1/*
 2 * arch/sh/kernel/cpu/sh3/clock-sh7706.c
 3 *
 4 * SH7706 support for the clock framework
 5 *
 6 *  Copyright (C) 2006  Takashi YOSHII
 7 *
 8 * Based on arch/sh/kernel/cpu/sh3/clock-sh7709.c
 9 *  Copyright (C) 2005  Andriy Skulysh
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License.  See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <asm/clock.h>
18#include <asm/freq.h>
19#include <asm/io.h>
20
21static int stc_multipliers[] = { 1, 2, 4, 1, 3, 6, 1, 1 };
22static int ifc_divisors[]    = { 1, 2, 4, 1, 3, 1, 1, 1 };
23static int pfc_divisors[]    = { 1, 2, 4, 1, 3, 6, 1, 1 };
24
25static void master_clk_init(struct clk *clk)
26{
27	int frqcr = __raw_readw(FRQCR);
28	int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
29
30	clk->rate *= pfc_divisors[idx];
31}
32
33static struct sh_clk_ops sh7706_master_clk_ops = {
34	.init		= master_clk_init,
35};
36
37static unsigned long module_clk_recalc(struct clk *clk)
38{
39	int frqcr = __raw_readw(FRQCR);
40	int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
41
42	return clk->parent->rate / pfc_divisors[idx];
43}
44
45static struct sh_clk_ops sh7706_module_clk_ops = {
46	.recalc		= module_clk_recalc,
47};
48
49static unsigned long bus_clk_recalc(struct clk *clk)
50{
51	int frqcr = __raw_readw(FRQCR);
52	int idx = ((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4);
53
54	return clk->parent->rate / stc_multipliers[idx];
55}
56
57static struct sh_clk_ops sh7706_bus_clk_ops = {
58	.recalc		= bus_clk_recalc,
59};
60
61static unsigned long cpu_clk_recalc(struct clk *clk)
62{
63	int frqcr = __raw_readw(FRQCR);
64	int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
65
66	return clk->parent->rate / ifc_divisors[idx];
67}
68
69static struct sh_clk_ops sh7706_cpu_clk_ops = {
70	.recalc		= cpu_clk_recalc,
71};
72
73static struct sh_clk_ops *sh7706_clk_ops[] = {
74	&sh7706_master_clk_ops,
75	&sh7706_module_clk_ops,
76	&sh7706_bus_clk_ops,
77	&sh7706_cpu_clk_ops,
78};
79
80void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
81{
82	if (idx < ARRAY_SIZE(sh7706_clk_ops))
83		*ops = sh7706_clk_ops[idx];
84}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * arch/sh/kernel/cpu/sh3/clock-sh7706.c
 4 *
 5 * SH7706 support for the clock framework
 6 *
 7 *  Copyright (C) 2006  Takashi YOSHII
 8 *
 9 * Based on arch/sh/kernel/cpu/sh3/clock-sh7709.c
10 *  Copyright (C) 2005  Andriy Skulysh
11 */
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <asm/clock.h>
15#include <asm/freq.h>
16#include <asm/io.h>
17
18static int stc_multipliers[] = { 1, 2, 4, 1, 3, 6, 1, 1 };
19static int ifc_divisors[]    = { 1, 2, 4, 1, 3, 1, 1, 1 };
20static int pfc_divisors[]    = { 1, 2, 4, 1, 3, 6, 1, 1 };
21
22static void master_clk_init(struct clk *clk)
23{
24	int frqcr = __raw_readw(FRQCR);
25	int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
26
27	clk->rate *= pfc_divisors[idx];
28}
29
30static struct sh_clk_ops sh7706_master_clk_ops = {
31	.init		= master_clk_init,
32};
33
34static unsigned long module_clk_recalc(struct clk *clk)
35{
36	int frqcr = __raw_readw(FRQCR);
37	int idx = ((frqcr & 0x2000) >> 11) | (frqcr & 0x0003);
38
39	return clk->parent->rate / pfc_divisors[idx];
40}
41
42static struct sh_clk_ops sh7706_module_clk_ops = {
43	.recalc		= module_clk_recalc,
44};
45
46static unsigned long bus_clk_recalc(struct clk *clk)
47{
48	int frqcr = __raw_readw(FRQCR);
49	int idx = ((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4);
50
51	return clk->parent->rate / stc_multipliers[idx];
52}
53
54static struct sh_clk_ops sh7706_bus_clk_ops = {
55	.recalc		= bus_clk_recalc,
56};
57
58static unsigned long cpu_clk_recalc(struct clk *clk)
59{
60	int frqcr = __raw_readw(FRQCR);
61	int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
62
63	return clk->parent->rate / ifc_divisors[idx];
64}
65
66static struct sh_clk_ops sh7706_cpu_clk_ops = {
67	.recalc		= cpu_clk_recalc,
68};
69
70static struct sh_clk_ops *sh7706_clk_ops[] = {
71	&sh7706_master_clk_ops,
72	&sh7706_module_clk_ops,
73	&sh7706_bus_clk_ops,
74	&sh7706_cpu_clk_ops,
75};
76
77void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
78{
79	if (idx < ARRAY_SIZE(sh7706_clk_ops))
80		*ops = sh7706_clk_ops[idx];
81}