421 struct gpio_chip {  struct
428 	int			(*request)(struct gpio_chip *gc,  argument
430 	void			(*free)(struct gpio_chip *gc,  argument
432 	int			(*get_direction)(struct gpio_chip *gc,  argument
434 	int			(*direction_input)(struct gpio_chip *gc,  argument
436 	int			(*direction_output)(struct gpio_chip *gc,  argument
438 	int			(*get)(struct gpio_chip *gc,  argument
440 	int			(*get_multiple)(struct gpio_chip *gc,  argument
443 	void			(*set)(struct gpio_chip *gc,  argument
445 	void			(*set_multiple)(struct gpio_chip *gc,  argument
448 	int			(*set_config)(struct gpio_chip *gc,  argument
451 	int			(*to_irq)(struct gpio_chip *gc,  argument
455 						struct gpio_chip *gc);  argument
457 	int			(*init_valid_mask)(struct gpio_chip *gc,  argument
461 	int			(*add_pin_ranges)(struct gpio_chip *gc);  argument
463 	int			(*en_hw_timestamp)(struct gpio_chip *gc,  argument
466 	int			(*dis_hw_timestamp)(struct gpio_chip *gc,  argument
469 	int			base;
470 	u16			ngpio;
471 	u16			offset;
472 	const char		*const *names;
473 	bool			can_sleep;
476 	unsigned long (*read_reg)(void __iomem *reg);
477 	void (*write_reg)(void __iomem *reg, unsigned long data);
478 	bool be_bits;
479 	void __iomem *reg_dat;
480 	void __iomem *reg_set;
481 	void __iomem *reg_clr;
482 	void __iomem *reg_dir_out;
483 	void __iomem *reg_dir_in;
484 	bool bgpio_dir_unreadable;
485 	int bgpio_bits;
486 	raw_spinlock_t bgpio_lock;
487 	unsigned long bgpio_data;
488 	unsigned long bgpio_dir;
503 	struct gpio_irq_chip irq;
533 	int (*of_xlate)(struct gpio_chip *gc,  argument