1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
28#ifndef _PWMBUS_H_
29#define _PWMBUS_H_
30
31struct pwmbus_softc {
32 device_t dev;
33 u_int nchannels;
34};
35
36struct pwmbus_ivars {
37 u_int pi_channel;
38};
39
40enum {
41 PWMBUS_IVAR_CHANNEL, /* Channel used by child dev */
42};
43
44#define PWMBUS_ACCESSOR(A, B, T) \
45static inline int \
46pwmbus_get_ ## A(device_t dev, T *t) \
47{ \
48 return BUS_READ_IVAR(device_get_parent(dev), dev, \
49 PWMBUS_IVAR_ ## B, (uintptr_t *) t); \
50} \
51static inline int \
52pwmbus_set_ ## A(device_t dev, T t) \
53{ \
54 return BUS_WRITE_IVAR(device_get_parent(dev), dev, \
55 PWMBUS_IVAR_ ## B, (uintptr_t) t); \
56}
57
58PWMBUS_ACCESSOR(channel, CHANNEL, u_int)
59
60#ifdef FDT
61#define PWMBUS_FDT_PNP_INFO(t) FDTCOMPAT_PNP_INFO(t, pwmbus)
62#else
63#define PWMBUS_FDT_PNP_INFO(t)
64#endif
65
66extern driver_t pwmbus_driver;
67extern driver_t ofw_pwmbus_driver;
68
69#endif /* _PWMBUS_H_ */