diff options
Diffstat (limited to 'include/linux/gpio/consumer.h')
| -rw-r--r-- | include/linux/gpio/consumer.h | 106 |
1 files changed, 98 insertions, 8 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index bed128e8f4b1..b7ce0c64c6f3 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -1,6 +1,7 @@ #ifndef __LINUX_GPIO_CONSUMER_H #define __LINUX_GPIO_CONSUMER_H +#include <linux/bug.h> #include <linux/err.h> #include <linux/kernel.h> @@ -17,19 +18,80 @@ 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); + 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, + 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); + 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, 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); int gpiod_get_direction(const struct gpio_desc *desc); @@ -73,6 +135,20 @@ static inline struct gpio_desc *__must_check gpiod_get_index(struct device *dev, { return ERR_PTR(-ENOSYS); } + +static inline struct gpio_desc *__must_check +gpiod_get_optional(struct device *dev, const char *con_id) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct gpio_desc *__must_check +gpiod_get_index_optional(struct device *dev, const char *con_id, + unsigned int index) +{ + return ERR_PTR(-ENOSYS); +} + static inline void gpiod_put(struct gpio_desc *desc) { might_sleep(); @@ -93,6 +169,20 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev, { return ERR_PTR(-ENOSYS); } + +static inline struct gpio_desc *__must_check +devm_gpiod_get_optional(struct device *dev, const char *con_id) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct gpio_desc *__must_check +devm_gpiod_get_index_optional(struct device *dev, const char *con_id, + unsigned int index) +{ + return ERR_PTR(-ENOSYS); +} + static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc) { might_sleep(); |