2 * Copyright (C) 2007 Google, Inc.
3 * Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
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.
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.
16 #include <linux/err.h>
17 #include <linux/ctype.h>
18 #include <linux/stddef.h>
21 #include "proc_comm.h"
23 #include "clock-pcom.h"
26 * glue for the proc_comm interface
28 static int pc_clk_enable(unsigned id)
30 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL);
34 return (int)id < 0 ? -EINVAL : 0;
37 static void pc_clk_disable(unsigned id)
39 msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL);
42 int pc_clk_reset(unsigned id, enum clk_reset_action action)
46 if (action == CLK_RESET_ASSERT)
47 rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL);
49 rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL);
54 return (int)id < 0 ? -EINVAL : 0;
57 static int pc_clk_set_rate(unsigned id, unsigned rate)
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.
63 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate);
67 return (int)id < 0 ? -EINVAL : 0;
70 static int pc_clk_set_min_rate(unsigned id, unsigned rate)
72 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate);
76 return (int)id < 0 ? -EINVAL : 0;
79 static int pc_clk_set_max_rate(unsigned id, unsigned rate)
81 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate);
85 return (int)id < 0 ? -EINVAL : 0;
88 static int pc_clk_set_flags(unsigned id, unsigned flags)
90 int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags);
94 return (int)id < 0 ? -EINVAL : 0;
97 static unsigned pc_clk_get_rate(unsigned id)
99 if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL))
105 static unsigned pc_clk_is_enabled(unsigned id)
107 if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL))
113 static long pc_clk_round_rate(unsigned id, unsigned rate)
116 /* Not really supported; pc_clk_set_rate() does rounding on it's own. */
120 static bool pc_clk_is_local(unsigned id)
125 struct 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,
137 .is_local = pc_clk_is_local,