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5e96da5d DW |
1 | /* |
2 | * Copyright (C) 2007 Google, Inc. | |
3 | * Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved. | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/err.h> | |
17 | #include <linux/ctype.h> | |
18 | #include <linux/stddef.h> | |
19 | #include <mach/clk.h> | |
20 | ||
21 | #include "proc_comm.h" | |
22 | #include "clock.h" | |
23 | ||
24 | /* | |
25 | * glue for the proc_comm interface | |
26 | */ | |
27 | int pc_clk_enable(unsigned id) | |
28 | { | |
29 | int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL); | |
30 | if (rc < 0) | |
31 | return rc; | |
32 | else | |
33 | return (int)id < 0 ? -EINVAL : 0; | |
34 | } | |
35 | ||
36 | void pc_clk_disable(unsigned id) | |
37 | { | |
38 | msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL); | |
39 | } | |
40 | ||
41 | int pc_clk_reset(unsigned id, enum clk_reset_action action) | |
42 | { | |
43 | int rc; | |
44 | ||
45 | if (action == CLK_RESET_ASSERT) | |
46 | rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL); | |
47 | else | |
48 | rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL); | |
49 | ||
50 | if (rc < 0) | |
51 | return rc; | |
52 | else | |
53 | return (int)id < 0 ? -EINVAL : 0; | |
54 | } | |
55 | ||
56 | int pc_clk_set_rate(unsigned id, unsigned rate) | |
57 | { | |
58 | /* The rate _might_ be rounded off to the nearest KHz value by the | |
59 | * remote function. So a return value of 0 doesn't necessarily mean | |
60 | * that the exact rate was set successfully. | |
61 | */ | |
62 | int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate); | |
63 | if (rc < 0) | |
64 | return rc; | |
65 | else | |
66 | return (int)id < 0 ? -EINVAL : 0; | |
67 | } | |
68 | ||
69 | int pc_clk_set_min_rate(unsigned id, unsigned rate) | |
70 | { | |
71 | int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate); | |
72 | if (rc < 0) | |
73 | return rc; | |
74 | else | |
75 | return (int)id < 0 ? -EINVAL : 0; | |
76 | } | |
77 | ||
78 | int pc_clk_set_max_rate(unsigned id, unsigned rate) | |
79 | { | |
80 | int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate); | |
81 | if (rc < 0) | |
82 | return rc; | |
83 | else | |
84 | return (int)id < 0 ? -EINVAL : 0; | |
85 | } | |
86 | ||
87 | int pc_clk_set_flags(unsigned id, unsigned flags) | |
88 | { | |
89 | int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags); | |
90 | if (rc < 0) | |
91 | return rc; | |
92 | else | |
93 | return (int)id < 0 ? -EINVAL : 0; | |
94 | } | |
95 | ||
96 | unsigned pc_clk_get_rate(unsigned id) | |
97 | { | |
98 | if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL)) | |
99 | return 0; | |
100 | else | |
101 | return id; | |
102 | } | |
103 | ||
104 | unsigned pc_clk_is_enabled(unsigned id) | |
105 | { | |
106 | if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL)) | |
107 | return 0; | |
108 | else | |
109 | return id; | |
110 | } | |
111 | ||
112 | long pc_clk_round_rate(unsigned id, unsigned rate) | |
113 | { | |
114 | ||
115 | /* Not really supported; pc_clk_set_rate() does rounding on it's own. */ | |
116 | return rate; | |
117 | } | |
118 | ||
119 | struct clk_ops clk_ops_pcom = { | |
120 | .enable = pc_clk_enable, | |
121 | .disable = pc_clk_disable, | |
122 | .auto_off = pc_clk_disable, | |
123 | .reset = pc_clk_reset, | |
124 | .set_rate = pc_clk_set_rate, | |
125 | .set_min_rate = pc_clk_set_min_rate, | |
126 | .set_max_rate = pc_clk_set_max_rate, | |
127 | .set_flags = pc_clk_set_flags, | |
128 | .get_rate = pc_clk_get_rate, | |
129 | .is_enabled = pc_clk_is_enabled, | |
130 | .round_rate = pc_clk_round_rate, | |
131 | }; |