diff options
Diffstat (limited to 'include/asm-generic/gpio.h')
-rw-r--r-- | include/asm-generic/gpio.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index eb70ca2..20ca766 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -5,6 +5,7 @@ #include <linux/types.h> #include <linux/errno.h> #include <linux/of.h> +#include <linux/pinctrl/pinctrl.h> #ifdef CONFIG_GPIOLIB @@ -137,6 +138,15 @@ struct gpio_chip { int (*of_xlate)(struct gpio_chip *gc, const struct of_phandle_args *gpiospec, u32 *flags); #endif +#ifdef CONFIG_PINCTRL + /* + * If CONFIG_PINCTRL is enabled, then gpio controllers can optionally + * describe the actual pin range which they serve in an SoC. This + * information would be used by pinctrl subsystem to configure + * corresponding pins for gpio usage. + */ + struct list_head pin_ranges; +#endif }; extern const char *gpiochip_is_requested(struct gpio_chip *chip, @@ -260,4 +270,41 @@ static inline void gpio_unexport(unsigned gpio) } #endif /* CONFIG_GPIO_SYSFS */ +#ifdef CONFIG_PINCTRL + +/** + * struct gpio_pin_range - pin range controlled by a gpio chip + * @head: list for maintaining set of pin ranges, used internally + * @pctldev: pinctrl device which handles corresponding pins + * @range: actual range of pins controlled by a gpio controller + */ + +struct gpio_pin_range { + struct list_head node; + struct pinctrl_dev *pctldev; + struct pinctrl_gpio_range range; +}; + +int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, + unsigned int gpio_offset, unsigned int pin_offset, + unsigned int npins); +void gpiochip_remove_pin_ranges(struct gpio_chip *chip); + +#else + +static inline int +gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, + unsigned int gpio_offset, unsigned int pin_offset, + unsigned int npins) +{ + return 0; +} + +static inline void +gpiochip_remove_pin_ranges(struct gpio_chip *chip) +{ +} + +#endif /* CONFIG_PINCTRL */ + #endif /* _ASM_GENERIC_GPIO_H */ |