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| author |   Daniel Scally <djrscally@gmail.com> | 2021-06-03 23:40:04 +0100 |
|---|---|---|
| committer |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-06-04 16:24:19 +0300 |
| commit | 43582f29b161d820717bc13f562bca27af12e3cf (patch) | |
| tree | 75477f0f5b79f101d2158ebd70f3d58908dc633a /include/linux/gpio | |
| parent | gpio: wcove: Split error handling for CTRL and IRQ registers (diff) | |
| download | linux-dev-43582f29b161d820717bc13f562bca27af12e3cf.tar.xz linux-dev-43582f29b161d820717bc13f562bca27af12e3cf.zip | |
gpiolib: acpi: Introduce acpi_get_and_request_gpiod() helper
We need to be able to translate GPIO resources in an ACPI device's _CRS
into GPIO descriptor array. Those are represented in _CRS as a pathname
to a GPIO device plus the pin's index number: the acpi_get_gpiod()
function is perfect for that purpose.
As it's currently only used internally within the GPIO layer, provide and
export a wrapper function that additionally holds a reference to the GPIO
device.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'include/linux/gpio')
| -rw-r--r-- | include/linux/gpio/consumer.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index c73b25bc9213..566feb56601f 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -692,6 +692,8 @@ int devm_acpi_dev_add_driver_gpios(struct device *dev, const struct acpi_gpio_mapping *gpios); void devm_acpi_dev_remove_driver_gpios(struct device *dev); +struct gpio_desc *acpi_get_and_request_gpiod(char *path, int pin, char *label); + #else /* CONFIG_GPIOLIB && CONFIG_ACPI */ struct acpi_device; |