| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|
| 2 | /* |
|---|
| 3 | * Shared library for Kinetic's ExpressWire protocol. |
|---|
| 4 | * This protocol works by pulsing the ExpressWire IC's control GPIO. |
|---|
| 5 | * ktd2692 and ktd2801 are known to use this protocol. |
|---|
| 6 | */ |
|---|
| 7 | |
|---|
| 8 | #ifndef _LEDS_EXPRESSWIRE_H |
|---|
| 9 | #define _LEDS_EXPRESSWIRE_H |
|---|
| 10 | |
|---|
| 11 | #include <linux/types.h> |
|---|
| 12 | |
|---|
| 13 | struct gpio_desc; |
|---|
| 14 | |
|---|
| 15 | struct expresswire_timing { |
|---|
| 16 | unsigned long poweroff_us; |
|---|
| 17 | unsigned long detect_delay_us; |
|---|
| 18 | unsigned long detect_us; |
|---|
| 19 | unsigned long data_start_us; |
|---|
| 20 | unsigned long end_of_data_low_us; |
|---|
| 21 | unsigned long end_of_data_high_us; |
|---|
| 22 | unsigned long short_bitset_us; |
|---|
| 23 | unsigned long long_bitset_us; |
|---|
| 24 | }; |
|---|
| 25 | |
|---|
| 26 | struct expresswire_common_props { |
|---|
| 27 | struct gpio_desc *ctrl_gpio; |
|---|
| 28 | struct expresswire_timing timing; |
|---|
| 29 | }; |
|---|
| 30 | |
|---|
| 31 | void expresswire_power_off(struct expresswire_common_props *props); |
|---|
| 32 | void expresswire_enable(struct expresswire_common_props *props); |
|---|
| 33 | void expresswire_start(struct expresswire_common_props *props); |
|---|
| 34 | void expresswire_end(struct expresswire_common_props *props); |
|---|
| 35 | void expresswire_set_bit(struct expresswire_common_props *props, bool bit); |
|---|
| 36 | void expresswire_write_u8(struct expresswire_common_props *props, u8 val); |
|---|
| 37 | |
|---|
| 38 | #endif /* _LEDS_EXPRESSWIRE_H */ |
|---|
| 39 | |
|---|
