ARM: 6060/1: PL061 GPIO: Setting gpio val after changing direction to OUT.

pl061_direction_output doesn't set value of gpio to value passed to it.
This patch sets value of GPIO pin to requested value after changing direction
to OUT.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/gpio/pl061.c b/drivers/gpio/pl061.c
index cc3b5e0..2196f31 100644 (file)
--- a/drivers/gpio/pl061.c
+++ b/drivers/gpio/pl061.c
@@ -91,6 +91,12 @@ static int pl061_direction_output(struct gpio_chip *gc, unsigned offset,
        gpiodir = readb(chip->base + GPIODIR);
        gpiodir |= 1 << offset;
        writeb(gpiodir, chip->base + GPIODIR);
+
+       /*
+        * gpio value is set again, because pl061 doesn't allow to set value of
+        * a gpio pin before configuring it in OUT mode.
+        */
+       writeb(!!value << offset, chip->base + (1 << (offset + 2)));
        spin_unlock_irqrestore(&chip->lock, flags);
 
        return 0;