2 * arch/sh/kernel/cpu/sh4a/clock-sh7763.c
4 * SH7763 support for the clock framework
6 * Copyright (C) 2005 Paul Mundt
7 * Copyright (C) 2007 Yoshihiro Shimoda
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <asm/clock.h>
19 static int bfc_divisors[] = { 1, 1, 1, 8, 1, 1, 1, 1 };
20 static int p0fc_divisors[] = { 1, 1, 1, 8, 1, 1, 1, 1 };
21 static int cfc_divisors[] = { 1, 1, 4, 1, 1, 1, 1, 1 };
23 static void master_clk_init(struct clk *clk)
25 clk->rate *= p0fc_divisors[(ctrl_inl(FRQCR) >> 4) & 0x07];
28 static struct clk_ops sh7763_master_clk_ops = {
29 .init = master_clk_init,
32 static unsigned long module_clk_recalc(struct clk *clk)
34 int idx = ((ctrl_inl(FRQCR) >> 4) & 0x07);
35 return clk->parent->rate / p0fc_divisors[idx];
38 static struct clk_ops sh7763_module_clk_ops = {
39 .recalc = module_clk_recalc,
42 static unsigned long bus_clk_recalc(struct clk *clk)
44 int idx = ((ctrl_inl(FRQCR) >> 16) & 0x07);
45 return clk->parent->rate / bfc_divisors[idx];
48 static struct clk_ops sh7763_bus_clk_ops = {
49 .recalc = bus_clk_recalc,
52 static struct clk_ops sh7763_cpu_clk_ops = {
53 .recalc = followparent_recalc,
56 static struct clk_ops *sh7763_clk_ops[] = {
57 &sh7763_master_clk_ops,
58 &sh7763_module_clk_ops,
63 void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
65 if (idx < ARRAY_SIZE(sh7763_clk_ops))
66 *ops = sh7763_clk_ops[idx];
69 static unsigned long shyway_clk_recalc(struct clk *clk)
71 int idx = ((ctrl_inl(FRQCR) >> 20) & 0x07);
72 return clk->parent->rate / cfc_divisors[idx];
75 static struct clk_ops sh7763_shyway_clk_ops = {
76 .recalc = shyway_clk_recalc,
79 static struct clk sh7763_shyway_clk = {
81 .flags = CLK_ENABLE_ON_INIT,
82 .ops = &sh7763_shyway_clk_ops,
86 * Additional SH7763-specific on-chip clocks that aren't already part of the
89 static struct clk *sh7763_onchip_clocks[] = {
93 static int __init sh7763_clk_init(void)
95 struct clk *clk = clk_get(NULL, "master_clk");
98 for (i = 0; i < ARRAY_SIZE(sh7763_onchip_clocks); i++) {
99 struct clk *clkp = sh7763_onchip_clocks[i];
102 ret |= clk_register(clkp);
109 arch_initcall(sh7763_clk_init);