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gpiolib: acpi: Fix GPIO lookup using relative path

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ACPI allow to use relative path in resources, pass the device handle
to acpi_get_gpiod() to allow resolving such path.

Signed-off-by: Alban Bedel <alban.bedel@lht.dlh.de>
Acked-by: Mika Westerberg <westeri@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Alban Bedel 2026-10-01 17:23:43 +02:00 committed by Andy Shevchenko
parent 6da1f34374
commit 3fd4bf93d5
1 changed files with 6 additions and 4 deletions
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10
drivers/gpio/gpiolib-acpi-core.c
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@ -116,7 +116,8 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, const void *data)
/**
* acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API
* @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1")
* @parent: parent ACPI handle to resolve relative path
* @path: ACPI GPIO controller path name, (e.g. "\\_SB.GPO1" or "^GP01")
* @pin: ACPI GPIO pin number (0-based, controller-relative)
*
* Returns:
@ -128,12 +129,12 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, const void *data)
* controller does not have GPIO chip registered at the moment. This is to
* support probe deferral.
*/
static struct gpio_desc *acpi_get_gpiod(char *path, unsigned int pin)
static struct gpio_desc *acpi_get_gpiod(acpi_handle parent, char *path, unsigned int pin)
{
acpi_handle handle;
acpi_status status;
status = acpi_get_handle(NULL, path, &handle);
status = acpi_get_handle(parent, path, &handle);
if (ACPI_FAILURE(status))
return ERR_PTR(-ENODEV);
@ -733,7 +734,8 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
if (info->quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER)
desc = gpio_to_desc(agpio->pin_table[pin_index]);
else
desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
desc = acpi_get_gpiod(acpi_device_handle(info->adev),
agpio->resource_source.string_ptr,
agpio->pin_table[pin_index]);
lookup->desc = desc;
info->pin_config = agpio->pin_config;