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Commit f90c6bdb authored by Linus Walleij's avatar Linus Walleij
Browse files

gpio: f7188x: use the new open drain callback 



The F7188x chips supports setting the pins in open drain mode.
Activate the new .set_single_ended() callback.

Cc: Peter Hung <hpeter@gmail.com>
Cc: Andreas Bofjall <andreas@gazonk.org>
Cc: Simon Guinot <simon.guinot@sequanux.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 148c8642

drivers/gpio/gpio-f7188x.c

+33 −0
Original line number Diff line number Diff line
@@ -130,6 +130,9 @@ static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset); 
static int f7188x_gpio_direction_out(struct gpio_chip *chip,

				     unsigned offset, int value);

static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);

static int f7188x_gpio_set_single_ended(struct gpio_chip *gc,

					unsigned offset,

					enum single_ended_mode mode);



#define F7188X_GPIO_BANK(_base, _ngpio, _regbase)			\

	{								\
@@ -140,6 +143,7 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value); 
			.get              = f7188x_gpio_get,		\

			.direction_output = f7188x_gpio_direction_out,	\

			.set              = f7188x_gpio_set,		\

			.set_single_ended = f7188x_gpio_set_single_ended, \

			.base             = _base,			\

			.ngpio            = _ngpio,			\

			.can_sleep        = true,			\
@@ -301,6 +305,35 @@ static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 
	superio_exit(sio->addr);

}



static int f7188x_gpio_set_single_ended(struct gpio_chip *chip,

					unsigned offset,

					enum single_ended_mode mode)

{

	int err;

	struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);

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

	u8 data;



	if (mode != LINE_MODE_OPEN_DRAIN &&

	    mode != LINE_MODE_PUSH_PULL)

		return -ENOTSUPP;



	err = superio_enter(sio->addr);

	if (err)

		return err;

	superio_select(sio->addr, SIO_LD_GPIO);



	data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));

	if (mode == LINE_MODE_OPEN_DRAIN)

		data &= ~BIT(offset);

	else

		data |= BIT(offset);

	superio_outb(sio->addr, gpio_data_mode(bank->regbase), data);



	superio_exit(sio->addr);

	return 0;

}



/*

 * Platform device and driver.

 */