diff options
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/gpio.h | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 128249e..7104454 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -83,7 +83,7 @@ int gpio_get_value(unsigned gpio); int gpio_set_value(unsigned gpio, int value); /* State of a GPIO, as reported by get_function() */ -enum { +enum gpio_func_t { GPIOF_INPUT = 0, GPIOF_OUTPUT, GPIOF_UNUSED, /* Not claimed */ @@ -96,6 +96,38 @@ enum { struct udevice; /** + * gpio_get_function() - get the current function for a GPIO pin + * + * Note this returns GPIOF_UNUSED if the GPIO is not requested. + * + * @dev: Device to check + * @offset: Offset of device GPIO to check + * @namep: If non-NULL, this is set to the nane given when the GPIO + * was requested, or -1 if it has not been requested + * @return -ENODATA if the driver returned an unknown function, + * -ENODEV if the device is not active, -EINVAL if the offset is invalid. + * GPIOF_UNUSED if the GPIO has not been requested. Otherwise returns the + * function from enum gpio_func_t. + */ +int gpio_get_function(struct udevice *dev, int offset, const char **namep); + +/** + * gpio_get_raw_function() - get the current raw function for a GPIO pin + * + * Note this does not return GPIOF_UNUSED - it will always return the GPIO + * driver's view of a pin function, even if it is not correctly set up. + * + * @dev: Device to check + * @offset: Offset of device GPIO to check + * @namep: If non-NULL, this is set to the nane given when the GPIO + * was requested, or -1 if it has not been requested + * @return -ENODATA if the driver returned an unknown function, + * -ENODEV if the device is not active, -EINVAL if the offset is invalid. + * Otherwise returns the function from enum gpio_func_t. + */ +int gpio_get_raw_function(struct udevice *dev, int offset, const char **namep); + +/** * struct struct dm_gpio_ops - Driver model GPIO operations * * Refer to functions above for description. These function largely copy |