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-rw-r--r--arch/arm/plat-tcc/clock.c179
1 files changed, 0 insertions, 179 deletions
diff --git a/arch/arm/plat-tcc/clock.c b/arch/arm/plat-tcc/clock.c
deleted file mode 100644
index f3ced10d5271..000000000000
--- a/arch/arm/plat-tcc/clock.c
+++ /dev/null
@@ -1,179 +0,0 @@
1/*
2 * Clock framework for Telechips SoCs
3 * Based on arch/arm/plat-mxc/clock.c
4 *
5 * Copyright (C) 2004 - 2005 Nokia corporation
6 * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
7 * Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
8 * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
9 * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
10 * Copyright 2010 Hans J. Koch, hjk@linutronix.de
11 *
12 * Licensed under the terms of the GPL v2.
13 */
14
15#include <linux/clk.h>
16#include <linux/err.h>
17#include <linux/errno.h>
18#include <linux/module.h>
19#include <linux/mutex.h>
20#include <linux/string.h>
21
22#include <mach/clock.h>
23#include <mach/hardware.h>
24
25static DEFINE_MUTEX(clocks_mutex);
26
27/*-------------------------------------------------------------------------
28 * Standard clock functions defined in include/linux/clk.h
29 *-------------------------------------------------------------------------*/
30
31static void __clk_disable(struct clk *clk)
32{
33 BUG_ON(clk->refcount == 0);
34
35 if (!(--clk->refcount) && clk->disable) {
36 /* Unconditionally disable the clock in hardware */
37 clk->disable(clk);
38 /* recursively disable parents */
39 if (clk->parent)
40 __clk_disable(clk->parent);
41 }
42}
43
44static int __clk_enable(struct clk *clk)
45{
46 int ret = 0;
47
48 if (clk->refcount++ == 0 && clk->enable) {
49 if (clk->parent)
50 ret = __clk_enable(clk->parent);
51 if (ret)
52 return ret;
53 else
54 return clk->enable(clk);
55 }
56
57 return 0;
58}
59
60/* This function increments the reference count on the clock and enables the
61 * clock if not already enabled. The parent clock tree is recursively enabled
62 */
63int clk_enable(struct clk *clk)
64{
65 int ret = 0;
66
67 if (!clk)
68 return -EINVAL;
69
70 mutex_lock(&clocks_mutex);
71 ret = __clk_enable(clk);
72 mutex_unlock(&clocks_mutex);
73
74 return ret;
75}
76EXPORT_SYMBOL_GPL(clk_enable);
77
78/* This function decrements the reference count on the clock and disables
79 * the clock when reference count is 0. The parent clock tree is
80 * recursively disabled
81 */
82void clk_disable(struct clk *clk)
83{
84 if (!clk)
85 return;
86
87 mutex_lock(&clocks_mutex);
88 __clk_disable(clk);
89 mutex_unlock(&clocks_mutex);
90}
91EXPORT_SYMBOL_GPL(clk_disable);
92
93/* Retrieve the *current* clock rate. If the clock itself
94 * does not provide a special calculation routine, ask
95 * its parent and so on, until one is able to return
96 * a valid clock rate
97 */
98unsigned long clk_get_rate(struct clk *clk)
99{
100 if (!clk)
101 return 0UL;
102
103 if (clk->get_rate)
104 return clk->get_rate(clk);
105
106 return clk_get_rate(clk->parent);
107}
108EXPORT_SYMBOL_GPL(clk_get_rate);
109
110/* Round the requested clock rate to the nearest supported
111 * rate that is less than or equal to the requested rate.
112 * This is dependent on the clock's current parent.
113 */
114long clk_round_rate(struct clk *clk, unsigned long rate)
115{
116 if (!clk)
117 return 0;
118 if (!clk->round_rate)
119 return 0;
120
121 return clk->round_rate(clk, rate);
122}
123EXPORT_SYMBOL_GPL(clk_round_rate);
124
125/* Set the clock to the requested clock rate. The rate must
126 * match a supported rate exactly based on what clk_round_rate returns
127 */
128int clk_set_rate(struct clk *clk, unsigned long rate)
129{
130 int ret = -EINVAL;
131
132 if (!clk)
133 return ret;
134 if (!clk->set_rate || !rate)
135 return ret;
136
137 mutex_lock(&clocks_mutex);
138 ret = clk->set_rate(clk, rate);
139 mutex_unlock(&clocks_mutex);
140
141 return ret;
142}
143EXPORT_SYMBOL_GPL(clk_set_rate);
144
145/* Set the clock's parent to another clock source */
146int clk_set_parent(struct clk *clk, struct clk *parent)
147{
148 struct clk *old;
149 int ret = -EINVAL;
150
151 if (!clk)
152 return ret;
153 if (!clk->set_parent || !parent)
154 return ret;
155
156 mutex_lock(&clocks_mutex);
157 old = clk->parent;
158 if (clk->refcount)
159 __clk_enable(parent);
160 ret = clk->set_parent(clk, parent);
161 if (ret)
162 old = parent;
163 if (clk->refcount)
164 __clk_disable(old);
165 mutex_unlock(&clocks_mutex);
166
167 return ret;
168}
169EXPORT_SYMBOL_GPL(clk_set_parent);
170
171/* Retrieve the clock's parent clock source */
172struct clk *clk_get_parent(struct clk *clk)
173{
174 if (!clk)
175 return NULL;
176
177 return clk->parent;
178}
179EXPORT_SYMBOL_GPL(clk_get_parent);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 00:40:41 -0500