2 * arch/sh/kernel/cpu/sh4a/clock-sh7770.c
4 * SH7770 support for the clock framework
6 * Copyright (C) 2005 Paul Mundt
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <asm/clock.h>
18 static int ifc_divisors[] = { 1, 1, 1, 1, 1, 1, 1, 1 };
19 static int bfc_divisors[] = { 1, 1, 1, 1, 1, 8,12, 1 };
20 static int pfc_divisors[] = { 1, 8, 1,10,12,16, 1, 1 };
22 static void master_clk_init(struct clk *clk)
24 clk->rate *= pfc_divisors[(ctrl_inl(FRQCR) >> 28) & 0x000f];
27 static struct clk_ops sh7770_master_clk_ops = {
28 .init = master_clk_init,
31 static void module_clk_recalc(struct clk *clk)
33 int idx = ((ctrl_inl(FRQCR) >> 28) & 0x000f);
34 clk->rate = clk->parent->rate / pfc_divisors[idx];
37 static struct clk_ops sh7770_module_clk_ops = {
38 .recalc = module_clk_recalc,
41 static void bus_clk_recalc(struct clk *clk)
43 int idx = (ctrl_inl(FRQCR) & 0x000f);
44 clk->rate = clk->parent->rate / bfc_divisors[idx];
47 static struct clk_ops sh7770_bus_clk_ops = {
48 .recalc = bus_clk_recalc,
51 static void cpu_clk_recalc(struct clk *clk)
53 int idx = ((ctrl_inl(FRQCR) >> 24) & 0x000f);
54 clk->rate = clk->parent->rate / ifc_divisors[idx];
57 static struct clk_ops sh7770_cpu_clk_ops = {
58 .recalc = cpu_clk_recalc,
61 static struct clk_ops *sh7770_clk_ops[] = {
62 &sh7770_master_clk_ops,
63 &sh7770_module_clk_ops,
68 void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
70 if (idx < ARRAY_SIZE(sh7770_clk_ops))
71 *ops = sh7770_clk_ops[idx];