diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2013-10-10 11:01:09 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-10-19 23:31:37 +0200 |
| commit | 81f59e9d138c3ba0bd0f97d4e14f856d987e3f1d (patch) | |
| tree | 5f7eaefa918749407da0958a97096eba56a42500 /drivers/gpio/gpiolib.c | |
| parent | 936e15dd2128eb5aa71251766f1176552b45f43c (diff) | |
| download | lwn-81f59e9d138c3ba0bd0f97d4e14f856d987e3f1d.tar.gz lwn-81f59e9d138c3ba0bd0f97d4e14f856d987e3f1d.zip | |
gpiolib / ACPI: add ACPI support for gpiod_get_index()
gpiod_get_index() and gpiod_get() are now the new preferred way to request
GPIOs. Add support for finding the corresponding GPIO descriptor from ACPI
namespace.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 9263c7b359b7..bee93c8c2361 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -10,6 +10,7 @@ #include <linux/seq_file.h> #include <linux/gpio.h> #include <linux/of_gpio.h> +#include <linux/acpi_gpio.h> #include <linux/idr.h> #include <linux/slab.h> @@ -2260,6 +2261,12 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, } #endif +static struct gpio_desc *acpi_find_gpio(struct device *dev, const char *con_id, + unsigned int idx, unsigned long *flags) +{ + return acpi_get_gpiod_by_index(dev, idx, NULL); +} + static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id, unsigned int idx, unsigned long *flags) { @@ -2361,6 +2368,9 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev, if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node) { dev_dbg(dev, "using device tree for GPIO lookup\n"); desc = of_find_gpio(dev, con_id, idx, &flags); + } else if (IS_ENABLED(CONFIG_ACPI) && dev && ACPI_HANDLE(dev)) { + dev_dbg(dev, "using ACPI for GPIO lookup\n"); + desc = acpi_find_gpio(dev, con_id, idx, &flags); } else { dev_dbg(dev, "using lookup tables for GPIO lookup"); desc = gpiod_find(dev, con_id, idx, &flags); |