1 /*-
2  * Copyright (c) 2022 Vladimir Kondratyev <wulf@FreeBSD.org>
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  */
25 
26 #ifndef _LINUXKPI_LINUX_PWM_H_
27 #define	_LINUXKPI_LINUX_PWM_H_
28 
29 #include <linux/device.h>
30 #include <linux/err.h>
31 
32 struct pwm_state {
33 	uint64_t period;
34 	bool enabled;
35 };
36 
37 struct pwm_device {
38 	struct pwm_state state;
39 };
40 
41 static inline struct pwm_device *
42 pwm_get(struct device *dev, const char *consumer)
43 {
44 	return (ERR_PTR(-ENODEV));
45 }
46 
47 static inline void
48 pwm_put(struct pwm_device *pwm)
49 {
50 }
51 
52 static inline int
53 pwm_enable(struct pwm_device *pwm)
54 {
55 	return (-EINVAL);
56 }
57 
58 static inline void
59 pwm_disable(struct pwm_device *pwm)
60 {
61 }
62 
63 static inline bool
64 pwm_is_enabled(const struct pwm_device *pwm)
65 {
66 	return (false);
67 }
68 
69 static inline unsigned int
70 pwm_get_relative_duty_cycle(const struct pwm_state *state, unsigned int scale)
71 {
72 	return (0);
73 }
74 
75 static inline int
76 pwm_set_relative_duty_cycle(struct pwm_state *state, unsigned int duty_cycle,
77     unsigned int scale)
78 {
79 	return (0);
80 }
81 
82 static inline void
83 pwm_get_state(const struct pwm_device *pwm, struct pwm_state *state)
84 {
85 	*state = pwm->state;
86 }
87 
88 static inline int
89 pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
90 {
91 	return (-ENOTSUPP);
92 }
93 
94 #endif	/* _LINUXKPI_LINUX_PWM_H_ */
95