The patch adds an accessor function to get the value of a gpio.
Signed-off-by: Stefano Babic <sba...@denx.de>
---
arch/arm/include/asm/arch-mx31/mx31.h | 5 +++++
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;
+}
--
1.6.3.3
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