1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* arch/sh/kernel/cpu/sh5/clock-sh5.c
*
* SH-5 support for the clock framework
*
* Copyright (C) 2008 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <asm/clock.h>
#include <asm/io.h>
static int ifc_table[] = { 2, 4, 6, 8, 10, 12, 16, 24 };
/* Clock, Power and Reset Controller */
#define CPRC_BLOCK_OFF 0x01010000
#define CPRC_BASE (PHYS_PERIPHERAL_BLOCK + CPRC_BLOCK_OFF)
static unsigned long cprc_base;
static void master_clk_init(struct clk *clk)
{
int idx = (ctrl_inl(cprc_base + 0x00) >> 6) & 0x0007;
clk->rate *= ifc_table[idx];
}
static struct clk_ops sh5_master_clk_ops = {
.init = master_clk_init,
};
static void module_clk_recalc(struct clk *clk)
{
int idx = (ctrl_inw(cprc_base) >> 12) & 0x0007;
clk->rate = clk->parent->rate / ifc_table[idx];
}
static struct clk_ops sh5_module_clk_ops = {
.recalc = module_clk_recalc,
};
static void bus_clk_recalc(struct clk *clk)
{
int idx = (ctrl_inw(cprc_base) >> 3) & 0x0007;
clk->rate = clk->parent->rate / ifc_table[idx];
}
static struct clk_ops sh5_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static void cpu_clk_recalc(struct clk *clk)
{
int idx = (ctrl_inw(cprc_base) & 0x0007);
clk->rate = clk->parent->rate / ifc_table[idx];
}
static struct clk_ops sh5_cpu_clk_ops = {
.recalc = cpu_clk_recalc,
};
static struct clk_ops *sh5_clk_ops[] = {
&sh5_master_clk_ops,
&sh5_module_clk_ops,
&sh5_bus_clk_ops,
&sh5_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
{
cprc_base = (unsigned long)ioremap_nocache(CPRC_BASE, 1024);
BUG_ON(!cprc_base);
if (idx < ARRAY_SIZE(sh5_clk_ops))
*ops = sh5_clk_ops[idx];
}
|
