leds-expresswire.h

 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
13struct gpio_desc;
14
15struct 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
26struct expresswire_common_props {
27	struct gpio_desc *ctrl_gpio;
28	struct expresswire_timing timing;
29};
30
31void expresswire_power_off(struct expresswire_common_props *props);
32void expresswire_enable(struct expresswire_common_props *props);
33void expresswire_write_u8(struct expresswire_common_props *props, u8 val);
34
35#endif /* _LEDS_EXPRESSWIRE_H */