linux-toradex.git/drivers/acpi/irq.c, branch v6.7

ACPI: irq: Fix incorrect return value in acpi_register_gsi()

2023-10-18T11:11:04+00:00

acpi_register_gsi() should return a negative value in case of failure.

Currently, it returns the return value from irq_create_fwspec_mapping().
However, irq_create_fwspec_mapping() returns 0 for failure. Fix the
issue by returning -EINVAL if irq_create_fwspec_mapping() returns zero.

Fixes: d44fa3d46079 ("ACPI: Add support for ResourceSource/IRQ domain mapping")
Cc: 4.11+  # 4.11+
Signed-off-by: Sunil V L 
[ rjw: Rename a new local variable ]
Signed-off-by: Rafael J. Wysocki

ACPI: irq: Fix some kernel-doc issues

2022-11-10T19:21:35+00:00

The following commit change the second parameter of acpi_set_irq_model()
but forgot to update the function description. Let's fix it.

  commit 7327b16f5f56 ("APCI: irq: Add support for multiple GSI domains")

Also add description of parameter 'gsi' for
acpi_get_irq_source_fwhandle() to avoid the following build W=1 warning.

  drivers/acpi/irq.c:108: warning: Function parameter or member 'gsi' not described in 'acpi_get_irq_source_fwhandle'

Fixes: 7327b16f5f56 ("APCI: irq: Add support for multiple GSI domains")
Signed-off-by: Xiongfeng Wang 
Signed-off-by: Rafael J. Wysocki

Merge branches 'acpi-apei', 'acpi-wakeup', 'acpi-reboot' and 'acpi-thermal'

2022-10-10T16:11:11+00:00

Merge additional APEI changes, ACPI updates related to device wakeup and
system restart and ACPI thermal driver cleanups for 6.1-rc1:

 - Fix a memory leak in APEI by avoiding to add do not add task_work to
   kernel threads running when an asynchronous error is detected (Shuai
   Xue).

 - Add ACPI support for handling system wakeups via GPIO wake capable
   IRQs in addition to GPEs (Raul E Rangel).

 - Make the system reboot code put ACPI-enabled systems into the S5
   (system off) state which is necessary for some platforms to work as
   expected (Kai-Heng Feng).

 - Make the white space usage in the ACPI thermal driver more consistent
   and drop redundant code from it (Rafael Wysocki).

* acpi-apei:
  ACPI: APEI: do not add task_work to kernel thread to avoid memory leak

* acpi-wakeup:
  ACPI: PM: Take wake IRQ into consideration when entering suspend-to-idle
  i2c: acpi: Use ACPI wake capability bit to set wake_irq
  ACPI: resources: Add wake_capable parameter to acpi_dev_irq_flags
  gpiolib: acpi: Add wake_capable variants of acpi_dev_gpio_irq_get

* acpi-reboot:
  PM: ACPI: reboot: Reinstate S5 for reboot
  kernel/reboot: Add SYS_OFF_MODE_RESTART_PREPARE mode

* acpi-thermal:
  ACPI: thermal: Drop some redundant code
  ACPI: thermal: Drop redundant parens from expressions
  ACPI: thermal: Use white space more consistently

ACPI: resources: Add wake_capable parameter to acpi_dev_irq_flags

2022-10-04T13:41:12+00:00

ACPI IRQ/Interrupt resources contain a bit that describes if the
interrupt should wake the system. This change exposes that bit via
a new IORESOURCE_IRQ_WAKECAPABLE flag. Drivers should check this flag
before arming an IRQ to wake the system.

Signed-off-by: Raul E Rangel 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Rafael J. Wysocki

ACPI: Rename acpi_bus_get/put_acpi_device()

2022-08-23T16:19:27+00:00

Because acpi_bus_get_acpi_device() is completely analogous to
acpi_fetch_acpi_dev(), rename it to acpi_get_acpi_dev() and
add a kerneldoc comment to it.

Accordingly, rename acpi_bus_put_acpi_device() to acpi_put_acpi_dev()
and update all of the users of these two functions.

While at it, move the acpi_fetch_acpi_dev() header next to the
acpi_get_acpi_dev() header in the header file holding them.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Guenter Roeck 
Reviewed-by: Punit Agrawal

ACPI: irq: Allow acpi_gsi_to_irq() to have an arch-specific fallback

2022-07-20T11:05:17+00:00

It appears that the generic version of acpi_gsi_to_irq() doesn't
fallback to establishing a mapping if there is no pre-existing
one while the x86 version does.

While arm64 seems unaffected by it, LoongArch is relying on the x86
behaviour. In an effort to prevent new architectures from reinventing
the proverbial wheel, provide an optional callback that the arch code
can set to restore the x86 behaviour.

Hopefully we can eventually get rid of this in the future once
the expected behaviour has been clarified.

Reported-by: Jianmin Lv 
Signed-off-by: Marc Zyngier 
Signed-off-by: Jianmin Lv 
Tested-by: Hanjun Guo 
Reviewed-by: Hanjun Guo 
Link: https://lore.kernel.org/r/1658314292-35346-4-git-send-email-lvjianmin@loongson.cn

APCI: irq: Add support for multiple GSI domains

2022-07-20T11:05:17+00:00

In an unfortunate departure from the ACPI spec, the LoongArch
architecture split its GSI space across multiple interrupt
controllers.

In order to be able to reuse the core code and prevent
architectures from reinventing an already square wheel, offer
the arch code the ability to register a dispatcher function
that will return the domain fwnode for a given GSI.

The ARM GIC drivers are updated to support this (with a single
domain, as intended).

Signed-off-by: Marc Zyngier 
Cc: Hanjun Guo 
Cc: Lorenzo Pieralisi 
Signed-off-by: Jianmin Lv 
Tested-by: Hanjun Guo 
Reviewed-by: Hanjun Guo 
Link: https://lore.kernel.org/r/1658314292-35346-3-git-send-email-lvjianmin@loongson.cn

ACPI: irq: Prevent unregistering of GIC SGIs

2021-04-23T17:00:52+00:00

When using ACPI on arm64, which implies the GIC IRQ model, no
table should ever provide a GSI number in the range [0:15],
as these are reserved for IPIs.

However, drivers tend to call acpi_unregister_gsi() with any
random GSI number provided by half baked tables, which results
in an exploding kernel when its IPIs have been unconfigured.

In order to catch this, check for the silly case early, warn
that something is going wrong and avoid the above disaster.

Signed-off-by: Marc Zyngier 
Reviewed-by: Sudeep Holla 
Tested-by: dann frazier 
Tested-by: Hanjun Guo 
Reviewed-by: Hanjun Guo 
Reviewed-by: Lorenzo Pieralisi 
Link: https://lore.kernel.org/r/20210421164317.1718831-3-maz@kernel.org
Signed-off-by: Catalin Marinas

Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-07-08T18:01:13+00:00

Pull irq updates from Thomas Gleixner:
 "The irq departement provides the usual mixed bag:

  Core:

   - Further improvements to the irq timings code which aims to predict
     the next interrupt for power state selection to achieve better
     latency/power balance

   - Add interrupt statistics to the core NMI handlers

   - The usual small fixes and cleanups

  Drivers:

   - Support for Renesas RZ/A1, Annapurna Labs FIC, Meson-G12A SoC and
     Amazon Gravition AMR/GIC interrupt controllers.

   - Rework of the Renesas INTC controller driver

   - ACPI support for Socionext SoCs

   - Enhancements to the CSKY interrupt controller

   - The usual small fixes and cleanups"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
  irq/irqdomain: Fix comment typo
  genirq: Update irq stats from NMI handlers
  irqchip/gic-pm: Remove PM_CLK dependency
  irqchip/al-fic: Introduce Amazon's Annapurna Labs Fabric Interrupt Controller Driver
  dt-bindings: interrupt-controller: Add Amazon's Annapurna Labs FIC
  softirq: Use __this_cpu_write() in takeover_tasklets()
  irqchip/mbigen: Stop printing kernel addresses
  irqchip/gic: Add dependency for ARM_GIC_MAX_NR
  genirq/affinity: Remove unused argument from [__]irq_build_affinity_masks()
  genirq/timings: Add selftest for next event computation
  genirq/timings: Add selftest for irqs circular buffer
  genirq/timings: Add selftest for circular array
  genirq/timings: Encapsulate storing function
  genirq/timings: Encapsulate timings push
  genirq/timings: Optimize the period detection speed
  genirq/timings: Fix timings buffer inspection
  genirq/timings: Fix next event index function
  irqchip/qcom: Use struct_size() in devm_kzalloc()
  irqchip/irq-csky-mpintc: Remove unnecessary loop in interrupt handler
  dt-bindings: interrupt-controller: Update csky mpintc
  ...

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman