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/* 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>
*/
#ifndef __LINUX_OF_GPIO_H
#define __LINUX_OF_GPIO_H
#include <linux/compiler.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,
OF_GPIO_SINGLE_ENDED = 0x2,
OF_GPIO_OPEN_DRAIN = 0x4,
OF_GPIO_TRANSITORY = 0x8,
OF_GPIO_PULL_UP = 0x10,
OF_GPIO_PULL_DOWN = 0x20,
OF_GPIO_PULL_DISABLE = 0x40,
};
#ifdef CONFIG_OF_GPIO
#include <linux/container_of.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(const struct device_node *np,
const char *list_name, int index);
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);
#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(const struct device_node *np,
const char *propname, int index)
{
return -ENOSYS;
}
#endif /* CONFIG_OF_GPIO */
#endif /* __LINUX_OF_GPIO_H */
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