Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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_start(struct expresswire_common_props *props);
34void expresswire_end(struct expresswire_common_props *props);
35void expresswire_set_bit(struct expresswire_common_props *props, bool bit);
36void expresswire_write_u8(struct expresswire_common_props *props, u8 val);
37
38#endif /* _LEDS_EXPRESSWIRE_H */