[PATCH] gpio: mvebu: correctly set the value in direction_output()

[PATCH] gpio: mvebu: correctly set the value in direction_output()

[Thomas Petazzoni]

The ->direction_output() operation of gpio_chip is supposed to set the
direction to output but also to set the GPIO to an initial
value. Unfortunately, this last part was not done until now, causing
for example the LEDs to not be properly set to their default initial
value. This patch fixes this by calling the mvebu_gpio_set() function
from mvebu_gpio_direction_output() before configuring the GPIO as an
output GPIO.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

---
As this is a fix, it should most likely go into 3.7.
---
 drivers/gpio/gpio-mvebu.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 7a87412..eb42ab1 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -244,6 +244,8 @@ static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned pin,
 	if (ret)
 		return ret;
 
+	mvebu_gpio_set(chip, pin, value);
+
 	spin_lock_irqsave(&mvchip->lock, flags);
 	u = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
 	u &= ~(1 << pin);
-- 
1.7.9.5

[PATCH] gpio: mvebu: correctly set the value in direction_output()

[Linus Walleij]

On Tue, Oct 23, 2012 at 10:17 AM, Thomas Petazzoni
<thomas.petazzoni@free-electrons.com> wrote:

> The ->direction_output() operation of gpio_chip is supposed to set the
> direction to output but also to set the GPIO to an initial
> value. Unfortunately, this last part was not done until now, causing
> for example the LEDs to not be properly set to their default initial
> value. This patch fixes this by calling the mvebu_gpio_set() function
> from mvebu_gpio_direction_output() before configuring the GPIO as an
> output GPIO.
>
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
>
> ---
> As this is a fix, it should most likely go into 3.7.

Yes, thanks. Applied to my "fixes" branch.

Yours,
Linus Walleij