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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | #ifndef __LINUX_GPIO_H #define __LINUX_GPIO_H /* see Documentation/gpio.txt */ /* make these flag values available regardless of GPIO kconfig options */ #define GPIOF_DIR_OUT (0 << 0) #define GPIOF_DIR_IN (1 << 0) #define GPIOF_INIT_LOW (0 << 1) #define GPIOF_INIT_HIGH (1 << 1) #define GPIOF_IN (GPIOF_DIR_IN) #define GPIOF_OUT_INIT_LOW (GPIOF_DIR_OUT | GPIOF_INIT_LOW) #define GPIOF_OUT_INIT_HIGH (GPIOF_DIR_OUT | GPIOF_INIT_HIGH) /** * struct gpio - a structure describing a GPIO with configuration * @gpio: the GPIO number * @flags: GPIO configuration as specified by GPIOF_* * @label: a literal description string of this GPIO */ struct gpio { unsigned gpio; unsigned long flags; const char *label; }; #ifdef CONFIG_GENERIC_GPIO #include <asm/gpio.h> #else #include <linux/kernel.h> #include <linux/types.h> #include <linux/errno.h> struct device; struct gpio_chip; static inline bool gpio_is_valid(int number) { return false; } static inline int gpio_request(unsigned gpio, const char *label) { return -ENOSYS; } static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) { return -ENOSYS; } static inline int gpio_request_array(const struct gpio *array, size_t num) { return -ENOSYS; } static inline void gpio_free(unsigned gpio) { might_sleep(); /* GPIO can never have been requested */ WARN_ON(1); } static inline void gpio_free_array(const struct gpio *array, size_t num) { might_sleep(); /* GPIO can never have been requested */ WARN_ON(1); } static inline int gpio_direction_input(unsigned gpio) { return -ENOSYS; } static inline int gpio_direction_output(unsigned gpio, int value) { return -ENOSYS; } static inline int gpio_set_debounce(unsigned gpio, unsigned debounce) { return -ENOSYS; } static inline int gpio_get_value(unsigned gpio) { /* GPIO can never have been requested or set as {in,out}put */ WARN_ON(1); return 0; } static inline void gpio_set_value(unsigned gpio, int value) { /* GPIO can never have been requested or set as output */ WARN_ON(1); } static inline int gpio_cansleep(unsigned gpio) { /* GPIO can never have been requested or set as {in,out}put */ WARN_ON(1); return 0; } static inline int gpio_get_value_cansleep(unsigned gpio) { /* GPIO can never have been requested or set as {in,out}put */ WARN_ON(1); return 0; } static inline void gpio_set_value_cansleep(unsigned gpio, int value) { /* GPIO can never have been requested or set as output */ WARN_ON(1); } static inline int gpio_export(unsigned gpio, bool direction_may_change) { /* GPIO can never have been requested or set as {in,out}put */ WARN_ON(1); return -EINVAL; } static inline int gpio_export_link(struct device *dev, const char *name, unsigned gpio) { /* GPIO can never have been exported */ WARN_ON(1); return -EINVAL; } static inline int gpio_sysfs_set_active_low(unsigned gpio, int value) { /* GPIO can never have been requested */ WARN_ON(1); return -EINVAL; } static inline void gpio_unexport(unsigned gpio) { /* GPIO can never have been exported */ WARN_ON(1); } static inline int gpio_to_irq(unsigned gpio) { /* GPIO can never have been requested or set as input */ WARN_ON(1); return -EINVAL; } static inline int irq_to_gpio(unsigned irq) { /* irq can never have been returned from gpio_to_irq() */ WARN_ON(1); return -EINVAL; } #endif #endif /* __LINUX_GPIO_H */ |