2 * arch/sh/kernel/cpu/sh5/clock-sh5.c
4 * SH-5 support for the clock framework
6 * Copyright (C) 2008 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>
17 static int ifc_table[] = { 2, 4, 6, 8, 10, 12, 16, 24 };
19 /* Clock, Power and Reset Controller */
20 #define CPRC_BLOCK_OFF 0x01010000
21 #define CPRC_BASE (PHYS_PERIPHERAL_BLOCK + CPRC_BLOCK_OFF)
23 static unsigned long cprc_base;
25 static void master_clk_init(struct clk *clk)
27 int idx = (ctrl_inl(cprc_base + 0x00) >> 6) & 0x0007;
28 clk->rate *= ifc_table[idx];
31 static struct clk_ops sh5_master_clk_ops = {
32 .init = master_clk_init,
35 static unsigned long module_clk_recalc(struct clk *clk)
37 int idx = (ctrl_inw(cprc_base) >> 12) & 0x0007;
38 return clk->parent->rate / ifc_table[idx];
41 static struct clk_ops sh5_module_clk_ops = {
42 .recalc = module_clk_recalc,
45 static unsigned long bus_clk_recalc(struct clk *clk)
47 int idx = (ctrl_inw(cprc_base) >> 3) & 0x0007;
48 return clk->parent->rate / ifc_table[idx];
51 static struct clk_ops sh5_bus_clk_ops = {
52 .recalc = bus_clk_recalc,
55 static unsigned long cpu_clk_recalc(struct clk *clk)
57 int idx = (ctrl_inw(cprc_base) & 0x0007);
58 return clk->parent->rate / ifc_table[idx];
61 static struct clk_ops sh5_cpu_clk_ops = {
62 .recalc = cpu_clk_recalc,
65 static struct clk_ops *sh5_clk_ops[] = {
72 void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
74 cprc_base = (unsigned long)ioremap_nocache(CPRC_BASE, 1024);
77 if (idx < ARRAY_SIZE(sh5_clk_ops))
78 *ops = sh5_clk_ops[idx];