1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* MCP23S08 SPI/I2C GPIO driver */
3 
4 #include <linux/gpio/driver.h>
5 #include <linux/irq.h>
6 #include <linux/mutex.h>
7 #include <linux/pinctrl/pinctrl.h>
8 #include <linux/types.h>
9 
10 /*
11  * MCP types supported by driver
12  */
13 #define MCP_TYPE_S08	1
14 #define MCP_TYPE_S17	2
15 #define MCP_TYPE_008	3
16 #define MCP_TYPE_017	4
17 #define MCP_TYPE_S18	5
18 #define MCP_TYPE_018	6
19 
20 struct device;
21 struct regmap;
22 
23 struct pinctrl_dev;
24 
25 struct mcp23s08 {
26 	u8			addr;
27 	bool			irq_active_high;
28 	bool			reg_shift;
29 
30 	u16			irq_rise;
31 	u16			irq_fall;
32 	int			irq;
33 	bool			irq_controller;
34 	int			cached_gpio;
35 	/* lock protects regmap access with bypass/cache flags */
36 	struct mutex		lock;
37 
38 	struct gpio_chip	chip;
39 	struct irq_chip		irq_chip;
40 
41 	struct regmap		*regmap;
42 	struct device		*dev;
43 
44 	struct pinctrl_dev	*pctldev;
45 	struct pinctrl_desc	pinctrl_desc;
46 	struct gpio_desc        *reset_gpio;
47 };
48 
49 extern const struct regmap_config mcp23x08_regmap;
50 extern const struct regmap_config mcp23x17_regmap;
51 
52 int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
53 		       unsigned int addr, unsigned int type, unsigned int base);
54