Linus Walleij | 0a6d315 | 2014-07-24 20:08:55 +0200 | [diff] [blame^] | 1 | #ifndef __LINUX_GPIO_MACHINE_H |
| 2 | #define __LINUX_GPIO_MACHINE_H |
| 3 | |
| 4 | enum gpio_lookup_flags { |
| 5 | GPIO_ACTIVE_HIGH = (0 << 0), |
| 6 | GPIO_ACTIVE_LOW = (1 << 0), |
| 7 | GPIO_OPEN_DRAIN = (1 << 1), |
| 8 | GPIO_OPEN_SOURCE = (1 << 2), |
| 9 | }; |
| 10 | |
| 11 | /** |
| 12 | * struct gpiod_lookup - lookup table |
| 13 | * @chip_label: name of the chip the GPIO belongs to |
| 14 | * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO |
| 15 | * @con_id: name of the GPIO from the device's point of view |
| 16 | * @idx: index of the GPIO in case several GPIOs share the same name |
| 17 | * @flags: mask of GPIO_* values |
| 18 | * |
| 19 | * gpiod_lookup is a lookup table for associating GPIOs to specific devices and |
| 20 | * functions using platform data. |
| 21 | */ |
| 22 | struct gpiod_lookup { |
| 23 | const char *chip_label; |
| 24 | u16 chip_hwnum; |
| 25 | const char *con_id; |
| 26 | unsigned int idx; |
| 27 | enum gpio_lookup_flags flags; |
| 28 | }; |
| 29 | |
| 30 | struct gpiod_lookup_table { |
| 31 | struct list_head list; |
| 32 | const char *dev_id; |
| 33 | struct gpiod_lookup table[]; |
| 34 | }; |
| 35 | |
| 36 | /* |
| 37 | * Simple definition of a single GPIO under a con_id |
| 38 | */ |
| 39 | #define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \ |
| 40 | GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags) |
| 41 | |
| 42 | /* |
| 43 | * Use this macro if you need to have several GPIOs under the same con_id. |
| 44 | * Each GPIO needs to use a different index and can be accessed using |
| 45 | * gpiod_get_index() |
| 46 | */ |
| 47 | #define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \ |
| 48 | { \ |
| 49 | .chip_label = _chip_label, \ |
| 50 | .chip_hwnum = _chip_hwnum, \ |
| 51 | .con_id = _con_id, \ |
| 52 | .idx = _idx, \ |
| 53 | .flags = _flags, \ |
| 54 | } |
| 55 | |
| 56 | void gpiod_add_lookup_table(struct gpiod_lookup_table *table); |
| 57 | |
| 58 | #endif /* __LINUX_GPIO_MACHINE_H */ |