1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#ifndef _PWMBUS_H_
31#define _PWMBUS_H_
32
33struct pwmbus_softc {
34	device_t	dev;
35	u_int		nchannels;
36};
37
38struct pwmbus_ivars {
39	u_int	pi_channel;
40};
41
42enum {
43	PWMBUS_IVAR_CHANNEL,	/* Channel used by child dev */
44};
45
46#define PWMBUS_ACCESSOR(A, B, T)					\
47static inline int							\
48pwmbus_get_ ## A(device_t dev, T *t)					\
49{									\
50	return BUS_READ_IVAR(device_get_parent(dev), dev,		\
51	    PWMBUS_IVAR_ ## B, (uintptr_t *) t);			\
52}									\
53static inline int							\
54pwmbus_set_ ## A(device_t dev, T t)					\
55{									\
56	return BUS_WRITE_IVAR(device_get_parent(dev), dev,		\
57	    PWMBUS_IVAR_ ## B, (uintptr_t) t);				\
58}
59
60PWMBUS_ACCESSOR(channel, CHANNEL, u_int)
61
62#ifdef FDT
63#define	PWMBUS_FDT_PNP_INFO(t)	FDTCOMPAT_PNP_INFO(t, pwmbus)
64#else
65#define	PWMBUS_FDT_PNP_INFO(t)
66#endif
67
68extern driver_t   pwmbus_driver;
69extern devclass_t pwmbus_devclass;
70extern driver_t   ofw_pwmbus_driver;
71extern devclass_t ofw_pwmbus_devclass;
72
73#endif /* _PWMBUS_H_ */
74