diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-02-25 18:33:18 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2021-03-08 11:59:17 +0100 |
| commit | 62d5247d239d4b48762192a251c647d7c997616a (patch) | |
| tree | 4fec5cd62cf2471020dcfd2f0f773c2d9096f0a4 | |
| parent | 6e5d5791730b55a1f987e1db84b078b91eb49e99 (diff) | |
| download | sparc-62d5247d239d4b48762192a251c647d7c997616a.tar.gz | |
gpiolib: acpi: Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk
On some systems the ACPI tables has wrong pin number and instead of
having a relative one it provides an absolute one in the global GPIO
number space.
Add ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk to cope with such cases.
Fixes: ba8c90c61847 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2")
Depends-on: 0ea683931adb ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 7 | ||||
| -rw-r--r-- | include/linux/gpio/consumer.h | 2 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 86efa2d9bf7ff..0fa0127d50ec4 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -677,6 +677,7 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) if (!lookup->desc) { const struct acpi_resource_gpio *agpio = &ares->data.gpio; bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; + struct gpio_desc *desc; u16 pin_index; if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint) @@ -689,8 +690,12 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) if (pin_index >= agpio->pin_table_length) return 1; - lookup->desc = acpi_get_gpiod(agpio->resource_source.string_ptr, + if (lookup->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, agpio->pin_table[pin_index]); + lookup->desc = desc; lookup->info.pin_config = agpio->pin_config; lookup->info.debounce = agpio->debounce_timeout; lookup->info.gpioint = gpioint; diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index ef49307611d21..c73b25bc92134 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -674,6 +674,8 @@ struct acpi_gpio_mapping { * get GpioIo type explicitly, this quirk may be used. */ #define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1) +/* Use given pin as an absolute GPIO number in the system */ +#define ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER BIT(2) unsigned int quirks; }; |