diff options
Diffstat (limited to 'include/dt-bindings/gpio')
| -rw-r--r-- | include/dt-bindings/gpio/gpio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/dt-bindings/gpio/gpio.h b/include/dt-bindings/gpio/gpio.h index e6b1e0a80..c673d2c87 100644 --- a/include/dt-bindings/gpio/gpio.h +++ b/include/dt-bindings/gpio/gpio.h @@ -9,7 +9,19 @@ #ifndef _DT_BINDINGS_GPIO_GPIO_H #define _DT_BINDINGS_GPIO_GPIO_H +/* Bit 0 express polarity */ #define GPIO_ACTIVE_HIGH 0 #define GPIO_ACTIVE_LOW 1 +/* Bit 1 express single-endedness */ +#define GPIO_PUSH_PULL 0 +#define GPIO_SINGLE_ENDED 2 + +/* + * Open Drain/Collector is the combination of single-ended active low, + * Open Source/Emitter is the combination of single-ended active high. + */ +#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_ACTIVE_LOW) +#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_ACTIVE_HIGH) + #endif |