diff options
Diffstat (limited to 'include/asm-generic/gpio.h')
| -rw-r--r-- | include/asm-generic/gpio.h | 86 |
1 files changed, 42 insertions, 44 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 20ca7663975..bde646995d1 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -47,12 +47,14 @@ struct gpio; struct seq_file; struct module; struct device_node; +struct gpio_desc; /** * struct gpio_chip - abstract a GPIO controller * @label: for diagnostics * @dev: optional device providing the GPIOs * @owner: helps prevent removal of modules exporting active GPIOs + * @list: links gpio_chips together for traversal * @request: optional hook for chip-specific activation, such as * enabling module power and clock; may sleep * @free: optional hook for chip-specific deactivation, such as @@ -75,6 +77,7 @@ struct device_node; * negative during registration, requests dynamic ID allocation. * @ngpio: the number of GPIOs handled by this controller; the last GPIO * handled is (base + ngpio - 1). + * @desc: array of ngpio descriptors. Private. * @can_sleep: flag must be set iff get()/set() methods sleep, as they * must while accessing GPIO expander chips over I2C or SPI * @names: if set, must be an array of strings to use as alternative @@ -98,6 +101,7 @@ struct gpio_chip { const char *label; struct device *dev; struct module *owner; + struct list_head list; int (*request)(struct gpio_chip *chip, unsigned offset); @@ -124,6 +128,7 @@ struct gpio_chip { struct gpio_chip *chip); int base; u16 ngpio; + struct gpio_desc *desc; const char *const *names; unsigned can_sleep:1; unsigned exported:1; @@ -152,7 +157,6 @@ struct gpio_chip { extern const char *gpiochip_is_requested(struct gpio_chip *chip, unsigned offset); extern struct gpio_chip *gpio_to_chip(unsigned gpio); -extern int __must_check gpiochip_reserve(int start, int ngpio); /* add/remove chips */ extern int gpiochip_add(struct gpio_chip *chip); @@ -192,12 +196,6 @@ extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *labe extern int gpio_request_array(const struct gpio *array, size_t num); extern void gpio_free_array(const struct gpio *array, size_t num); -/* bindings for managed devices that want to request gpios */ -int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); -int devm_gpio_request_one(struct device *dev, unsigned gpio, - unsigned long flags, const char *label); -void devm_gpio_free(struct device *dev, unsigned int gpio); - #ifdef CONFIG_GPIO_SYSFS /* @@ -212,6 +210,43 @@ extern 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 */ + #else /* !CONFIG_GPIOLIB */ static inline bool gpio_is_valid(int number) @@ -270,41 +305,4 @@ 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 */ |