2 * arch/sh/kernel/cpu/sh4a/clock-sh7366.c
4 * SH7366 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 <linux/clkdev.h>
25 #include <asm/clock.h>
27 /* SH7366 registers */
28 #define FRQCR 0xa4150000
29 #define VCLKCR 0xa4150004
30 #define SCLKACR 0xa4150008
31 #define SCLKBCR 0xa415000c
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 = {
44 * Default rate for the root input clock, reset this with clk_set_rate()
45 * from the platform code.
47 struct clk extal_clk = {
51 /* The dll block multiplies the 32khz r_clk, may be used instead of extal */
52 static unsigned long dll_recalc(struct clk *clk)
56 if (__raw_readl(PLLCR) & 0x1000)
57 mult = __raw_readl(DLLFRQ);
61 return clk->parent->rate * mult;
64 static struct sh_clk_ops dll_clk_ops = {
68 static struct clk dll_clk = {
71 .flags = CLK_ENABLE_ON_INIT,
74 static unsigned long pll_recalc(struct clk *clk)
76 unsigned long mult = 1;
77 unsigned long div = 1;
79 if (__raw_readl(PLLCR) & 0x4000)
80 mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
84 return (clk->parent->rate * mult) / div;
87 static struct sh_clk_ops pll_clk_ops = {
91 static struct clk pll_clk = {
93 .flags = CLK_ENABLE_ON_INIT,
96 struct clk *main_clks[] = {
103 static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
104 static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
106 static struct clk_div_mult_table div4_div_mult_table = {
107 .divisors = divisors,
108 .nr_divisors = ARRAY_SIZE(divisors),
109 .multipliers = multipliers,
110 .nr_multipliers = ARRAY_SIZE(multipliers),
113 static struct clk_div4_table div4_table = {
114 .div_mult_table = &div4_div_mult_table,
117 enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P,
118 DIV4_SIUA, DIV4_SIUB, DIV4_NR };
120 #define DIV4(_reg, _bit, _mask, _flags) \
121 SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
123 struct clk div4_clks[DIV4_NR] = {
124 [DIV4_I] = DIV4(FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT),
125 [DIV4_U] = DIV4(FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT),
126 [DIV4_SH] = DIV4(FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT),
127 [DIV4_B] = DIV4(FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT),
128 [DIV4_B3] = DIV4(FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT),
129 [DIV4_P] = DIV4(FRQCR, 0, 0x1fff, 0),
130 [DIV4_SIUA] = DIV4(SCLKACR, 0, 0x1fff, 0),
131 [DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x1fff, 0),
134 enum { DIV6_V, DIV6_NR };
136 struct clk div6_clks[DIV6_NR] = {
137 [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0),
140 #define MSTP(_parent, _reg, _bit, _flags) \
141 SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
143 enum { MSTP031, MSTP030, MSTP029, MSTP028, MSTP026,
144 MSTP023, MSTP022, MSTP021, MSTP020, MSTP019, MSTP018, MSTP017, MSTP016,
145 MSTP015, MSTP014, MSTP013, MSTP012, MSTP011, MSTP010,
146 MSTP007, MSTP006, MSTP005, MSTP002, MSTP001,
148 MSTP227, MSTP226, MSTP224, MSTP223, MSTP222, MSTP218, MSTP217,
149 MSTP211, MSTP207, MSTP205, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
152 static struct clk mstp_clks[MSTP_NR] = {
153 /* See page 52 of Datasheet V0.40: Overview -> Block Diagram */
154 [MSTP031] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT),
155 [MSTP030] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT),
156 [MSTP029] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT),
157 [MSTP028] = MSTP(&div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT),
158 [MSTP026] = MSTP(&div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT),
159 [MSTP023] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 23, 0),
160 [MSTP022] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 22, 0),
161 [MSTP021] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 21, 0),
162 [MSTP020] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 20, 0),
163 [MSTP019] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 19, 0),
164 [MSTP017] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 17, 0),
165 [MSTP015] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 15, 0),
166 [MSTP014] = MSTP(&r_clk, MSTPCR0, 14, 0),
167 [MSTP013] = MSTP(&r_clk, MSTPCR0, 13, 0),
168 [MSTP011] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 11, 0),
169 [MSTP010] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 10, 0),
170 [MSTP007] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 7, 0),
171 [MSTP006] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 6, 0),
