adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2025-01-01 05:36:24 +00:00
Code Issues Projects Releases Packages Wiki Activity

[ARM] MXC: Fix mxc_gpio_get(), which must read PSR register instead DR.

Browse source 
The Data register holds the value we have written to a gpio. To
get the input value we must read the Pad Status Register MX3 (or Sample
Status register in MX1/2 terms)

Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Darius Augulis 2008-10-15 10:38:30 +02:00 committed by Sascha Hauer
parent eadefeff9c
commit 5cac9d6558
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
arch/arm/plat-mxc/gpio.c
View file

@ -188,7 +188,7 @@ static int mxc_gpio_get(struct gpio_chip *chip, unsigned offset)
struct mxc_gpio_port *port =
container_of(chip, struct mxc_gpio_port, chip);
return (__raw_readl(port->base + GPIO_DR) >> offset) & 1;
return (__raw_readl(port->base + GPIO_PSR) >> offset) & 1;
}
static int mxc_gpio_direction_input(struct gpio_chip *chip, unsigned offset)