Commit 16c07342 authored by Mario Limonciello (AMD)'s avatar Mario Limonciello (AMD) Committed by Andy Shevchenko
Browse files

gpiolib: acpi: Program debounce when finding GPIO 



When soc-button-array looks up the GPIO to use it calls acpi_find_gpio()
which will parse _CRS.

acpi_find_gpio.cold (drivers/gpio/gpiolib-acpi-core.c:953)
gpiod_find_and_request (drivers/gpio/gpiolib.c:4598 drivers/gpio/gpiolib.c:4625)
gpiod_get_index (drivers/gpio/gpiolib.c:4877)

The GPIO is setup basically, but the debounce information is discarded.
The platform will assert what debounce should be in _CRS, so program it
at the time it's available.

Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarMario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 8f5ae30d

drivers/gpio/gpiolib-acpi-core.c

+7 −0
Original line number Diff line number Diff line
@@ -944,6 +944,7 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, 
	bool can_fallback = acpi_can_fallback_to_crs(adev, con_id);

	struct acpi_gpio_info info;

	struct gpio_desc *desc;

	int ret;



	desc = __acpi_find_gpio(fwnode, con_id, idx, can_fallback, &info);

	if (IS_ERR(desc))
@@ -957,6 +958,12 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, 


	acpi_gpio_update_gpiod_flags(dflags, &info);

	acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info);



	/* ACPI uses hundredths of milliseconds units */

	ret = gpio_set_debounce_timeout(desc, info.debounce * 10);

	if (ret)

		return ERR_PTR(ret);



	return desc;

}