369 struct gpio_chip {  struct
375 	int			(*request)(struct gpio_chip *gc,  argument
377 	void			(*free)(struct gpio_chip *gc,  argument
379 	int			(*get_direction)(struct gpio_chip *gc,  argument
381 	int			(*direction_input)(struct gpio_chip *gc,  argument
383 	int			(*direction_output)(struct gpio_chip *gc,  argument
385 	int			(*get)(struct gpio_chip *gc,  argument
387 	int			(*get_multiple)(struct gpio_chip *gc,  argument
390 	void			(*set)(struct gpio_chip *gc,  argument
392 	void			(*set_multiple)(struct gpio_chip *gc,  argument
395 	int			(*set_config)(struct gpio_chip *gc,  argument
398 	int			(*to_irq)(struct gpio_chip *gc,  argument
402 						struct gpio_chip *gc);  argument
404 	int			(*init_valid_mask)(struct gpio_chip *gc,  argument
408 	int			(*add_pin_ranges)(struct gpio_chip *gc);  argument
410 	int			base;
411 	u16			ngpio;
412 	const char		*const *names;
413 	bool			can_sleep;
416 	unsigned long (*read_reg)(void __iomem *reg);
417 	void (*write_reg)(void __iomem *reg, unsigned long data);
418 	bool be_bits;
419 	void __iomem *reg_dat;
420 	void __iomem *reg_set;
421 	void __iomem *reg_clr;
422 	void __iomem *reg_dir_out;
423 	void __iomem *reg_dir_in;
424 	bool bgpio_dir_unreadable;
425 	int bgpio_bits;
426 	spinlock_t bgpio_lock;
427 	unsigned long bgpio_data;
428 	unsigned long bgpio_dir;
443 	struct gpio_irq_chip irq;
452 	unsigned long *valid_mask;
480 	int (*of_xlate)(struct gpio_chip *gc,  argument