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authorLinus Walleij <linus.walleij@linaro.org>2016-04-09 17:11:37 +0300
committerLinus Walleij <linus.walleij@linaro.org>2016-04-14 15:03:27 +0300
commitf90c6bdb690bb12f3dbe8eaa5650a9ce952d0290 (patch)
tree2b2266d86867d6f30fa1a43f7ab9adc645a17f29 /drivers/gpio/gpio-f7188x.c
parent148c864260dad94dd037d342679cd62f664a9b21 (diff)
downloadlinux-f90c6bdb690bb12f3dbe8eaa5650a9ce952d0290.tar.xz
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.c33
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.
*/