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 <[email protected]>
---
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;
}
--
2.1.1
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