On Tue, May 23, 2017 at 08:03:24PM +0300, Andy Shevchenko wrote:
> The helper does retrieve pointer to struct acpi_resource_gpio from
> struct acpi_resource if it represents GpioInt() resource.
>
> It will be used by PNP code later on.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> drivers/gpio/gpiolib-acpi.c | 23 ++++++++++++++++++-----
> include/linux/acpi.h | 7 +++++++
> 2 files changed, 25 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
> index e431222edc2b..6bea176b066c 100644
> --- a/drivers/gpio/gpiolib-acpi.c
> +++ b/drivers/gpio/gpiolib-acpi.c
> @@ -165,6 +165,23 @@ static void acpi_gpio_chip_dh(acpi_handle handle, void *data)
> /* The address of this function is used as a key. */
> }
Since this is exported, it might be good idea to provide kernel-doc
here.
Anyway,
Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
> +bool acpi_gpio_get_irq_resource(struct acpi_resource *ares,
> + struct acpi_resource_gpio **agpio)
> +{
> + struct acpi_resource_gpio *gpio;
> +
> + if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
> + return false;
> +
> + gpio = &ares->data.gpio;
> + if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT)
> + return false;
> +
> + *agpio = gpio;
> + return true;
> +}
> +EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource);
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