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0a6d3158 LW |
1 | #ifndef __LINUX_GPIO_MACHINE_H |
2 | #define __LINUX_GPIO_MACHINE_H | |
3 | ||
b3ea074f AC |
4 | #include <linux/types.h> |
5 | #include <linux/list.h> | |
6 | ||
0a6d3158 LW |
7 | enum gpio_lookup_flags { |
8 | GPIO_ACTIVE_HIGH = (0 << 0), | |
9 | GPIO_ACTIVE_LOW = (1 << 0), | |
10 | GPIO_OPEN_DRAIN = (1 << 1), | |
11 | GPIO_OPEN_SOURCE = (1 << 2), | |
05f479bf CK |
12 | GPIO_SLEEP_MAINTAIN_VALUE = (0 << 3), |
13 | GPIO_SLEEP_MAY_LOOSE_VALUE = (1 << 3), | |
0a6d3158 LW |
14 | }; |
15 | ||
16 | /** | |
17 | * struct gpiod_lookup - lookup table | |
18 | * @chip_label: name of the chip the GPIO belongs to | |
19 | * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO | |
20 | * @con_id: name of the GPIO from the device's point of view | |
21 | * @idx: index of the GPIO in case several GPIOs share the same name | |
22 | * @flags: mask of GPIO_* values | |
23 | * | |
24 | * gpiod_lookup is a lookup table for associating GPIOs to specific devices and | |
25 | * functions using platform data. | |
26 | */ | |
27 | struct gpiod_lookup { | |
28 | const char *chip_label; | |
29 | u16 chip_hwnum; | |
30 | const char *con_id; | |
31 | unsigned int idx; | |
32 | enum gpio_lookup_flags flags; | |
33 | }; | |
34 | ||
35 | struct gpiod_lookup_table { | |
36 | struct list_head list; | |
37 | const char *dev_id; | |
38 | struct gpiod_lookup table[]; | |
39 | }; | |
40 | ||
41 | /* | |
42 | * Simple definition of a single GPIO under a con_id | |
43 | */ | |
44 | #define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \ | |
45 | GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags) | |
46 | ||
47 | /* | |
48 | * Use this macro if you need to have several GPIOs under the same con_id. | |
49 | * Each GPIO needs to use a different index and can be accessed using | |
50 | * gpiod_get_index() | |
51 | */ | |
52 | #define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \ | |
53 | { \ | |
54 | .chip_label = _chip_label, \ | |
55 | .chip_hwnum = _chip_hwnum, \ | |
56 | .con_id = _con_id, \ | |
57 | .idx = _idx, \ | |
58 | .flags = _flags, \ | |
59 | } | |
60 | ||
020e0b1c | 61 | #ifdef CONFIG_GPIOLIB |
0a6d3158 | 62 | void gpiod_add_lookup_table(struct gpiod_lookup_table *table); |
be9015ab | 63 | void gpiod_remove_lookup_table(struct gpiod_lookup_table *table); |
020e0b1c AG |
64 | #else |
65 | static inline | |
66 | void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {} | |
67 | static inline | |
68 | void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {} | |
69 | #endif | |
0a6d3158 LW |
70 | |
71 | #endif /* __LINUX_GPIO_MACHINE_H */ |