linux-kernel - [patch 061/123] gpiolib: Actually set output state in wm831x_gpio_direction

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Date:	Fri, 12 Mar 2010 16:12:39 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Samuel Ortiz <sameo@...ux.intel.com>
Subject: [patch 061/123] gpiolib: Actually set output state in wm831x_gpio_direction_output()

2.6.33-stable review patch.  If anyone has any objections, please let me know.

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

From: Mark Brown <broonie@...nsource.wolfsonmicro.com>

commit 3383d23d86791503559cb87837491af37469d9e5 upstream.

wm831x_gpio_direction_output() ignored the state passed into it.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.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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