diff options
Diffstat (limited to 'include/linux/of_gpio.h')
| -rw-r--r-- | include/linux/of_gpio.h | 121 |
1 files changed, 4 insertions, 117 deletions
diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h index f821095218b0..d0f66a5e1b2a 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/of_gpio.h @@ -17,135 +17,22 @@ struct device_node; -/* - * This is Linux-specific flags. By default controllers' and Linux' mapping - * match, but GPIO controllers are free to translate their own flags to - * Linux-specific in their .xlate callback. Though, 1:1 mapping is recommended. - */ -enum of_gpio_flags { - OF_GPIO_ACTIVE_LOW = 0x1, - OF_GPIO_SINGLE_ENDED = 0x2, - OF_GPIO_OPEN_DRAIN = 0x4, - OF_GPIO_TRANSITORY = 0x8, - OF_GPIO_PULL_UP = 0x10, - OF_GPIO_PULL_DOWN = 0x20, -}; - #ifdef CONFIG_OF_GPIO -#include <linux/kernel.h> - -/* - * OF GPIO chip for memory mapped banks - */ -struct of_mm_gpio_chip { - struct gpio_chip gc; - void (*save_regs)(struct of_mm_gpio_chip *mm_gc); - void __iomem *regs; -}; - -static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc) -{ - return container_of(gc, struct of_mm_gpio_chip, gc); -} - -extern int of_get_named_gpio_flags(struct device_node *np, - const char *list_name, int index, enum of_gpio_flags *flags); - -extern int of_mm_gpiochip_add_data(struct device_node *np, - struct of_mm_gpio_chip *mm_gc, - void *data); -static inline int of_mm_gpiochip_add(struct device_node *np, - struct of_mm_gpio_chip *mm_gc) -{ - return of_mm_gpiochip_add_data(np, mm_gc, NULL); -} -extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc); +extern int of_get_named_gpio(const struct device_node *np, + const char *list_name, int index); #else /* CONFIG_OF_GPIO */ #include <linux/errno.h> /* Drivers may not strictly depend on the GPIO support, so let them link. */ -static inline int of_get_named_gpio_flags(struct device_node *np, - const char *list_name, int index, enum of_gpio_flags *flags) +static inline int of_get_named_gpio(const struct device_node *np, + const char *propname, int index) { - if (flags) - *flags = 0; - return -ENOSYS; } #endif /* CONFIG_OF_GPIO */ -/** - * of_gpio_named_count() - Count GPIOs for a device - * @np: device node to count GPIOs for - * @propname: property name containing gpio specifier(s) - * - * The function returns the count of GPIOs specified for a node. - * Note that the empty GPIO specifiers count too. Returns either - * Number of gpios defined in property, - * -EINVAL for an incorrectly formed gpios property, or - * -ENOENT for a missing gpios property - * - * Example: - * gpios = <0 - * &gpio1 1 2 - * 0 - * &gpio2 3 4>; - * - * The above example defines four GPIOs, two of which are not specified. - * This function will return '4' - */ -static inline int of_gpio_named_count(struct device_node *np, const char* propname) -{ - return of_count_phandle_with_args(np, propname, "#gpio-cells"); -} - -/** - * of_gpio_count() - Count GPIOs for a device - * @np: device node to count GPIOs for - * - * Same as of_gpio_named_count, but hard coded to use the 'gpios' property - */ -static inline int of_gpio_count(struct device_node *np) -{ - return of_gpio_named_count(np, "gpios"); -} - -static inline int of_get_gpio_flags(struct device_node *np, int index, - enum of_gpio_flags *flags) -{ - return of_get_named_gpio_flags(np, "gpios", index, flags); -} - -/** - * of_get_named_gpio() - Get a GPIO number to use with GPIO API - * @np: device node to get GPIO from - * @propname: Name of property containing gpio specifier(s) - * @index: index of the GPIO - * - * Returns GPIO number to use with Linux generic GPIO API, or one of the errno - * value on the error condition. - */ -static inline int of_get_named_gpio(struct device_node *np, - const char *propname, int index) -{ - return of_get_named_gpio_flags(np, propname, index, NULL); -} - -/** - * of_get_gpio() - Get a GPIO number to use with GPIO API - * @np: device node to get GPIO from - * @index: index of the GPIO - * - * Returns GPIO number to use with Linux generic GPIO API, or one of the errno - * value on the error condition. - */ -static inline int of_get_gpio(struct device_node *np, int index) -{ - return of_get_gpio_flags(np, index, NULL); -} - #endif /* __LINUX_OF_GPIO_H */ |