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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-02-17 21:04:35 +0300
committerSamuel Ortiz <sameo@linux.intel.com>2010-03-08 00:17:28 +0300
commit3383d23d86791503559cb87837491af37469d9e5 (patch)
tree81755ca266174145fac1c14b5cf4ab9499d505ce /drivers/gpio
parent7ee422dc6e947fcdc153246d47f26ae0b7cf083d (diff)
downloadlinux-3383d23d86791503559cb87837491af37469d9e5.tar.xz
gpiolib: Actually set output state in wm831x_gpio_direction_output()
wm831x_gpio_direction_output() ignored the state passed into it. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@kernel.org Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/wm831x-gpio.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/gpio/wm831x-gpio.c b/drivers/gpio/wm831x-gpio.c
index b4468b616890..c5a00f7a7bf0 100644
--- a/drivers/gpio/wm831x-gpio.c
+++ b/drivers/gpio/wm831x-gpio.c
@@ -60,23 +60,31 @@ static int wm831x_gpio_get(struct gpio_chip *chip, unsigned offset)
return 0;
}
-static int wm831x_gpio_direction_out(struct gpio_chip *chip,
- unsigned offset, int value)
+static void wm831x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip);
struct wm831x *wm831x = wm831x_gpio->wm831x;
- return wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + offset,
- WM831X_GPN_DIR | WM831X_GPN_TRI, 0);
+ wm831x_set_bits(wm831x, WM831X_GPIO_LEVEL, 1 << offset,
+ value << offset);
}
-static void wm831x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int wm831x_gpio_direction_out(struct gpio_chip *chip,
+ unsigned offset, int value)
{
struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip);
struct wm831x *wm831x = wm831x_gpio->wm831x;
+ int ret;
- wm831x_set_bits(wm831x, WM831X_GPIO_LEVEL, 1 << offset,
- value << offset);
+ ret = wm831x_set_bits(wm831x, WM831X_GPIO1_CONTROL + offset,
+ WM831X_GPN_DIR | WM831X_GPN_TRI, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Can only set GPIO state once it's in output mode */
+ wm831x_gpio_set(chip, offset, value);
+
+ return 0;
}
static int wm831x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)