1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef LINUX_SPI_MAX7301_H |
3 | #define LINUX_SPI_MAX7301_H |
4 | |
5 | #include <linux/gpio/driver.h> |
6 | |
7 | /* |
8 | * Some registers must be read back to modify. |
9 | * To save time we cache them here in memory |
10 | */ |
11 | struct max7301 { |
12 | struct mutex lock; |
13 | u8 port_config[8]; /* field 0 is unused */ |
14 | u32 out_level; /* cached output levels */ |
15 | u32 input_pullup_active; |
16 | struct gpio_chip chip; |
17 | struct device *dev; |
18 | int (*write)(struct device *dev, unsigned int reg, unsigned int val); |
19 | int (*read)(struct device *dev, unsigned int reg); |
20 | }; |
21 | |
22 | struct max7301_platform_data { |
23 | /* number assigned to the first GPIO */ |
24 | unsigned base; |
25 | /* |
26 | * bitmask controlling the pullup configuration, |
27 | * |
28 | * _note_ the 4 lowest bits are unused, because the first 4 |
29 | * ports of the controller are not used, too. |
30 | */ |
31 | u32 input_pullup_active; |
32 | }; |
33 | |
34 | extern void __max730x_remove(struct device *dev); |
35 | extern int __max730x_probe(struct max7301 *ts); |
36 | #endif |
37 | |