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gpiolib / ACPI: allow passing GPIOF_ACTIVE_LOW for GpioInt resources

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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 <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Alexandre Courbot <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
This commit is contained in:
Mika Westerberg 2013-10-10 11:01:10 +03:00 • committed by Linus Walleij
commit e01f440a68
3 changed files with 15 additions and 1 deletions
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2
drivers/gpio/gpiolib-acpi.c
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@ -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;

12
drivers/gpio/gpiolib.c
View file

@ -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,