Commit 107cdd2d authored by plr.vincent@gmail.com's avatar plr.vincent@gmail.com Committed by Linus Walleij
Browse files

gpio: f7188x: Implement get_direction. 



Avoids gpiolib assumptions on initial pin direction, allowing user to observe
power-on settings.

Signed-off-by: default avatarVincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 6b891a26

drivers/gpio/gpio-f7188x.c

+22 −0
Original line number Diff line number Diff line
@@ -125,6 +125,7 @@ static inline void superio_exit(int base) 
 * GPIO chip.

 */



static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);

static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);

static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);

static int f7188x_gpio_direction_out(struct gpio_chip *chip,
@@ -139,6 +140,7 @@ static int f7188x_gpio_set_single_ended(struct gpio_chip *gc, 
		.chip = {						\

			.label            = DRVNAME,			\

			.owner            = THIS_MODULE,		\

			.get_direction    = f7188x_gpio_get_direction,	\

			.direction_input  = f7188x_gpio_direction_in,	\

			.get              = f7188x_gpio_get,		\

			.direction_output = f7188x_gpio_direction_out,	\
@@ -209,6 +211,26 @@ static struct f7188x_gpio_bank f81866_gpio_bank[] = { 
	F7188X_GPIO_BANK(80, 8, 0x88),

};



static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)

{

	int err;

	struct f7188x_gpio_bank *bank =

		container_of(chip, struct f7188x_gpio_bank, chip);

	struct f7188x_sio *sio = bank->data->sio;

	u8 dir;



	err = superio_enter(sio->addr);

	if (err)

		return err;

	superio_select(sio->addr, SIO_LD_GPIO);



	dir = superio_inb(sio->addr, gpio_dir(bank->regbase));



	superio_exit(sio->addr);



	return !(dir & 1 << offset);

}



static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)

{

	int err;