diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2016-04-09 16:11:37 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-04-14 14:03:27 +0200 |
| commit | f90c6bdb690bb12f3dbe8eaa5650a9ce952d0290 (patch) | |
| tree | 2b2266d86867d6f30fa1a43f7ab9adc645a17f29 /drivers/gpio/gpio-f7188x.c | |
| parent | gpio: f7188x: use BIT() macro (diff) | |
| download | linux-f90c6bdb690bb12f3dbe8eaa5650a9ce952d0290.tar.xz linux-f90c6bdb690bb12f3dbe8eaa5650a9ce952d0290.zip | |
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>
Diffstat (limited to 'drivers/gpio/gpio-f7188x.c')
| -rw-r--r-- | drivers/gpio/gpio-f7188x.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c index 8b10fbf787f8..58674ff75097 100644 --- a/drivers/gpio/gpio-f7188x.c +++ b/drivers/gpio/gpio-f7188x.c @@ -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. */ |