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gpio: add polarity and pull up/down config flags

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This adds to the configuration flags for GPIO:

() Indicates the polarity of the pin, whether it should be
   normal or inversed.

() Enables pull up/pull down for the pin.

Change-Id: I2b0c57e5a539208aff7aeb4ea53050134ab404fd
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2015-09-17 15:56:47 -07:00 • committed by Anas Nashif
commit add6d78b0a
1 changed files with 13 additions and 0 deletions
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13
include/gpio.h
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@ -59,6 +59,19 @@ extern "C" {
#define GPIO_INT_EDGE (1 << 5) #define GPIO_INT_EDGE (1 << 5)
#define GPIO_INT_DOUBLE_EDGE (1 << 6) #define GPIO_INT_DOUBLE_EDGE (1 << 6)
/* Polarity of the GPIO (1 bit) */
#define GPIO_POL_POS 7
#define GPIO_POL_NORMAL (0 << GPIO_POL_POS)
#define GPIO_POL_INV (1 << GPIO_POL_POS)
#define GPIO_POL_MASK (1 << GPIO_POL_POS)
/* Pull-up/pull-down for GPIO (2 bits) */
#define GPIO_PUD_POS 8
#define GPIO_PUD_NORMAL (0 << GPIO_PUD_POS)
#define GPIO_PUD_PULL_UP (1 << GPIO_PUD_POS)
#define GPIO_PUD_PULL_DOWN (2 << GPIO_PUD_POS)
#define GPIO_PUD_MASK (3 << GPIO_PUD_POS)
/* application callback function signature*/ /* application callback function signature*/
typedef void (*gpio_callback_t)(struct device *port, uint32_t pin); typedef void (*gpio_callback_t)(struct device *port, uint32_t pin);