blob: 63b7113110869dc0ab48b14b81f2361ded53e314 [file] [log] [blame]
Daniel Walker5e96da52010-05-12 13:43:28 -07001/*
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"
Stephen Boydce1c80f2011-01-26 16:20:53 -080023#include "clock-pcom.h"
Daniel Walker5e96da52010-05-12 13:43:28 -070024
25/*
26 * glue for the proc_comm interface
27 */
28int pc_clk_enable(unsigned id)
29{
30 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL);
31 if (rc < 0)
32 return rc;
33 else
34 return (int)id < 0 ? -EINVAL : 0;
35}
36
37void pc_clk_disable(unsigned id)
38{
39 msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL);
40}
41
42int pc_clk_reset(unsigned id, enum clk_reset_action action)
43{
44 int rc;
45
46 if (action == CLK_RESET_ASSERT)
47 rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL);
48 else
49 rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL);
50
51 if (rc < 0)
52 return rc;
53 else
54 return (int)id < 0 ? -EINVAL : 0;
55}
56
57int pc_clk_set_rate(unsigned id, unsigned rate)
58{
59 /* The rate _might_ be rounded off to the nearest KHz value by the
60 * remote function. So a return value of 0 doesn't necessarily mean
61 * that the exact rate was set successfully.
62 */
63 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate);
64 if (rc < 0)
65 return rc;
66 else
67 return (int)id < 0 ? -EINVAL : 0;
68}
69
70int pc_clk_set_min_rate(unsigned id, unsigned rate)
71{
72 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate);
73 if (rc < 0)
74 return rc;
75 else
76 return (int)id < 0 ? -EINVAL : 0;
77}
78
79int pc_clk_set_max_rate(unsigned id, unsigned rate)
80{
81 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate);
82 if (rc < 0)
83 return rc;
84 else
85 return (int)id < 0 ? -EINVAL : 0;
86}
87
88int pc_clk_set_flags(unsigned id, unsigned flags)
89{
90 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags);
91 if (rc < 0)
92 return rc;
93 else
94 return (int)id < 0 ? -EINVAL : 0;
95}
96
97unsigned pc_clk_get_rate(unsigned id)
98{
99 if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL))
100 return 0;
101 else
102 return id;
103}
104
105unsigned pc_clk_is_enabled(unsigned id)
106{
107 if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL))
108 return 0;
109 else
110 return id;
111}
112
113long pc_clk_round_rate(unsigned id, unsigned rate)
114{
115
116 /* Not really supported; pc_clk_set_rate() does rounding on it's own. */
117 return rate;
118}
119
Stephen Boyd2a522202011-02-23 09:37:41 -0800120static bool pc_clk_is_local(unsigned id)
121{
122 return false;
123}
124
Daniel Walker5e96da52010-05-12 13:43:28 -0700125struct clk_ops clk_ops_pcom = {
126 .enable = pc_clk_enable,
127 .disable = pc_clk_disable,
128 .auto_off = pc_clk_disable,
129 .reset = pc_clk_reset,
130 .set_rate = pc_clk_set_rate,
131 .set_min_rate = pc_clk_set_min_rate,
132 .set_max_rate = pc_clk_set_max_rate,
133 .set_flags = pc_clk_set_flags,
134 .get_rate = pc_clk_get_rate,
135 .is_enabled = pc_clk_is_enabled,
136 .round_rate = pc_clk_round_rate,
Stephen Boyd2a522202011-02-23 09:37:41 -0800137 .is_local = pc_clk_is_local,
Daniel Walker5e96da52010-05-12 13:43:28 -0700138};