diff options
Diffstat (limited to 'roms/skiboot/platforms/rhesus/ec/gpio.h')
-rw-r--r-- | roms/skiboot/platforms/rhesus/ec/gpio.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/roms/skiboot/platforms/rhesus/ec/gpio.h b/roms/skiboot/platforms/rhesus/ec/gpio.h new file mode 100644 index 000000000..65d7d878a --- /dev/null +++ b/roms/skiboot/platforms/rhesus/ec/gpio.h @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: Apache-2.0 +/* Copyright 2013-2014 Google Corp. */ + +/** + * @file gpio.h + * + * @brief Public interface of the EC GPIO device driver + * + */ + +#ifndef __EC_GPIO_H_ +#define __EC_GPIO_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#define EC_GPIO_INPUT 0 +#define EC_GPIO_OUTPUT 1 +#define EC_GPIO_PULLUP_DISABLE 0 +#define EC_GPIO_PULLUP_ENABLE 1 + +// Sets up a GPIO as output or input. +// Returns: <0 on error +int ec_gpio_setup(EcGpioPort port, uint8_t pin, + int is_output, int pullup_enable); + +// Reads the current value of an input GPIO. +// Returns: GPIO value (0,1) or <0 on error. +int ec_gpio_read(EcGpioPort port, uint8_t pin); + +// Sets the driving value of an output GPIO. Port should already be set +// to output mode. +// Returns: <0 on error +int ec_gpio_set(EcGpioPort port, uint8_t pin, int val); + +#ifdef __cplusplus +} +#endif + +#endif // __EC_GPIO_H_ |