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    Subject[PATCH v2 5/7] gpio: gpiolib-acpi: Export acpi_get_gpiod()
    Date
    I need to be able to translate GPIO resources in an acpi_device's _CRS
    into gpio_descs. Those are represented in _CRS as a pathname to a GPIO
    device plus the pin's index number: this function is perfect for that
    purpose.

    Signed-off-by: Daniel Scally <djrscally@gmail.com>
    ---
    Changes in v2:

    -None

    drivers/gpio/gpiolib-acpi.c | 3 ++-
    include/linux/acpi.h | 5 +++++
    2 files changed, 7 insertions(+), 1 deletion(-)

    diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
    index e37a57d0a2f0..83f9f85cd0ab 100644
    --- a/drivers/gpio/gpiolib-acpi.c
    +++ b/drivers/gpio/gpiolib-acpi.c
    @@ -111,7 +111,7 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
    * controller does not have GPIO chip registered at the moment. This is to
    * support probe deferral.
    */
    -static struct gpio_desc *acpi_get_gpiod(char *path, int pin)
    +struct gpio_desc *acpi_get_gpiod(char *path, int pin)
    {
    struct gpio_chip *chip;
    acpi_handle handle;
    @@ -127,6 +127,7 @@ static struct gpio_desc *acpi_get_gpiod(char *path, int pin)

    return gpiochip_get_desc(chip, pin);
    }
    +EXPORT_SYMBOL_GPL(acpi_get_gpiod);

    static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
    {
    diff --git a/include/linux/acpi.h b/include/linux/acpi.h
    index 2630c2e953f7..5cd272326eb7 100644
    --- a/include/linux/acpi.h
    +++ b/include/linux/acpi.h
    @@ -1066,6 +1066,7 @@ void __acpi_handle_debug(struct _ddebug *descriptor, acpi_handle handle, const c
    bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
    struct acpi_resource_gpio **agpio);
    int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index);
    +struct gpio_desc *acpi_get_gpiod(char *path, int pin);
    #else
    static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
    struct acpi_resource_gpio **agpio)
    @@ -1076,6 +1077,10 @@ static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index)
    {
    return -ENXIO;
    }
    +struct gpio_desc *acpi_get_gpiod(char *path, int pin)
    +{
    + return NULL;
    +}
    #endif

    /* Device properties */
    --
    2.25.1
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