Re: [PATCH] ACPI / GPIO: Pass index to acpi_get_gpiod_by_index() when using properties

From: Alexandre Courbot
Date: Wed Oct 29 2014 - 03:42:16 EST


On 10/29/2014 06:59 AM, Rafael J. Wysocki wrote:
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?

Looks good to me!

Acked-by: Alexandre Courbot <acourbot@xxxxxxxxxx>

Since this looks like a bug fix, shouldn't this be squashed into the relevant patch of the device-properties set?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/