4 #include <linux/errno.h>
6 /* see Documentation/gpio.txt */
8 /* make these flag values available regardless of GPIO kconfig options */
9 #define GPIOF_DIR_OUT (0 << 0)
10 #define GPIOF_DIR_IN (1 << 0)
12 #define GPIOF_INIT_LOW (0 << 1)
13 #define GPIOF_INIT_HIGH (1 << 1)
15 #define GPIOF_IN (GPIOF_DIR_IN)
16 #define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW)
17 #define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH)
19 /* Gpio pin is active-low */
20 #define GPIOF_ACTIVE_LOW (1 << 2)
22 /* Gpio pin is open drain */
23 #define GPIOF_OPEN_DRAIN (1 << 3)
25 /* Gpio pin is open source */
26 #define GPIOF_OPEN_SOURCE (1 << 4)
28 #define GPIOF_EXPORT (1 << 5)
29 #define GPIOF_EXPORT_CHANGEABLE (1 << 6)
30 #define GPIOF_EXPORT_DIR_FIXED (GPIOF_EXPORT)
31 #define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
34 * struct gpio - a structure describing a GPIO with configuration
35 * @gpio: the GPIO number
36 * @flags: GPIO configuration as specified by GPIOF_*
37 * @label: a literal description string of this GPIO
47 #ifdef CONFIG_ARCH_HAVE_CUSTOM_GPIO_H
51 #include <asm-generic/gpio.h>
53 static inline int gpio_get_value(unsigned int gpio)
55 return __gpio_get_value(gpio);
58 static inline void gpio_set_value(unsigned int gpio, int value)
60 __gpio_set_value(gpio, value);
63 static inline int gpio_cansleep(unsigned int gpio)
65 return __gpio_cansleep(gpio);
68 static inline int gpio_to_irq(unsigned int gpio)
70 return __gpio_to_irq(gpio);
73 static inline int irq_to_gpio(unsigned int irq)
78 #endif /* ! CONFIG_ARCH_HAVE_CUSTOM_GPIO_H */
80 #else /* ! CONFIG_GPIOLIB */
82 #include <linux/kernel.h>
83 #include <linux/types.h>
84 #include <linux/errno.h>
85 #include <linux/bug.h>
86 #include <linux/pinctrl/pinctrl.h>
91 static inline bool gpio_is_valid(int number)
96 static inline int gpio_request(unsigned gpio, const char *label)
101 static inline int gpio_request_one(unsigned gpio,
102 unsigned long flags, const char *label)
107 static inline int gpio_request_array(const struct gpio *array, size_t num)
112 static inline void gpio_free(unsigned gpio)
116 /* GPIO can never have been requested */
120 static inline void gpio_free_array(const struct gpio *array, size_t num)
124 /* GPIO can never have been requested */
128 static inline int gpio_direction_input(unsigned gpio)
133 static inline int gpio_direction_output(unsigned gpio, int value)
138 static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
143 static inline int gpio_get_value(unsigned gpio)
145 /* GPIO can never have been requested or set as {in,out}put */
150 static inline void gpio_set_value(unsigned gpio, int value)
152 /* GPIO can never have been requested or set as output */
156 static inline int gpio_cansleep(unsigned gpio)
158 /* GPIO can never have been requested or set as {in,out}put */
163 static inline int gpio_get_value_cansleep(unsigned gpio)
165 /* GPIO can never have been requested or set as {in,out}put */
170 static inline void gpio_set_value_cansleep(unsigned gpio, int value)
172 /* GPIO can never have been requested or set as output */
176 static inline int gpio_export(unsigned gpio, bool direction_may_change)
178 /* GPIO can never have been requested or set as {in,out}put */
183 static inline int gpio_export_link(struct device *dev, const char *name,
186 /* GPIO can never have been exported */
191 static inline int gpio_sysfs_set_active_low(unsigned gpio, int value)
193 /* GPIO can never have been requested */
198 static inline void gpio_unexport(unsigned gpio)
200 /* GPIO can never have been exported */
204 static inline int gpio_to_irq(unsigned gpio)
206 /* GPIO can never have been requested or set as input */
211 static inline int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
217 static inline void gpio_unlock_as_irq(struct gpio_chip *chip,
223 static inline int irq_to_gpio(unsigned irq)
225 /* irq can never have been returned from gpio_to_irq() */
231 gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name,
232 unsigned int gpio_offset, unsigned int pin_offset,
240 gpiochip_add_pingroup_range(struct gpio_chip *chip,
241 struct pinctrl_dev *pctldev,
242 unsigned int gpio_offset, const char *pin_group)
249 gpiochip_remove_pin_ranges(struct gpio_chip *chip)
254 #endif /* ! CONFIG_GPIOLIB */
258 /* bindings for managed devices that want to request gpios */
259 int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
260 int devm_gpio_request_one(struct device *dev, unsigned gpio,
261 unsigned long flags, const char *label);
262 void devm_gpio_free(struct device *dev, unsigned int gpio);
264 #endif /* __LINUX_GPIO_H */