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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: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Linus Walleij 2016-04-09 16:11:37 +02:00
parent 148c864260
commit f90c6bdb69
1 changed files with 33 additions and 0 deletions
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33
drivers/gpio/gpio-f7188x.c
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@ -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.
*/