1 /*
2 * SH-Mobile Clock Framework
3 *
4 * Copyright (C) 2010 Magnus Damm
5 *
6 * Used together with arch/arm/common/clkdev.c and drivers/sh/clk.c.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 */
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24
25 #ifdef CONFIG_COMMON_CLK
26 #include <linux/clk.h>
27 #include <linux/clkdev.h>
28 #include "clock.h"
29
shmobile_clk_workaround(const struct clk_name * clks,int nr_clks,bool enable)30 void __init shmobile_clk_workaround(const struct clk_name *clks,
31 int nr_clks, bool enable)
32 {
33 const struct clk_name *clkn;
34 struct clk *clk;
35 unsigned int i;
36
37 for (i = 0; i < nr_clks; ++i) {
38 clkn = clks + i;
39 clk = clk_get(NULL, clkn->clk);
40 if (!IS_ERR(clk)) {
41 clk_register_clkdev(clk, clkn->con_id, clkn->dev_id);
42 if (enable)
43 clk_prepare_enable(clk);
44 clk_put(clk);
45 }
46 }
47 }
48
49 #else /* CONFIG_COMMON_CLK */
50 #include <linux/sh_clk.h>
51 #include <linux/export.h>
52 #include "clock.h"
53 #include "common.h"
54
shmobile_fixed_ratio_clk_recalc(struct clk * clk)55 unsigned long shmobile_fixed_ratio_clk_recalc(struct clk *clk)
56 {
57 struct clk_ratio *p = clk->priv;
58
59 return clk->parent->rate / p->div * p->mul;
60 };
61
62 struct sh_clk_ops shmobile_fixed_ratio_clk_ops = {
63 .recalc = shmobile_fixed_ratio_clk_recalc,
64 };
65
shmobile_clk_init(void)66 int __init shmobile_clk_init(void)
67 {
68 /* Kick the child clocks.. */
69 recalculate_root_clocks();
70
71 /* Enable the necessary init clocks */
72 clk_enable_init_clocks();
73
74 return 0;
75 }
76
__clk_get(struct clk * clk)77 int __clk_get(struct clk *clk)
78 {
79 return 1;
80 }
81 EXPORT_SYMBOL(__clk_get);
82
__clk_put(struct clk * clk)83 void __clk_put(struct clk *clk)
84 {
85 }
86 EXPORT_SYMBOL(__clk_put);
87
88 #endif /* CONFIG_COMMON_CLK */
89