPI Event Interrupts, the initial
state at boot is not setup by the firmware, instead relying on the edge
irq event handler running at least once to setup the initial state.

2 known examples of this are:

1) The Surface 3 has its _LID state controlled by an ACPI operation region
 triggered by a GPIO event:

 OperationRegion (GPOR, GeneralPurposeIo, Zero, One)
 Field (GPOR, ByteAcc, NoLock, Preserve)
 {
     Connection (
         GpioIo (Shared, PullNone, 0x0000, 0x0000, IoRestrictionNone,
             "\\_SB.GPO0", 0x00, ResourceConsumer, ,
             )
             {   // Pin list
                 0x004C
             }
     ),
     HELD,   1
 }

 Method (_E4C, 0, Serialized)  // _Exx: Edge-Triggered GPE
 {
     If ((HELD == One))
     {
         ^^LID.LIDB = One
     }
     Else
     {
         ^^LID.LIDB = Zero
         Notify (LID, 0x80) // Status Change
     }

     Notify (^^PCI0.SPI1.NTRG, One) // Device Check
 }

 Currently, the state of LIDB is wrong until the user actually closes or
 open the cover. We need to trigger the GPIO event once to update the
 internal ACPI state.

 Coincidentally, this also enables the Surface 2 integrated HID sensor hub
 which also requires an ACPI gpio operation region to start initialization.

2) Various Bay Trail based tablets come with an external USB mux and
 TI T1210B USB phy to enable USB gadget mode. The mux is controlled by a
 GPIO which is controlled by an edge triggered ACPI Event Interrupt which
 monitors the micro-USB ID pin.

 When the tablet is connected to a PC (or no cable is plugged in), the ID
 pin is high and the tablet should be in gadget mode. But the GPIO
 controlling the mux is initialized by the firmware so that the USB data
 lines are muxed to the host controller.

 This means that if the user wants to use gadget mode, the user needs to
 first plug in a host-cable to force the ID pin low and then unplug it
 and connect the tablet to a PC, to get the ACPI event handler to run and
 switch the mux to device mode,

This commit fixes both by running the event-handler once on boot.

Note that the running of the event-handler is done from a late_initcall,
this is done because the handler AML code may rely on OperationRegions
registered by other builtin drivers. This avoids errors like these:

[    0.133026] ACPI Error: No handler for Region [XSCG] ((____ptrval____)) [GenericSerialBus] (20180531/evregion-132)
[    0.133036] ACPI Error: Region GenericSerialBus (ID=9) has no handler (20180531/exfldio-265)
[    0.133046] ACPI Error: Method parse/execution failed \_SB.GPO2._E12, AE_NOT_EXIST (20180531/psparse-516)

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
[hdegoede: Document BYT USB mux reliance on initial trigger]
[hdegoede: Run event handler from a late_initcall, rather then immediately]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-01 11:45:10 +02:00
Sakari Ailus 977d5ad39f ACPI: Convert ACPI reference args to generic fwnode reference args
Convert all users of struct acpi_reference_args to more generic
fwnode_reference_args. This will

 1) avoid an ACPI specific references to device nodes with integer
    arguments as well as

 2) allow making references to nodes other than device nodes in ACPI.

As a by-product, convert the fwnode interger arguments to u64. The
arguments were 64-bit integers on ACPI but the fwnode arguments were
just 32-bit.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-07-23 12:44:52 +02:00
Linus Torvalds ef991796be This is the bulk of pin control changes for the v4.16 kernel cycle:
Core changes:
 
 - After lengthy discussions and partly due to my ignorance, we have
   merged a patch making pinctrl_force_default() and pinctrl_force_sleep()
   reprogram the states into the hardware of any hogged pins, even
   if they are already in the desired state. This only apply to hogged
   pins since groups of pins owned by drivers need to be managed by
   each driver, lest they could not do things like runtime PM and
   put pins to sleeping state even if the system as a whole is not
   in sleep.
 
 New drivers:
 
 - New driver for the Microsemi Ocelot SoC. This is used in ethernet
   switches.
 
 - The X-Powers AXP209 GPIO driver was extended to also deal with pin
   control and moved over from the GPIO subsystem. This circuit is
   a mixed-mode integrated circuit which is part of AllWinner designs.
 
 - New subdriver for the Qualcomm MSM8998 SoC, core of a high end
   mobile devices (phones) chipset.
 
