/* * Basic memory-mapped GPIO controllers. * * Copyright 2008 MontaVista Software, Inc. * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.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 __BASIC_MMIO_GPIO_H#define __BASIC_MMIO_GPIO_H #include <linux/gpio.h>#include <linux/types.h>#include <linux/compiler.h>#include <linux/spinlock_types.h> struct bgpio_pdata {	const char *label;	int base;	int ngpio;}; struct device; struct bgpio_chip {	struct gpio_chip gc; 	unsigned long (*read_reg)(void __iomem *reg);	void (*write_reg)(void __iomem *reg, unsigned long data); 	void __iomem *reg_dat;	void __iomem *reg_set;	void __iomem *reg_clr;	void __iomem *reg_dir; 	/* Number of bits (GPIOs): <register width> * 8. */	int bits; 	/*	 * Some GPIO controllers work with the big-endian bits notation,	 * e.g. in a 8-bits register, GPIO7 is the least significant bit.	 */	unsigned long (*pin2mask)(struct bgpio_chip *bgc, unsigned int pin); 	/*	 * Used to lock bgpio_chip->data. Also, this is needed to keep	 * shadowed and real data registers writes together.	 */	spinlock_t lock; 	/* Shadowed data register to clear/set bits safely. */	unsigned long data; 	/* Shadowed direction registers to clear/set direction safely. */	unsigned long dir;}; static inline struct bgpio_chip *to_bgpio_chip(struct gpio_chip *gc){	return container_of(gc, struct bgpio_chip, gc);} int bgpio_remove(struct bgpio_chip *bgc);int bgpio_init(struct bgpio_chip *bgc, struct device *dev,	       unsigned long sz, void __iomem *dat, void __iomem *set,	       void __iomem *clr, void __iomem *dirout, void __iomem *dirin,	       unsigned long flags); #define BGPIOF_BIG_ENDIAN		BIT(0)#define BGPIOF_UNREADABLE_REG_SET	BIT(1) /* reg_set is unreadable */#define BGPIOF_UNREADABLE_REG_DIR	BIT(2) /* reg_dir is unreadable */#define BGPIOF_BIG_ENDIAN_BYTE_ORDER	BIT(3) #endif /* __BASIC_MMIO_GPIO_H */