1 #ifndef __LINUX_GPIO_MACHINE_H
2 #define __LINUX_GPIO_MACHINE_H
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),
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
19 * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
20 * functions using platform data.
23 const char *chip_label;
27 enum gpio_lookup_flags flags;
30 struct gpiod_lookup_table {
31 struct list_head list;
33 struct gpiod_lookup table[];
37 * Simple definition of a single GPIO under a con_id
39 #define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
40 GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
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
47 #define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags) \
49 .chip_label = _chip_label, \
50 .chip_hwnum = _chip_hwnum, \
56 void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
58 #endif /* __LINUX_GPIO_MACHINE_H */