diff options
| author | Tomasz Figa <t.figa@samsung.com> | 2012-10-11 10:11:20 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2012-10-15 09:10:12 +0200 |
| commit | a19fe2d45cc550ca42a3b0be3e716a8452e4b0c6 (patch) | |
| tree | 61a08c16723f3cab0deeb89ff3ab753513916bb9 /drivers/pinctrl/pinctrl-samsung.c | |
| parent | 22b9ba033bb4401e4cceb69c9e1af74a4631dd74 (diff) | |
| download | linux-a19fe2d45cc550ca42a3b0be3e716a8452e4b0c6.tar.bz2 | |
pinctrl: samsung: Add GPIO to IRQ translation
Some drivers require a way to translate GPIO pins to their IRQ numbers.
This patch adds the .to_irq() gpiolib callback to pinctrl-samsung
driver, which creates (if not present yet) and returns an IRQ mapping
for given GPIO pin.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-samsung.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-samsung.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c index 0a38368edcd3..0db88bbbb2bb 100644 --- a/drivers/pinctrl/pinctrl-samsung.c +++ b/drivers/pinctrl/pinctrl-samsung.c @@ -26,6 +26,7 @@ #include <linux/slab.h> #include <linux/err.h> #include <linux/gpio.h> +#include <linux/irqdomain.h> #include "core.h" #include "pinctrl-samsung.h" @@ -528,6 +529,23 @@ static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset, } /* + * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin + * and a virtual IRQ, if not already present. + */ +static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset) +{ + struct samsung_pin_bank *bank = gc_to_pin_bank(gc); + unsigned int virq; + + if (!bank->irq_domain) + return -ENXIO; + + virq = irq_create_mapping(bank->irq_domain, offset); + + return (virq) ? : -ENXIO; +} + +/* * Parse the pin names listed in the 'samsung,pins' property and convert it * into a list of gpio numbers are create a pin group from it. */ @@ -755,6 +773,7 @@ static const struct gpio_chip samsung_gpiolib_chip = { .get = samsung_gpio_get, .direction_input = samsung_gpio_direction_input, .direction_output = samsung_gpio_direction_output, + .to_irq = samsung_gpio_to_irq, .owner = THIS_MODULE, }; |