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From: Greg KH on 12 Mar 2010 20:30
2.6.33-stable review patch. If anyone has any objections, please let me know.

-----------------

From: Mark Brown <broonie(a)opensource.wolfsonmicro.com>

commit 3383d23d86791503559cb87837491af37469d9e5 upstream.

wm831x_gpio_direction_output() ignored the state passed into it.

Signed-off-by: Mark Brown <broonie(a)opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo(a)linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
drivers/gpio/wm831x-gpio.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)

--- a/drivers/gpio/wm831x-gpio.c
+++ b/drivers/gpio/wm831x-gpio.c
@@ -60,23 +60,31 @@ static int wm831x_gpio_get(struct gpio_c
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)


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