1#ifndef LINUX_SPI_MAX7301_H
2#define LINUX_SPI_MAX7301_H
3
4#include <linux/gpio.h>
5
6/*
7 * Some registers must be read back to modify.
8 * To save time we cache them here in memory
9 */
10struct max7301 {
11	struct mutex	lock;
12	u8		port_config[8];	/* field 0 is unused */
13	u32		out_level;	/* cached output levels */
14	u32		input_pullup_active;
15	struct gpio_chip chip;
16	struct device *dev;
17	int (*write)(struct device *dev, unsigned int reg, unsigned int val);
18	int (*read)(struct device *dev, unsigned int reg);
19};
20
21struct max7301_platform_data {
22	/* number assigned to the first GPIO */
23	unsigned	base;
24	/*
25	 * bitmask controlling the pullup configuration,
26	 *
27	 * _note_ the 4 lowest bits are unused, because the first 4
28	 * ports of the controller are not used, too.
29	 */
30	u32		input_pullup_active;
31};
32
33extern int __max730x_remove(struct device *dev);
34extern int __max730x_probe(struct max7301 *ts);
35#endif
36