2 * arch/sh/kernel/cpu/sh4a/clock-sh7722.c
4 * SH7722 clock framework support
6 * Copyright (C) 2009 Magnus Damm
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/init.h>
22 #include <linux/kernel.h>
24 #include <asm/clock.h>
26 /* SH7722 registers */
27 #define FRQCR 0xa4150000
28 #define VCLKCR 0xa4150004
29 #define SCLKACR 0xa4150008
30 #define SCLKBCR 0xa415000c
31 #define IRDACLKCR 0xa4150018
32 #define PLLCR 0xa4150024
33 #define MSTPCR0 0xa4150030
34 #define MSTPCR1 0xa4150034
35 #define MSTPCR2 0xa4150038
36 #define DLLFRQ 0xa4150050
38 /* Fixed 32 KHz root clock for RTC and Power Management purposes */
39 static struct clk r_clk = {
46 * Default rate for the root input clock, reset this with clk_set_rate()
47 * from the platform code.
49 struct clk extal_clk = {
55 /* The dll block multiplies the 32khz r_clk, may be used instead of extal */
56 static unsigned long dll_recalc(struct clk *clk)
60 if (__raw_readl(PLLCR) & 0x1000)
61 mult = __raw_readl(DLLFRQ);
65 return clk->parent->rate * mult;
68 static struct clk_ops dll_clk_ops = {
72 static struct clk dll_clk = {
77 .flags = CLK_ENABLE_ON_INIT,
80 static unsigned long pll_recalc(struct clk *clk)
82 unsigned long mult = 1;
83 unsigned long div = 1;
85 if (__raw_readl(PLLCR) & 0x4000)
86 mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
90 return (clk->parent->rate * mult) / div;
93 static struct clk_ops pll_clk_ops = {
97 static struct clk pll_clk = {
101 .flags = CLK_ENABLE_ON_INIT,
104 struct clk *main_clks[] = {
111 static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
112 static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
114 static struct clk_div_mult_table div4_table = {
115 .divisors = divisors,
116 .nr_divisors = ARRAY_SIZE(divisors),
117 .multipliers = multipliers,
118 .nr_multipliers = ARRAY_SIZE(multipliers),
121 enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P,
122 DIV4_SIUA, DIV4_SIUB, DIV4_IRDA, DIV4_NR };
124 #define DIV4(_str, _reg, _bit, _mask, _flags) \
125 SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
127 struct clk div4_clks[DIV4_NR] = {
128 [DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT),
129 [DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT),
130 [DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT),
131 [DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT),
132 [DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT),
133 [DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x1fff, 0),
134 [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x1fff, 0),
135 [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x1fff, 0),
136 [DIV4_IRDA] = DIV4("irda_clk", IRDACLKCR, 0, 0x1fff, 0),
139 struct clk div6_clks[] = {
140 SH_CLK_DIV6("video_clk", &pll_clk, VCLKCR, 0),
143 #define MSTP(_str, _parent, _reg, _bit, _flags) \
144 SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _flags)
146 static struct clk mstp_clks[] = {
147 MSTP("uram0", &div4_clks[DIV4_U], MSTPCR0, 28, CLK_ENABLE_ON_INIT),
148 MSTP("xymem0", &div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT),
149 MSTP("tmu0", &div4_clks[DIV4_P], MSTPCR0, 15, 0),
150 MSTP("cmt0", &r_clk, MSTPCR0, 14, 0),
151 MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0),
152 MSTP("flctl0", &div4_clks[DIV4_P], MSTPCR0, 10, 0),
153 MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 7, 0),
154 MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 6, 0),
155 MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 5, 0),
157 MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0),
158 MSTP("rtc0", &r_clk, MSTPCR1, 8, 0),
160 MSTP("sdhi0", &div4_clks[DIV4_P], MSTPCR2, 18, 0),
161 MSTP("keysc0", &r_clk, MSTPCR2, 14, 0),
162 MSTP("usbf0", &div4_clks[DIV4_P], MSTPCR2, 11, 0),
163 MSTP("2dg0", &div4_clks[DIV4_B], MSTPCR2, 9, 0),
164 MSTP("siu0", &div4_clks[DIV4_B], MSTPCR2, 8, 0),
165 MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0),
166 MSTP("jpu0", &div4_clks[DIV4_B], MSTPCR2, 6, CLK_ENABLE_ON_INIT),
167 MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0),
168 MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0),
169 MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT),
170 MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT),
171 MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0),
174 int __init arch_clk_init(void)
178 /* autodetect extal or dll configuration */
179 if (__raw_readl(PLLCR) & 0x1000)
180 pll_clk.parent = &dll_clk;
182 pll_clk.parent = &extal_clk;
184 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
185 ret = clk_register(main_clks[k]);
188 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
191 ret = sh_clk_div6_register(div6_clks, ARRAY_SIZE(div6_clks));
194 ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks));