Merge tag 'gpio-updates-for-v5.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:

 - new driver for the Realtek Otto GPIO controller

 - ACPI support for gpio-mpc8xxx

 - edge event support for gpio-sch (+ Kconfig fixes)

 - Kconfig improvements in gpio-ich

 - fixes to older issues in gpio-mockup

 - ACPI quirk for ignoring EC wakeups on Dell Venue 10 Pro 5055

 - improve the GPIO aggregator code by using more generic interfaces
   instead of reimplementing them in the driver

 - convert the DT bindings for gpio-74x164 to yaml

 - documentation improvements

 - a slew of other minor fixes and improvements to GPIO drivers

* tag 'gpio-updates-for-v5.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (34 commits)
  dt-bindings: gpio: add YAML description for rockchip,gpio-bank
  gpio: mxs: remove useless function
  dt-bindings: gpio: fairchild,74hc595: Convert to json-schema
  gpio: it87: remove unused code
  gpio: 104-dio-48e: Fix coding style issues
  gpio: mpc8xxx: Add ACPI support
  gpio: ich: Switch to be dependent on LPC_ICH
  gpio: sch: Drop MFD_CORE selection
  gpio: sch: depends on LPC_SCH
  gpiolib: acpi: Add quirk to ignore EC wakeups on Dell Venue 10 Pro 5055
  gpio: sch: Hook into ACPI GPE handler to catch GPIO edge events
  gpio: sch: Add edge event support
  gpio: aggregator: Replace custom get_arg() with a generic next_arg()
  lib/cmdline: Export next_arg() for being used in modules
  gpio: omap: Use device_get_match_data() helper
  gpio: Add Realtek Otto GPIO support
  dt-bindings: gpio: Binding for Realtek Otto GPIO
  docs: kernel-parameters: Add gpio_mockup_named_lines
  docs: kernel-parameters: Move gpio-mockup for alphabetic order
  lib: bitmap: provide devm_bitmap_alloc() and devm_bitmap_zalloc()
  ...
This commit is contained in:
Linus Torvalds
2021-05-05 12:39:29 -07:00
33 changed files with 1067 additions and 349 deletions

View File

@@ -42,10 +42,10 @@ irq_domain usage
================
An interrupt controller driver creates and registers an irq_domain by
calling one of the irq_domain_add_*() functions (each mapping method
has a different allocator function, more on that later). The function
will return a pointer to the irq_domain on success. The caller must
provide the allocator function with an irq_domain_ops structure.
calling one of the irq_domain_add_*() or irq_domain_create_*() functions
(each mapping method has a different allocator function, more on that later).
The function will return a pointer to the irq_domain on success. The caller
must provide the allocator function with an irq_domain_ops structure.
In most cases, the irq_domain will begin empty without any mappings
between hwirq and IRQ numbers. Mappings are added to the irq_domain
@@ -147,6 +147,7 @@ Legacy
irq_domain_add_simple()
irq_domain_add_legacy()
irq_domain_add_legacy_isa()
irq_domain_create_simple()
irq_domain_create_legacy()
The Legacy mapping is a special case for drivers that already have a
@@ -169,13 +170,13 @@ supported. For example, ISA controllers would use the legacy map for
mapping Linux IRQs 0-15 so that existing ISA drivers get the correct IRQ
numbers.
Most users of legacy mappings should use irq_domain_add_simple() which
will use a legacy domain only if an IRQ range is supplied by the
system and will otherwise use a linear domain mapping. The semantics
of this call are such that if an IRQ range is specified then
Most users of legacy mappings should use irq_domain_add_simple() or
irq_domain_create_simple() which will use a legacy domain only if an IRQ range
is supplied by the system and will otherwise use a linear domain mapping.
The semantics of this call are such that if an IRQ range is specified then
descriptors will be allocated on-the-fly for it, and if no range is
specified it will fall through to irq_domain_add_linear() which means
*no* irq descriptors will be allocated.
specified it will fall through to irq_domain_add_linear() or
irq_domain_create_linear() which means *no* irq descriptors will be allocated.
A typical use case for simple domains is where an irqchip provider
is supporting both dynamic and static IRQ assignments.
@@ -186,6 +187,7 @@ that the driver using the simple domain call irq_create_mapping()
before any irq_find_mapping() since the latter will actually work
for the static IRQ assignment case.
irq_domain_add_simple() and irq_domain_create_simple() as well as
irq_domain_add_legacy() and irq_domain_create_legacy() are functionally
equivalent, except for the first argument is different - the former
accepts an Open Firmware specific 'struct device_node', while the latter