diff options
Diffstat (limited to 'include/linux/of_gpio.h')
| -rw-r--r-- | include/linux/of_gpio.h | 143 |
1 files changed, 9 insertions, 134 deletions
diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h index a83dc6f5008e..d0f66a5e1b2a 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/of_gpio.h @@ -1,163 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * OF helpers for the GPIO API * * Copyright (c) 2007-2008 MontaVista Software, Inc. * * Author: Anton Vorontsov <avorontsov@ru.mvista.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #ifndef __LINUX_OF_GPIO_H #define __LINUX_OF_GPIO_H #include <linux/compiler.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> +#include <linux/gpio.h> /* FIXME: Shouldn't be here */ #include <linux/of.h> 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, -}; - #ifdef CONFIG_OF_GPIO -/* - * 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(struct device_node *np, - struct of_mm_gpio_chip *mm_gc); - -extern void of_gpiochip_add(struct gpio_chip *gc); -extern void of_gpiochip_remove(struct gpio_chip *gc); -extern int of_gpio_simple_xlate(struct gpio_chip *gc, - const struct of_phandle_args *gpiospec, - u32 *flags); +extern int of_get_named_gpio(const struct device_node *np, + const char *list_name, int index); #else /* CONFIG_OF_GPIO */ -/* 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) -{ - return -ENOSYS; -} +#include <linux/errno.h> -static inline int of_gpio_simple_xlate(struct gpio_chip *gc, - const struct of_phandle_args *gpiospec, - u32 *flags) +/* Drivers may not strictly depend on the GPIO support, so let them link. */ +static inline int of_get_named_gpio(const struct device_node *np, + const char *propname, int index) { return -ENOSYS; } -static inline void of_gpiochip_add(struct gpio_chip *gc) { } -static inline void of_gpiochip_remove(struct gpio_chip *gc) { } - #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"); -} - -/** - * of_get_gpio_flags() - Get a GPIO number and flags to use with GPIO API - * @np: device node to get GPIO from - * @index: index of the GPIO - * @flags: a flags pointer to fill in - * - * Returns GPIO number to use with Linux generic GPIO API, or one of the errno - * value on the error condition. If @flags is not NULL the function also fills - * in flags for the GPIO. - */ -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 */ |