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Commit 9370084e authored by Yegor Yefremov's avatar Yegor Yefremov Committed by Linus Walleij
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gpio: omap: implement get_direction 



This patch implements gpio_chip's get_direction() routine, that
lets other drivers get particular GPIOs direction using
struct gpio_desc.

Signed-off-by: default avatarYegor Yefremov <yegorslists@googlemail.com>
Acked-by: default avatarJavier Martinez Canillas <javier@dowhile0.org>
Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: default avatarTony Lindgren <tony@atomide.com>
Reviewed-by: default avatarKevin Hilman <khilman@linaro.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 47a95fe7

drivers/gpio/gpio-omap.c

+17 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/of_device.h>

#include <linux/irqchip/chained_irq.h>

#include <linux/gpio.h>

#include <linux/bitops.h>

#include <linux/platform_data/gpio-omap.h>



#define OFF_MODE	1
@@ -927,6 +928,21 @@ static inline void mpuio_init(struct gpio_bank *bank) 


/*---------------------------------------------------------------------*/



static int gpio_get_direction(struct gpio_chip *chip, unsigned offset)

{

	struct gpio_bank *bank;

	unsigned long flags;

	void __iomem *reg;

	int dir;



	bank = container_of(chip, struct gpio_bank, chip);

	reg = bank->base + bank->regs->direction;

	spin_lock_irqsave(&bank->lock, flags);

	dir = !!(readl_relaxed(reg) & BIT(offset));

	spin_unlock_irqrestore(&bank->lock, flags);

	return dir;

}



static int gpio_input(struct gpio_chip *chip, unsigned offset)

{

	struct gpio_bank *bank;
@@ -1085,6 +1101,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank) 
	 */

	bank->chip.request = omap_gpio_request;

	bank->chip.free = omap_gpio_free;

	bank->chip.get_direction = gpio_get_direction;

	bank->chip.direction_input = gpio_input;

	bank->chip.get = gpio_get;

	bank->chip.direction_output = gpio_output;