diff options
| author | viresh kumar <viresh.kumar@st.com> | 2010-04-21 09:42:05 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-04-22 12:30:14 +0100 |
| commit | 64b997c5142a13373857de09599afd2f079c2f7a (patch) | |
| tree | d6abc0a71b1e2fa283d73050a0ea45e229c930eb | |
| parent | 9a99d55514d3c6bfc03e41536659d781af6998f5 (diff) | |
| download | linux-64b997c5142a13373857de09599afd2f079c2f7a.tar.bz2 | |
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>
| -rw-r--r-- | drivers/gpio/pl061.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpio/pl061.c b/drivers/gpio/pl061.c index cc3b5e0b595a..2196f318114c 100644 --- 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; |