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pinctrl: samsung: Add GPIO to IRQ translation

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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>
This commit is contained in:
Tomasz Figa 2012-10-11 10:11:20 +02:00 committed by Linus Walleij
parent 22b9ba033b
commit a19fe2d45c
1 changed files with 19 additions and 0 deletions
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19
drivers/pinctrl/pinctrl-samsung.c
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@ -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"
@ -527,6 +528,23 @@ static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
return pinctrl_gpio_direction_output(gc->base + 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,
};