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gpiolib: acpi: Program debounce when finding GPIO

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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: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Mario Limonciello (AMD) 2025-08-20 18:33:11 -05:00 committed by Andy Shevchenko
parent 8f5ae30d69
commit 16c07342b5
1 changed files with 7 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/gpio/gpiolib-acpi-core.c
View file

@ -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;
}