diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2013-10-10 10:01:10 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-10-19 23:32:14 +0200 |
| commit | e01f440a689aeb2d0e81c696fe2069f8d01d5d49 (patch) | |
| tree | 656695ddd5ab89bf661b5d1a721d3f086328fcea /drivers/gpio | |
| parent | gpiolib / ACPI: add ACPI support for gpiod_get_index() (diff) | |
| download | linux-e01f440a689aeb2d0e81c696fe2069f8d01d5d49.tar.xz linux-e01f440a689aeb2d0e81c696fe2069f8d01d5d49.zip | |
gpiolib / ACPI: allow passing GPIOF_ACTIVE_LOW for GpioInt resources
The ACPI GpioInt resources contain polarity field that is used to specify
whether the interrupt is active high or low. Since gpiolib supports
GPIOF_ACTIVE_LOW we can pass this information in the flags field in
acpi_find_gpio(), analogous to the DeviceTree version.
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')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 2 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.c | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 03187d0a3045..ae0ffdce8bd5 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -253,6 +253,8 @@ static int acpi_find_gpio(struct acpi_resource *ares, void *data) agpio->pin_table[0]); lookup->info.gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; + lookup->info.active_low = + agpio->polarity == ACPI_ACTIVE_LOW; } return 1; diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index bee93c8c2361..9f3326b95e60 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2264,7 +2264,17 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, 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); + struct acpi_gpio_info info; + struct gpio_desc *desc; + + desc = acpi_get_gpiod_by_index(dev, idx, &info); + if (IS_ERR(desc)) + return desc; + + if (info.gpioint && info.active_low) + *flags |= GPIOF_ACTIVE_LOW; + + return desc; } static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id, |