1/*
 2 * arch/sh/kernel/cpu/sh3/clock-sh7709.c
 3 *
 4 * SH7709 support for the clock framework
 5 *
 6 *  Copyright (C) 2005  Andriy Skulysh
 7 *
 8 * Based on arch/sh/kernel/cpu/sh3/clock-sh7705.c
 9 *  Copyright (C) 2005  Paul Mundt
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, 8, 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 sh7709_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 sh7709_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 & 0x0080) ?
53		((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4) : 1;
54
55	return clk->parent->rate * stc_multipliers[idx];
56}
57
58static struct sh_clk_ops sh7709_bus_clk_ops = {
59	.recalc		= bus_clk_recalc,
60};
61
62static unsigned long cpu_clk_recalc(struct clk *clk)
63{
64	int frqcr = __raw_readw(FRQCR);
65	int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
66
67	return clk->parent->rate / ifc_divisors[idx];
68}
69
70static struct sh_clk_ops sh7709_cpu_clk_ops = {
71	.recalc		= cpu_clk_recalc,
72};
73
74static struct sh_clk_ops *sh7709_clk_ops[] = {
75	&sh7709_master_clk_ops,
76	&sh7709_module_clk_ops,
77	&sh7709_bus_clk_ops,
78	&sh7709_cpu_clk_ops,
79};
80
81void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
82{
83	if (idx < ARRAY_SIZE(sh7709_clk_ops))
84		*ops = sh7709_clk_ops[idx];
85}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * arch/sh/kernel/cpu/sh3/clock-sh7709.c
 4 *
 5 * SH7709 support for the clock framework
 6 *
 7 *  Copyright (C) 2005  Andriy Skulysh
 8 *
 9 * Based on arch/sh/kernel/cpu/sh3/clock-sh7705.c
10 *  Copyright (C) 2005  Paul Mundt
 
 
 
 
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, 8, 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 sh7709_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 sh7709_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 & 0x0080) ?
50		((frqcr & 0x8000) >> 13) | ((frqcr & 0x0030) >> 4) : 1;
51
52	return clk->parent->rate * stc_multipliers[idx];
53}
54
55static struct sh_clk_ops sh7709_bus_clk_ops = {
56	.recalc		= bus_clk_recalc,
57};
58
59static unsigned long cpu_clk_recalc(struct clk *clk)
60{
61	int frqcr = __raw_readw(FRQCR);
62	int idx = ((frqcr & 0x4000) >> 12) | ((frqcr & 0x000c) >> 2);
63
64	return clk->parent->rate / ifc_divisors[idx];
65}
66
67static struct sh_clk_ops sh7709_cpu_clk_ops = {
68	.recalc		= cpu_clk_recalc,
69};
70
71static struct sh_clk_ops *sh7709_clk_ops[] = {
72	&sh7709_master_clk_ops,
73	&sh7709_module_clk_ops,
74	&sh7709_bus_clk_ops,
75	&sh7709_cpu_clk_ops,
76};
77
78void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
79{
80	if (idx < ARRAY_SIZE(sh7709_clk_ops))
81		*ops = sh7709_clk_ops[idx];
82}