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_info { 26 const struct regmap_config *regmap; 27 const char *label; 28 unsigned int type; 29 u16 ngpio; 30 bool reg_shift; 31 }; 32 33 struct mcp23s08 { 34 u8 addr; 35 bool irq_active_high; 36 bool reg_shift; 37 38 u16 irq_rise; 39 u16 irq_fall; 40 int irq; 41 bool irq_controller; 42 int cached_gpio; 43 /* lock protects regmap access with bypass/cache flags */ 44 struct mutex lock; 45 46 struct gpio_chip chip; 47 48 struct regmap *regmap; 49 struct device *dev; 50 51 struct pinctrl_dev *pctldev; 52 struct pinctrl_desc pinctrl_desc; 53 struct gpio_desc *reset_gpio; 54 }; 55 56 extern const struct regmap_config mcp23x08_regmap; 57 extern const struct regmap_config mcp23x17_regmap; 58 59 int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev, 60 unsigned int addr, unsigned int type, unsigned int base); 61