Thread (20 messages) 20 messages, 4 authors, 2025-06-25

Re: [PATCH 1/2] gpiolib: acpi: Program debounce when finding GPIO

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2025-06-25 12:19:35
Also in: linux-acpi, linux-gpio, lkml

On Tue, Jun 24, 2025 at 03:22:10PM -0500, Mario Limonciello wrote:
From: Mario Limonciello <mario.limonciello@amd.com>

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.
If this will be needed we can factor out acpi_gpio_set_debounce() with
the warning and use it in both cases.

-- 
With Best Regards,
Andy Shevchenko

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