On Tuesday, October 28, 2014 01:15:27 PM Mika Westerberg wrote:
> acpi_dev_add_driver_gpios() makes it possible to set up mapping between
> properties and ACPI GpioIo resources in a driver, so we can take index
> parameter in acpi_find_gpio() into use with _DSD device properties now.
>
> This index can be used to select a GPIO from a property with multiple
> GPIOs:
>
> Package () {
> "data-gpios",
> Package () {
> \_SB.GPIO, 0, 0, 0,
> \_SB.GPIO, 1, 0, 0,
> \_SB.GPIO, 2, 0, 1,
> }
> }
>
> In order to retrieve the last GPIO from a driver we can simply do:
>
> desc = devm_gpiod_get_index(dev, "data", 2);
>
> and so on.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Cool. :-)
Any objections anyone?
> ---
> This is on top of latest linux-pm/device-properties.
>
> drivers/gpio/gpiolib.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index fbf717a56b0a..58659dbe702a 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -1522,7 +1522,7 @@ static struct gpio_desc *acpi_find_gpio(struct device *dev, const char *con_id,
> suffixes[i]);
> }
>
> - desc = acpi_get_gpiod_by_index(adev, propname, 0, &info);
> + desc = acpi_get_gpiod_by_index(adev, propname, idx, &info);
> if (!IS_ERR(desc) || (PTR_ERR(desc) == -EPROBE_DEFER))
> break;
> }
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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