424 struct gpio_chip {  struct
431 	int			(*request)(struct gpio_chip *gc,  argument
433 	void			(*free)(struct gpio_chip *gc,  argument
435 	int			(*get_direction)(struct gpio_chip *gc,  argument
437 	int			(*direction_input)(struct gpio_chip *gc,  argument
439 	int			(*direction_output)(struct gpio_chip *gc,  argument
441 	int			(*get)(struct gpio_chip *gc,  argument
443 	int			(*get_multiple)(struct gpio_chip *gc,  argument
446 	int			(*set)(struct gpio_chip *gc,  argument
448 	int			(*set_multiple)(struct gpio_chip *gc,  argument
451 	int			(*set_config)(struct gpio_chip *gc,  argument
454 	int			(*to_irq)(struct gpio_chip *gc,  argument
458 						struct gpio_chip *gc);  argument
460 	int			(*init_valid_mask)(struct gpio_chip *gc,  argument
464 	int			(*add_pin_ranges)(struct gpio_chip *gc);  argument
466 	int			(*en_hw_timestamp)(struct gpio_chip *gc,  argument
469 	int			(*dis_hw_timestamp)(struct gpio_chip *gc,  argument
472 	int			base;
473 	u16			ngpio;
474 	u16			offset;
475 	const char		*const *names;
476 	bool			can_sleep;
479 	unsigned long (*read_reg)(void __iomem *reg);
480 	void (*write_reg)(void __iomem *reg, unsigned long data);
481 	bool be_bits;
482 	void __iomem *reg_dat;
483 	void __iomem *reg_set;
484 	void __iomem *reg_clr;
485 	void __iomem *reg_dir_out;
486 	void __iomem *reg_dir_in;
487 	bool bgpio_dir_unreadable;
488 	bool bgpio_pinctrl;
489 	int bgpio_bits;
490 	raw_spinlock_t bgpio_lock;
491 	unsigned long bgpio_data;
492 	unsigned long bgpio_dir;
507 	struct gpio_irq_chip irq;
539 	 * any driver using more than one gpio_chip per device tree node.  argument
543 	bool (*of_node_instance_match)(struct gpio_chip *gc, unsigned int i);  argument
551 	int (*of_xlate)(struct gpio_chip *gc,  argument