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ACPICA: ACPI 6.2: Add support for PinGroupFunction() resource

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ACPICA commit bd9a745749eac7137cd23085e6bdeb322de14ea2

PinGroupFunction() is a new resource introduced with ACPI 6.2. It is
used with PinGroup() to configure specific mode for a set of pins
exposed by a GPIO controller.

The format of the resource is:

  PinGroupFunction (Shared/Exclusive, FunctionNumber, ResourceSource,
                    ResourceSourceIndex, ResourceSourceLabel,
                    ResourceUsage, DescriptorName, VendorData)

The resource_source and ResourceSourceLabel fields are used to specify
the PinGroup() resource referenced by PinGroupFunction().

  Device (GPIO)
  {
      Name (_CRS, ResourceTemplate () {
          PinGroup ("group1") {2, 3}
          PinGroup ("group2") {4, 5}
          ...
      })
  }

  Device (I2C)
  {
      Name (_CRS, ResourceTemplate () {
          PinGroupFunction (Exclusive, 6, "^GPIO", 0, "mygroup2")
      })
  }

In the above example the PinGroupFunction() references the second
PinGroup() resource (using label "mygroup2" and configures pins 4 and 5
into mode 6.

Link: https://github.com/acpica/acpica/commit/bd9a7457
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mika Westerberg
2017-06-05 16:39:31 +08:00
committed by Rafael J. Wysocki
parent fdaa098077
commit f8a6c86644
10 changed files with 182 additions and 2 deletions
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20
drivers/acpi/acpica/amlresrc.h
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@@ -464,6 +464,25 @@ struct aml_resource_pin_group {
#define AML_RESOURCE_PIN_GROUP_REVISION 1 /* ACPI 6.2 */
struct aml_resource_pin_group_function {
AML_RESOURCE_LARGE_HEADER_COMMON u8 revision_id;
u16 flags;
u16 function_number;
u8 res_source_index;
u16 res_source_offset;
u16 res_source_label_offset;
u16 vendor_offset;
u16 vendor_length;
/*
* Optional fields follow immediately:
* 1) Resource Source String
* 2) Resource Source Label String
* 3) Vendor Data bytes
*/
};
#define AML_RESOURCE_PIN_GROUP_FUNCTION_REVISION 1 /* ACPI 6.2 */
/* restore default alignment */
#pragma pack()
@@ -509,6 +528,7 @@ union aml_resource {
struct aml_resource_pin_function pin_function;
struct aml_resource_pin_config pin_config;
struct aml_resource_pin_group pin_group;
struct aml_resource_pin_group_function pin_group_function;
/* Utility overlays */