/* SPDX-License-Identifier: GPL-2.0-only */
  /* MCP23S08 SPI/I2C GPIO driver */
  
  #include <linux/gpio/driver.h>
  #include <linux/irq.h>
  #include <linux/mutex.h>
  #include <linux/pinctrl/pinctrl.h>
  #include <linux/types.h>
  
  /*
   * MCP types supported by driver
   */
  #define MCP_TYPE_S08	1
  #define MCP_TYPE_S17	2
  #define MCP_TYPE_008	3
  #define MCP_TYPE_017	4
  #define MCP_TYPE_S18	5
  #define MCP_TYPE_018	6
  
  struct device;
  struct regmap;
  
  struct pinctrl_dev;
  
  struct mcp23s08 {
  	u8			addr;
  	bool			irq_active_high;
  	bool			reg_shift;
  
  	u16			irq_rise;
  	u16			irq_fall;
  	int			irq;
  	bool			irq_controller;
  	int			cached_gpio;
  	/* lock protects regmap access with bypass/cache flags */
  	struct mutex		lock;
  
  	struct gpio_chip	chip;
  	struct irq_chip		irq_chip;
  
  	struct regmap		*regmap;
  	struct device		*dev;
  
  	struct pinctrl_dev	*pctldev;
  	struct pinctrl_desc	pinctrl_desc;
  };
  
  extern const struct regmap_config mcp23x08_regmap;
  extern const struct regmap_config mcp23x17_regmap;
  
  int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
  		       unsigned int addr, unsigned int type, unsigned int base);