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- /*
- * 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/errno.h>
- #include <linux/gpio.h>
-
- #ifdef CONFIG_OF_GPIO
-
- /*
- * Generic OF GPIO chip
- */
- struct of_gpio_chip {
- struct gpio_chip gc;
- int gpio_cells;
- int (*xlate)(struct of_gpio_chip *of_gc, struct device_node *np,
- const void *gpio_spec);
- };
-
- static inline struct of_gpio_chip *to_of_gpio_chip(struct gpio_chip *gc)
- {
- return container_of(gc, struct of_gpio_chip, gc);
- }
-
- /*
- * OF GPIO chip for memory mapped banks
- */
- struct of_mm_gpio_chip {
- struct of_gpio_chip of_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)
- {
- struct of_gpio_chip *of_gc = to_of_gpio_chip(gc);
-
- return container_of(of_gc, struct of_mm_gpio_chip, of_gc);
- }
-
- extern int of_get_gpio(struct device_node *np, int index);
- extern int of_mm_gpiochip_add(struct device_node *np,
- struct of_mm_gpio_chip *mm_gc);
- extern int of_gpio_simple_xlate(struct of_gpio_chip *of_gc,
- struct device_node *np,
- const void *gpio_spec);
- #else
-
- /* Drivers may not strictly depend on the GPIO support, so let them link. */
- static inline int of_get_gpio(struct device_node *np, int index)
- {
- return -ENOSYS;
- }
-
- #endif /* CONFIG_OF_GPIO */
-
- #endif /* __LINUX_OF_GPIO_H */
-