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1 | #ifndef LINUX_SPI_MAX7301_H |
2 | #define LINUX_SPI_MAX7301_H | |
3 | ||
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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 | */ | |
10 | struct max7301 { | |
11 | struct mutex lock; | |
12 | u8 port_config[8]; /* field 0 is unused */ | |
13 | u32 out_level; /* cached output levels */ | |
4a22b8a4 | 14 | u32 input_pullup_active; |
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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 | ||
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21 | struct max7301_platform_data { |
22 | /* number assigned to the first GPIO */ | |
23 | unsigned base; | |
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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; | |
0c36ec31 JB |
31 | }; |
32 | ||
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33 | extern int __max730x_remove(struct device *dev); |
34 | extern int __max730x_probe(struct max7301 *ts); | |
0c36ec31 | 35 | #endif |