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1 | /* arch/arm/mach-msm/vreg.c |
2 | * | |
3 | * Copyright (C) 2008 Google, Inc. | |
4 | * Author: Brian Swetland <swetland@google.com> | |
5 | * | |
6 | * This software is licensed under the terms of the GNU General Public | |
7 | * License version 2, as published by the Free Software Foundation, and | |
8 | * may be copied, distributed, and modified under those terms. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/debugfs.h> | |
21 | #include <mach/vreg.h> | |
22 | ||
23 | #include "proc_comm.h" | |
24 | ||
25 | struct vreg { | |
26 | const char *name; | |
27 | unsigned id; | |
28 | }; | |
29 | ||
30 | #define VREG(_name, _id) { .name = _name, .id = _id, } | |
31 | ||
32 | static struct vreg vregs[] = { | |
33 | VREG("msma", 0), | |
34 | VREG("msmp", 1), | |
35 | VREG("msme1", 2), | |
36 | VREG("msmc1", 3), | |
37 | VREG("msmc2", 4), | |
38 | VREG("gp3", 5), | |
39 | VREG("msme2", 6), | |
40 | VREG("gp4", 7), | |
41 | VREG("gp1", 8), | |
42 | VREG("tcxo", 9), | |
43 | VREG("pa", 10), | |
44 | VREG("rftx", 11), | |
45 | VREG("rfrx1", 12), | |
46 | VREG("rfrx2", 13), | |
47 | VREG("synt", 14), | |
48 | VREG("wlan", 15), | |
49 | VREG("usb", 16), | |
50 | VREG("boost", 17), | |
51 | VREG("mmc", 18), | |
52 | VREG("ruim", 19), | |
53 | VREG("msmc0", 20), | |
54 | VREG("gp2", 21), | |
55 | VREG("gp5", 22), | |
56 | VREG("gp6", 23), | |
57 | VREG("rf", 24), | |
58 | VREG("rf_vco", 26), | |
59 | VREG("mpll", 27), | |
60 | VREG("s2", 28), | |
61 | VREG("s3", 29), | |
62 | VREG("rfubm", 30), | |
63 | VREG("ncp", 31), | |
64 | }; | |
65 | ||
66 | struct vreg *vreg_get(struct device *dev, const char *id) | |
67 | { | |
68 | int n; | |
69 | for (n = 0; n < ARRAY_SIZE(vregs); n++) { | |
70 | if (!strcmp(vregs[n].name, id)) | |
71 | return vregs + n; | |
72 | } | |
73 | return 0; | |
74 | } | |
75 | ||
76 | void vreg_put(struct vreg *vreg) | |
77 | { | |
78 | } | |
79 | ||
80 | int vreg_enable(struct vreg *vreg) | |
81 | { | |
82 | unsigned id = vreg->id; | |
83 | unsigned enable = 1; | |
84 | return msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable); | |
85 | } | |
86 | ||
87 | void vreg_disable(struct vreg *vreg) | |
88 | { | |
89 | unsigned id = vreg->id; | |
90 | unsigned enable = 0; | |
91 | msm_proc_comm(PCOM_VREG_SWITCH, &id, &enable); | |
92 | } | |
93 | ||
94 | int vreg_set_level(struct vreg *vreg, unsigned mv) | |
95 | { | |
96 | unsigned id = vreg->id; | |
97 | return msm_proc_comm(PCOM_VREG_SET_LEVEL, &id, &mv); | |
98 | } | |
99 | ||
100 | #if defined(CONFIG_DEBUG_FS) | |
101 | ||
102 | static int vreg_debug_set(void *data, u64 val) | |
103 | { | |
104 | struct vreg *vreg = data; | |
105 | switch (val) { | |
106 | case 0: | |
107 | vreg_disable(vreg); | |
108 | break; | |
109 | case 1: | |
110 | vreg_enable(vreg); | |
111 | break; | |
112 | default: | |
113 | vreg_set_level(vreg, val); | |
114 | break; | |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
119 | static int vreg_debug_get(void *data, u64 *val) | |
120 | { | |
121 | return -ENOSYS; | |
122 | } | |
123 | ||
124 | DEFINE_SIMPLE_ATTRIBUTE(vreg_fops, vreg_debug_get, vreg_debug_set, "%llu\n"); | |
125 | ||
126 | static int __init vreg_debug_init(void) | |
127 | { | |
128 | struct dentry *dent; | |
129 | int n; | |
130 | ||
131 | dent = debugfs_create_dir("vreg", 0); | |
132 | if (IS_ERR(dent)) | |
133 | return 0; | |
134 | ||
135 | for (n = 0; n < ARRAY_SIZE(vregs); n++) | |
136 | (void) debugfs_create_file(vregs[n].name, 0644, | |
137 | dent, vregs + n, &vreg_fops); | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | device_initcall(vreg_debug_init); | |
143 | #endif |