Gitweb: http://git.kernel.org/linus/64b997c5142a13373857de09599afd2f079c2f7a
Commit: 64b997c5142a13373857de09599afd2f079c2f7a
Parent: 9a99d55514d3c6bfc03e41536659d781af6998f5
Author: viresh kumar <viresh.kumar@st.com>
AuthorDate: Wed Apr 21 09:42:05 2010 +0100
Committer: Russell King <rmk+kernel@arm.linux.org.uk>
CommitDate: Thu Apr 22 12:30:14 2010 +0100
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>
---
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 cc3b5e0..2196f31 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;
--
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
