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
80
81
|
/*
* arch/sh/kernel/cpu/sh2a/clock-sh7203.c
*
* SH7203 support for the clock framework
*
* Copyright (C) 2007 Kieran Bingham (MPC-Data Ltd)
*
* Based on clock-sh7263.c
* Copyright (C) 2006 Yoshinori Sato
*
* Based on clock-sh4.c
* Copyright (C) 2005 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/freq.h>
#include <asm/io.h>
static const int pll1rate[]={8,12,16,0};
static const int pfc_divisors[]={1,2,3,4,6,8,12};
#define ifc_divisors pfc_divisors
static unsigned int pll2_mult;
static void master_clk_init(struct clk *clk)
{
clk->rate *= pll1rate[(__raw_readw(FREQCR) >> 8) & 0x0003] * pll2_mult;
}
static struct clk_ops sh7203_master_clk_ops = {
.init = master_clk_init,
};
static unsigned long module_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FREQCR) & 0x0007);
return clk->parent->rate / pfc_divisors[idx];
}
static struct clk_ops sh7203_module_clk_ops = {
.recalc = module_clk_recalc,
};
static unsigned long bus_clk_recalc(struct clk *clk)
{
int idx = (__raw_readw(FREQCR) & 0x0007);
return clk->parent->rate / pfc_divisors[idx-2];
}
static struct clk_ops sh7203_bus_clk_ops = {
.recalc = bus_clk_recalc,
};
static struct clk_ops sh7203_cpu_clk_ops = {
.recalc = followparent_recalc,
};
static struct clk_ops *sh7203_clk_ops[] = {
&sh7203_master_clk_ops,
&sh7203_module_clk_ops,
&sh7203_bus_clk_ops,
&sh7203_cpu_clk_ops,
};
void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
{
if (test_mode_pin(MODE_PIN1))
pll2_mult = 4;
else if (test_mode_pin(MODE_PIN0))
pll2_mult = 2;
else
pll2_mult = 1;
if (idx < ARRAY_SIZE(sh7203_clk_ops))
*ops = sh7203_clk_ops[idx];
}
|
