diff options
Diffstat (limited to 'include/linux/gpio/driver.h')
| -rw-r--r-- | include/linux/gpio/driver.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index a3e181e09636..9fe283642253 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -10,6 +10,8 @@ struct of_phandle_args; struct device_node; struct seq_file; +#ifdef CONFIG_GPIOLIB + /** * struct gpio_chip - abstract a GPIO controller * @label: for diagnostics @@ -129,6 +131,11 @@ extern struct gpio_chip *gpiochip_find(void *data, int gpiod_lock_as_irq(struct gpio_desc *desc); void gpiod_unlock_as_irq(struct gpio_desc *desc); +struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc); + +struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, + u16 hwnum); + enum gpio_lookup_flags { GPIO_ACTIVE_HIGH = (0 << 0), GPIO_ACTIVE_LOW = (1 << 0), @@ -183,4 +190,15 @@ struct gpiod_lookup_table { void gpiod_add_lookup_table(struct gpiod_lookup_table *table); +#else /* CONFIG_GPIOLIB */ + +static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc) +{ + /* GPIO can never have been requested */ + WARN_ON(1); + return ERR_PTR(-ENODEV); +} + +#endif /* CONFIG_GPIOLIB */ + #endif |
