1 /* $NetBSD: consumer.h,v 1.5 2018/11/19 10:48:59 maya Exp $ */
2
3 /*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LINUX_REGULATOR_CONSUMER_H_
33 #define _LINUX_REGULATOR_CONSUMER_H_
34
35 #ifdef _KERNEL_OPT
36 #include "opt_fdt.h"
37 #endif
38
39 #ifdef FDT
40
41 #include <machine/limits.h>
42 #include <dev/fdt/fdtvar.h>
43
44 struct regulator {
45 struct fdtbus_regulator regulator;
46 };
47
48 static inline int
regulator_get_voltage(struct regulator * reg)49 regulator_get_voltage(struct regulator *reg)
50 {
51 unsigned uvolt;
52 int error;
53
54 error = fdtbus_regulator_get_voltage(®->regulator, &uvolt);
55 if (error) {
56 /* XXX errno NetBSD->Linux */
57 KASSERTMSG(error > 0, "negative error: %d", error);
58 return -error;
59 }
60
61 KASSERTMSG(uvolt <= INT_MAX, "high voltage: %u uV", uvolt);
62 return (int)uvolt;
63 }
64
65 static inline int
regulator_set_voltage(struct regulator * reg,int min_uvolt,int max_uvolt)66 regulator_set_voltage(struct regulator *reg, int min_uvolt, int max_uvolt)
67 {
68
69 if (min_uvolt < 0 || max_uvolt < 0)
70 return -EINVAL;
71
72 /* XXX errno NetBSD->Linux */
73 return -fdtbus_regulator_set_voltage(®->regulator, min_uvolt,
74 max_uvolt);
75 }
76
77 #else
78
79 struct regulator;
80
81 static inline int
regulator_get_voltage(struct regulator * reg)82 regulator_get_voltage(struct regulator *reg)
83 {
84 panic("no voltage regulators here");
85 }
86
87 static inline int
regulator_set_voltage(struct regulator * reg,int min_uvolt,int max_uvolt)88 regulator_set_voltage(struct regulator *reg, int min_uvolt, int max_uvolt)
89 {
90 panic("no voltage regulators here");
91 }
92
93
94 #endif
95
96 #endif /* _LINUX_REGULATOR_CONSUMER_H_ */
97