 - New subdriver for the ST Microelectronics STM32MP157 MPU and
   STM32F769 MCU from the STM32 family.
 
 - New subdriver for the MediaTek MT7622 SoC. This is used for routers,
   repeater, gateways and such network infrastructure.
 
 - New subdriver for the NXP (former Freescale) i.MX 6ULL. This SoC has
   multimedia features and target "smart devices", I guess in-car
   entertainment, in-flight entertainment, industrial control panels etc.
 
 General improvements:
 
 - Incremental improvements on the SH-PFC subdrivers for things like
   the CAN bus.
 
 - Enable the glitch filter on Baytrail GPIOs used for interrupts.
 
 - Proper handling of pins to GPIO ranges on the Semtec SX150X
 
 - An IRQ setup ordering fix on MCP23S08.
 
 - A good set of janitorial coding style fixes.
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Merge tag 'pinctrl-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pin control updates from Linus Walleij:
 "This is the bulk of pin control changes for the v4.16 kernel cycle.
  Like with GPIO it is actually a bit calm this time.

  Core changes:

   - After lengthy discussions and partly due to my ignorance, we have
     merged a patch making pinctrl_force_default() and
     pinctrl_force_sleep() reprogram the states into the hardware of any
     hogged pins, even if they are already in the desired state.

     This only apply to hogged pins since groups of pins owned by
     drivers need to be managed by each driver, lest they could not do
     things like runtime PM and put pins to sleeping state even if the
     system as a whole is not in sleep.

  New drivers:

   - New driver for the Microsemi Ocelot SoC. This is used in ethernet
     switches.

   - The X-Powers AXP209 GPIO driver was extended to also deal with pin
     control and moved over from the GPIO subsystem. This circuit is a
     mixed-mode integrated circuit which is part of AllWinner designs.

   - New subdriver for the Qualcomm MSM8998 SoC, core of a high end
     mobile devices (phones) chipset.

   - New subdriver for the ST Microelectronics STM32MP157 MPU and
     STM32F769 MCU from the STM32 family.

   - New subdriver for the MediaTek MT7622 SoC. This is used for
     routers, repeater, gateways and such network infrastructure.

   - New subdriver for the NXP (former Freescale) i.MX 6ULL. This SoC
     has multimedia features and target "smart devices", I guess in-car
     entertainment, in-flight entertainment, industrial control panels
     etc.

  General improvements:

   - Incremental improvements on the SH-PFC subdrivers for things like
     the CAN bus.

   - Enable the glitch filter on Baytrail GPIOs used for interrupts.

   - Proper handling of pins to GPIO ranges on the Semtec SX150X

   - An IRQ setup ordering fix on MCP23S08.

   - A good set of janitorial coding style fixes"

* tag 'pinctrl-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (102 commits)
  pinctrl: mcp23s08: fix irq setup order
  pinctrl: Forward declare struct device
  pinctrl: sunxi: Use of_clk_get_parent_count() instead of open coding
  pinctrl: stm32: add STM32F769 MCU support
  pinctrl: sx150x: Add a static gpio/pinctrl pin range mapping
  pinctrl: sx150x: Register pinctrl before adding the gpiochip
  pinctrl: sx150x: Unregister the pinctrl on release
  pinctrl: ingenic: Remove redundant dev_err call in ingenic_pinctrl_probe()
  pinctrl: sprd: Use seq_putc() in sprd_pinconf_group_dbg_show()
  pinctrl: pinmux: Use seq_putc() in pinmux_pins_show()
  pinctrl: abx500: Use seq_putc() in abx500_gpio_dbg_show()
  pinctrl: mediatek: mt7622: align error handling of mtk_hw_get_value call
  pinctrl: mediatek: mt7622: fix potential uninitialized value being returned
  pinctrl: uniphier: refactor drive strength get/set functions
  pinctrl: imx7ulp: constify struct imx_cfg_params_decode
  pinctrl: imx: constify struct imx_pinctrl_soc_info
  pinctrl: imx7d: simplify imx7d_pinctrl_probe
  pinctrl: imx: use struct imx_pinctrl_soc_info as a const
  pinctrl: sunxi-pinctrl: fix pin funtion can not be match correctly.
  pinctrl: qcom: Add msm8998 pinctrl driver
  ...
2018-02-02 14:22:53 -08:00
Linus Torvalds 9798f5178f The is the bulk of GPIO changes for the v4.16 kernel cycle.
Core changes:
 
 - Disallow open drain and open source flags to be set
   simultaneously. This doesn't make electrical sense, and would
   the hardware actually respond to this setting, the result
   would be short circuit.
 