172 [MSTP005] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 5, 0),
173 [MSTP002] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 2, 0),
174 [MSTP001] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 1, 0),
176 [MSTP109] = MSTP(&div4_clks[DIV4_P], MSTPCR1, 9, 0),
178 [MSTP227] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 27, 0),
179 [MSTP226] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 26, 0),
180 [MSTP224] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 24, 0),
181 [MSTP223] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 23, 0),
182 [MSTP222] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 22, 0),
183 [MSTP218] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 18, 0),
184 [MSTP217] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 17, 0),
185 [MSTP211] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 11, 0),
186 [MSTP207] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 7, CLK_ENABLE_ON_INIT),
187 [MSTP205] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 5, 0),
188 [MSTP204] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 4, 0),
189 [MSTP203] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 3, 0),
190 [MSTP202] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT),
191 [MSTP201] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT),
192 [MSTP200] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 0, 0),
195 static struct clk_lookup lookups[] = {
197 CLKDEV_CON_ID("rclk", &r_clk),
198 CLKDEV_CON_ID("extal", &extal_clk),
199 CLKDEV_CON_ID("dll_clk", &dll_clk),
200 CLKDEV_CON_ID("pll_clk", &pll_clk),
203 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
204 CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]),
205 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
206 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
207 CLKDEV_CON_ID("b3_clk", &div4_clks[DIV4_B3]),
208 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
209 CLKDEV_CON_ID("siua_clk", &div4_clks[DIV4_SIUA]),
210 CLKDEV_CON_ID("siub_clk", &div4_clks[DIV4_SIUB]),
213 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
216 CLKDEV_CON_ID("tlb0", &mstp_clks[MSTP031]),
217 CLKDEV_CON_ID("ic0", &mstp_clks[MSTP030]),
218 CLKDEV_CON_ID("oc0", &mstp_clks[MSTP029]),
219 CLKDEV_CON_ID("rsmem0", &mstp_clks[MSTP028]),
220 CLKDEV_CON_ID("xymem0", &mstp_clks[MSTP026]),
221 CLKDEV_CON_ID("intc3", &mstp_clks[MSTP023]),
222 CLKDEV_CON_ID("intc0", &mstp_clks[MSTP022]),
223 CLKDEV_CON_ID("dmac0", &mstp_clks[MSTP021]),
224 CLKDEV_CON_ID("sh0", &mstp_clks[MSTP020]),
225 CLKDEV_CON_ID("hudi0", &mstp_clks[MSTP019]),
226 CLKDEV_CON_ID("ubc0", &mstp_clks[MSTP017]),
227 CLKDEV_CON_ID("tmu_fck", &mstp_clks[MSTP015]),
228 CLKDEV_CON_ID("cmt_fck", &mstp_clks[MSTP014]),
229 CLKDEV_CON_ID("rwdt0", &mstp_clks[MSTP013]),
230 CLKDEV_CON_ID("mfi0", &mstp_clks[MSTP011]),
231 CLKDEV_CON_ID("flctl0", &mstp_clks[MSTP010]),
233 CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP007]),
234 CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP006]),
235 CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP005]),
237 CLKDEV_CON_ID("msiof0", &mstp_clks[MSTP002]),
238 CLKDEV_CON_ID("sbr0", &mstp_clks[MSTP001]),
239 CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP109]),
240 CLKDEV_CON_ID("icb0", &mstp_clks[MSTP227]),
241 CLKDEV_CON_ID("meram0", &mstp_clks[MSTP226]),
242 CLKDEV_CON_ID("dacy1", &mstp_clks[MSTP224]),
243 CLKDEV_CON_ID("dacy0", &mstp_clks[MSTP223]),
244 CLKDEV_CON_ID("tsif0", &mstp_clks[MSTP222]),
245 CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP218]),
246 CLKDEV_CON_ID("mmcif0", &mstp_clks[MSTP217]),
247 CLKDEV_CON_ID("usbf0", &mstp_clks[MSTP211]),
248 CLKDEV_CON_ID("veu1", &mstp_clks[MSTP207]),
249 CLKDEV_CON_ID("vou0", &mstp_clks[MSTP205]),
250 CLKDEV_CON_ID("beu0", &mstp_clks[MSTP204]),
251 CLKDEV_CON_ID("ceu0", &mstp_clks[MSTP203]),
252 CLKDEV_CON_ID("veu0", &mstp_clks[MSTP202]),
253 CLKDEV_CON_ID("vpu0", &mstp_clks[MSTP201]),
254 CLKDEV_CON_ID("lcdc0", &mstp_clks[MSTP200]),
257 int __init arch_clk_init(void)
261 /* autodetect extal or dll configuration */
262 if (__raw_readl(PLLCR) & 0x1000)
263 pll_clk.parent = &dll_clk;
265 pll_clk.parent = &extal_clk;
267 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
268 ret = clk_register(main_clks[k]);
270 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
273 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
276 ret = sh_clk_div6_register(div6_clks, DIV6_NR);
279 ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);