diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/gpio/consumer.h | 81 |
1 files changed, 65 insertions, 16 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index c349021e8e4f..81dafd7bed3d 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -18,30 +18,79 @@ struct gpio_desc; #ifdef CONFIG_GPIOLIB +#define GPIOD_FLAGS_BIT_DIR_SET BIT(0) +#define GPIOD_FLAGS_BIT_DIR_OUT BIT(1) +#define GPIOD_FLAGS_BIT_DIR_VAL BIT(2) + +/** + * Optional flags that can be passed to one of gpiod_* to configure direction + * and output value. These values cannot be OR'd. + */ +enum gpiod_flags { + GPIOD_ASIS = 0, + GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET, + GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT, + GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT | + GPIOD_FLAGS_BIT_DIR_VAL, +}; + /* Acquire and dispose GPIOs */ -struct gpio_desc *__must_check gpiod_get(struct device *dev, - const char *con_id); -struct gpio_desc *__must_check gpiod_get_index(struct device *dev, +struct gpio_desc *__must_check __gpiod_get(struct device *dev, + const char *con_id, + enum gpiod_flags flags); +#define __gpiod_get(dev, con_id, flags, ...) __gpiod_get(dev, con_id, flags) +#define gpiod_get(varargs...) __gpiod_get(varargs, 0) +struct gpio_desc *__must_check __gpiod_get_index(struct device *dev, const char *con_id, - unsigned int idx); -struct gpio_desc *__must_check gpiod_get_optional(struct device *dev, - const char *con_id); -struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev, + unsigned int idx, + enum gpiod_flags flags); +#define __gpiod_get_index(dev, con_id, index, flags, ...) \ + __gpiod_get_index(dev, con_id, index, flags) +#define gpiod_get_index(varargs...) __gpiod_get_index(varargs, 0) +struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev, + const char *con_id, + enum gpiod_flags flags); +#define __gpiod_get_optional(dev, con_id, flags, ...) \ + __gpiod_get_optional(dev, con_id, flags) +#define gpiod_get_optional(varargs...) __gpiod_get_optional(varargs, 0) +struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev, const char *con_id, - unsigned int index); + unsigned int index, + enum gpiod_flags flags); +#define __gpiod_get_index_optional(dev, con_id, index, flags, ...) \ + __gpiod_get_index_optional(dev, con_id, index, flags) +#define gpiod_get_index_optional(varargs...) \ + __gpiod_get_index_optional(varargs, 0) void gpiod_put(struct gpio_desc *desc); -struct gpio_desc *__must_check devm_gpiod_get(struct device *dev, - const char *con_id); -struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev, +struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev, + const char *con_id, + enum gpiod_flags flags); +#define __devm_gpiod_get(dev, con_id, flags, ...) \ + __devm_gpiod_get(dev, con_id, flags) +#define devm_gpiod_get(varargs...) __devm_gpiod_get(varargs, 0) +struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev, const char *con_id, - unsigned int idx); -struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev, - const char *con_id); + unsigned int idx, + enum gpiod_flags flags); +#define __devm_gpiod_get_index(dev, con_id, index, flags, ...) \ + __devm_gpiod_get_index(dev, con_id, index, flags) +#define devm_gpiod_get_index(varargs...) __devm_gpiod_get_index(varargs, 0) +struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev, + const char *con_id, + enum gpiod_flags flags); +#define __devm_gpiod_get_optional(dev, con_id, flags, ...) \ + __devm_gpiod_get_optional(dev, con_id, flags) +#define devm_gpiod_get_optional(varargs...) \ + __devm_gpiod_get_optional(varargs, 0) struct gpio_desc *__must_check -devm_gpiod_get_index_optional(struct device *dev, const char *con_id, - unsigned int index); +__devm_gpiod_get_index_optional(struct device *dev, const char *con_id, + unsigned int index, enum gpiod_flags flags); +#define __devm_gpiod_get_index_optional(dev, con_id, index, flags, ...) \ + __devm_gpiod_get_index_optional(dev, con_id, index, flags) +#define devm_gpiod_get_index_optional(varargs...) \ + __devm_gpiod_get_index_optional(varargs, 0) void devm_gpiod_put(struct device *dev, struct gpio_desc *desc); |