 - ACPI GPIO has a new core infrastructure for handling quirks.
   The quirks are there to deal with broken ACPI tables centrally
   instead of pushing the work to individual drivers. In the world
   of BIOS writers, the ACPI tables are perfect. Until they find a
   mistake in it. When such a mistake is found, we can patch it
   with a quirk. It should never happen, the problem is that it
   happens. So we accomodate for it.
 
 - Several documentation updates.
 
 - Revert the patch setting up initial direction state from
   reading the device. This was causing bad things for drivers
   that can't read status on all its pins. It is only affecting
   debugfs information quality.
 
 - Label descriptors with the device name if no explicit label is
   passed in.
 
 - Pave the ground for transitioning SPI and regulators to use
   GPIO descriptors by implementing some quirks in the device tree
   GPIO parsing code.
 
 New drivers:
 
 - New driver for the Access PCIe IDIO 24 family.
 
 Other:
 
 - Major refactorings and improvements to the GPIO mockup driver
   used for test and verification.
 
 - Moved the AXP209 driver over to pin control since it gained a
   pin control back-end. These patches will appear (with the same
   hashes) in the pin control pull request as well.
 
 - Convert the onewire GPIO driver w1-gpio to use descriptors.
   This is merged here since the W1 maintainers send very few
   pull requests and he ACKed it.
 
 - Start to clean up driver headers using <linux/gpio.h> to just
   use <linux/gpio/driver.h> as appropriate.
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Merge tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "The is the bulk of GPIO changes for the v4.16 kernel cycle. It is
  pretty calm this time around I think. I even got time to get to things
  like starting to clean up header includes.

  Core changes:

   - Disallow open drain and open source flags to be set simultaneously.
     This doesn't make electrical sense, and would the hardware actually
     respond to this setting, the result would be short circuit.

   - ACPI GPIO has a new core infrastructure for handling quirks. The
     quirks are there to deal with broken ACPI tables centrally instead
     of pushing the work to individual drivers. In the world of BIOS
     writers, the ACPI tables are perfect. Until they find a mistake in
     it. When such a mistake is found, we can patch it with a quirk. It
     should never happen, the problem is that it happens. So we
     accomodate for it.

   - Several documentation updates.

   - Revert the patch setting up initial direction state from reading
     the device. This was causing bad things for drivers that can't read
     status on all its pins. It is only affecting debugfs information
     quality.

   - Label descriptors with the device name if no explicit label is
     passed in.

   - Pave the ground for transitioning SPI and regulators to use GPIO
     descriptors by implementing some quirks in the device tree GPIO
     parsing code.

  New drivers:

   - New driver for the Access PCIe IDIO 24 family.

  Other:

   - Major refactorings and improvements to the GPIO mockup driver used
     for test and verification.

   - Moved the AXP209 driver over to pin control since it gained a pin
     control back-end. These patches will appear (with the same hashes)
     in the pin control pull request as well.

   - Convert the onewire GPIO driver w1-gpio to use descriptors. This is
     merged here since the W1 maintainers send very few pull requests
     and he ACKed it.

   - Start to clean up driver headers using <linux/gpio.h> to just use
     <linux/gpio/driver.h> as appropriate"

* tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (103 commits)
  gpio: Timestamp events in hardirq handler
  gpio: Fix kernel stack leak to userspace
  gpio: Fix a documentation spelling mistake
  gpio: Documentation update
  gpiolib: remove redundant initialization of pointer desc
  gpio: of: Fix NPE from OF flags
  gpio: stmpe: Delete an unnecessary variable initialisation in stmpe_gpio_probe()
  gpio: stmpe: Move an assignment in stmpe_gpio_probe()
  gpio: stmpe: Improve a size determination in stmpe_gpio_probe()
  gpio: stmpe: Use seq_putc() in stmpe_dbg_show()
  gpio: No NULL owner
  gpio: stmpe: i2c transfer are forbiden in atomic context
  gpio: davinci: Include proper header
  gpio: da905x: Include proper header
  gpio: cs5535: Include proper header
  gpio: crystalcove: Include proper header
  gpio: bt8xx: Include proper header
  gpio: bcm-kona: Include proper header
  gpio: arizona: Include proper header
  gpio: amd8111: Include proper header
  ...
2018-01-31 12:25:27 -08:00