[PATCH v3 2/4] gpiolib: acpi: Program debounce when finding GPIO

From: Mario Limonciello
Date: Wed Jun 25 2025 - 17:58:58 EST


From: Mario Limonciello <mario.limonciello@xxxxxxx>

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: Hans de Goede <hansg@xxxxxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
v2:
* Make non fatal by using helper from patch 1 (Andy)
---
drivers/gpio/gpiolib-acpi-core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpiolib-acpi-core.c b/drivers/gpio/gpiolib-acpi-core.c
index 1895e45bd9f16..15222bfc25bb2 100644
--- a/drivers/gpio/gpiolib-acpi-core.c
+++ b/drivers/gpio/gpiolib-acpi-core.c
@@ -962,6 +962,7 @@ 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_set_debounce_timeout(desc, info.debounce);
return desc;
}

--
2.43.0