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Commit a19fe2d4 authored by Tomasz Figa's avatar Tomasz Figa Committed by Linus Walleij
Browse files

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: default avatarTomasz Figa <t.figa@samsung.com>
Reviewed-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Acked-by: default avatarThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 22b9ba03

drivers/pinctrl/pinctrl-samsung.c

+19 −0
Original line number Diff line number Diff line
@@ -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,

};