diff options
| author | Stefano Babic <sbabic@denx.de> | 2010-04-13 12:07:00 +0200 |
|---|---|---|
| committer | trix <trix@windriver.com> | 2010-04-24 12:58:00 -0500 |
| commit | 83366790317042bf61c3260c7a61fd8a8fbf5db9 (patch) | |
| tree | 28f7a162da89cd6187d280f0cfa651aa45013a5a | |
| parent | 989359b3182cdd998b58c8cca92717263c8d513d (diff) | |
| download | u-boot-imx-83366790317042bf61c3260c7a61fd8a8fbf5db9.zip u-boot-imx-83366790317042bf61c3260c7a61fd8a8fbf5db9.tar.gz u-boot-imx-83366790317042bf61c3260c7a61fd8a8fbf5db9.tar.bz2 | |
MX31: add accessor function to get a gpio
The patch adds an accessor function to get the value of a gpio.
Signed-off-by: Stefano Babic <sbabic@denx.de>
| -rw-r--r-- | arch/arm/include/asm/arch-mx31/mx31.h | 5 | ||||
| -rw-r--r-- | drivers/gpio/mx31_gpio.c | 15 |
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx31/mx31.h b/arch/arm/include/asm/arch-mx31/mx31.h index 3cc4b35..f702d26 100644 --- a/arch/arm/include/asm/arch-mx31/mx31.h +++ b/arch/arm/include/asm/arch-mx31/mx31.h @@ -37,12 +37,17 @@ enum mx31_gpio_direction { extern int mx31_gpio_direction(unsigned int gpio, enum mx31_gpio_direction direction); extern void mx31_gpio_set(unsigned int gpio, unsigned int value); +extern int mx31_gpio_get(unsigned int gpio); #else static inline int mx31_gpio_direction(unsigned int gpio, enum mx31_gpio_direction direction) { return 1; } +static inline int mx31_gpio_get(unsigned int gpio) +{ + return 1; +} static inline void mx31_gpio_set(unsigned int gpio, unsigned int value) { } diff --git a/drivers/gpio/mx31_gpio.c b/drivers/gpio/mx31_gpio.c index 737aafa..b07f038 100644 --- a/drivers/gpio/mx31_gpio.c +++ b/drivers/gpio/mx31_gpio.c @@ -71,3 +71,18 @@ void mx31_gpio_set(unsigned int gpio, unsigned int value) l &= ~(1 << gpio); __REG(gpio_ports[port] + GPIO_DR) = l; } + +int mx31_gpio_get(unsigned int gpio) +{ + unsigned int port = gpio >> 5; + u32 l; + + if (port >= ARRAY_SIZE(gpio_ports)) + return -1; + + gpio &= 0x1f; + + l = (__REG(gpio_ports[port] + GPIO_DR) >> gpio) & 0x01; + + return l; +} |