2 * arch/sh/kernel/cpu/sh4a/clock-sh7723.c
4 * SH7723 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/clk.h>
25 #include <linux/clkdev.h>
26 #include <asm/clock.h>
27 #include <asm/hwblk.h>
28 #include <cpu/sh7723.h>
30 /* SH7723 registers */
31 #define FRQCR 0xa4150000
32 #define VCLKCR 0xa4150004
33 #define SCLKACR 0xa4150008
34 #define SCLKBCR 0xa415000c
35 #define IRDACLKCR 0xa4150018
36 #define PLLCR 0xa4150024
37 #define DLLFRQ 0xa4150050
39 /* Fixed 32 KHz root clock for RTC and Power Management purposes */
40 static struct clk r_clk = {
45 * Default rate for the root input clock, reset this with clk_set_rate()
46 * from the platform code.
48 struct clk extal_clk = {
52 /* The dll multiplies the 32khz r_clk, may be used instead of extal */
53 static unsigned long dll_recalc(struct clk *clk)
57 if (__raw_readl(PLLCR) & 0x1000)
58 mult = __raw_readl(DLLFRQ);
62 return clk->parent->rate * mult;
65 static struct clk_ops dll_clk_ops = {
69 static struct clk dll_clk = {
72 .flags = CLK_ENABLE_ON_INIT,
75 static unsigned long pll_recalc(struct clk *clk)
77 unsigned long mult = 1;
78 unsigned long div = 1;
80 if (__raw_readl(PLLCR) & 0x4000)
81 mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
85 return (clk->parent->rate * mult) / div;
88 static struct clk_ops pll_clk_ops = {
92 static struct clk pll_clk = {
94 .flags = CLK_ENABLE_ON_INIT,
97 struct clk *main_clks[] = {
104 static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
105 static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
107 static struct clk_div_mult_table div4_div_mult_table = {
108 .divisors = divisors,
109 .nr_divisors = ARRAY_SIZE(divisors),
110 .multipliers = multipliers,
111 .nr_multipliers = ARRAY_SIZE(multipliers),
114 static struct clk_div4_table div4_table = {
115 .div_mult_table = &div4_div_mult_table,
118 enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, 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, 0x0dbf, CLK_ENABLE_ON_INIT),
125 [DIV4_U] = DIV4(FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT),
126 [DIV4_SH] = DIV4(FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT),
127 [DIV4_B] = DIV4(FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT),
128 [DIV4_B3] = DIV4(FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT),
129 [DIV4_P] = DIV4(FRQCR, 0, 0x0dbf, 0),
132 enum { DIV4_IRDA, DIV4_ENABLE_NR };
134 struct clk div4_enable_clks[DIV4_ENABLE_NR] = {
135 [DIV4_IRDA] = DIV4(IRDACLKCR, 0, 0x0dbf, 0),
138 enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR };
140 struct clk div4_reparent_clks[DIV4_REPARENT_NR] = {
141 [DIV4_SIUA] = DIV4(SCLKACR, 0, 0x0dbf, 0),
142 [DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x0dbf, 0),
144 enum { DIV6_V, DIV6_NR };
146 struct clk div6_clks[DIV6_NR] = {
147 [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0),
150 static struct clk mstp_clks[] = {
151 /* See page 60 of Datasheet V1.0: Overview -> Block Diagram */
152 SH_HWBLK_CLK(HWBLK_TLB, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT),
153 SH_HWBLK_CLK(HWBLK_IC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT),
154 SH_HWBLK_CLK(HWBLK_OC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT),
155 SH_HWBLK_CLK(HWBLK_L2C, &div4_clks[DIV4_SH], CLK_ENABLE_ON_INIT),
156 SH_HWBLK_CLK(HWBLK_ILMEM, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT),
157 SH_HWBLK_CLK(HWBLK_FPU, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT),
158 SH_HWBLK_CLK(HWBLK_INTC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT),
159 SH_HWBLK_CLK(HWBLK_DMAC0, &div4_clks[DIV4_B], 0),
160 SH_HWBLK_CLK(HWBLK_SHYWAY, &div4_clks[DIV4_SH], CLK_ENABLE_ON_INIT),
161 SH_HWBLK_CLK(HWBLK_HUDI, &div4_clks[DIV4_P], 0),
162 SH_HWBLK_CLK(HWBLK_UBC, &div4_clks[DIV4_I], 0),
163 SH_HWBLK_CLK(HWBLK_TMU0, &div4_clks[DIV4_P], 0),
164 SH_HWBLK_CLK(HWBLK_CMT, &r_clk, 0),
165 SH_HWBLK_CLK(HWBLK_RWDT, &r_clk, 0),
166 SH_HWBLK_CLK(HWBLK_DMAC1, &div4_clks[DIV4_B], 0),
167 SH_HWBLK_CLK(HWBLK_TMU1, &div4_clks[DIV4_P], 0),
168 SH_HWBLK_CLK(HWBLK_FLCTL, &div4_clks[DIV4_P], 0),
169 SH_HWBLK_CLK(HWBLK_SCIF0, &div4_clks[DIV4_P], 0),
170 SH_HWBLK_CLK(HWBLK_SCIF1, &div4_clks[DIV4_P], 0),
171 SH_HWBLK_CLK(HWBLK_SCIF2, &div4_clks[DIV4_P], 0),
172 SH_HWBLK_CLK(HWBLK_SCIF3, &div4_clks[DIV4_B], 0),
173 SH_HWBLK_CLK(HWBLK_SCIF4, &div4_clks[DIV4_B], 0),
174 SH_HWBLK_CLK(HWBLK_SCIF5, &div4_clks[DIV4_B], 0),
175 SH_HWBLK_CLK(HWBLK_MSIOF0, &div4_clks[DIV4_B], 0),
176 SH_HWBLK_CLK(HWBLK_MSIOF1, &div4_clks[DIV4_B], 0),
177 SH_HWBLK_CLK(HWBLK_MERAM, &div4_clks[DIV4_SH], 0),
179 SH_HWBLK_CLK(HWBLK_IIC, &div4_clks[DIV4_P], 0),
180 SH_HWBLK_CLK(HWBLK_RTC, &r_clk, 0),
182 SH_HWBLK_CLK(HWBLK_ATAPI, &div4_clks[DIV4_SH], 0),
183 SH_HWBLK_CLK(HWBLK_ADC, &div4_clks[DIV4_P], 0),
184 SH_HWBLK_CLK(HWBLK_TPU, &div4_clks[DIV4_B], 0),
185 SH_HWBLK_CLK(HWBLK_IRDA, &div4_clks[DIV4_P], 0),
186 SH_HWBLK_CLK(HWBLK_TSIF, &div4_clks[DIV4_B], 0),
187 SH_HWBLK_CLK(HWBLK_ICB, &div4_clks[DIV4_B], CLK_ENABLE_ON_INIT),
188 SH_HWBLK_CLK(HWBLK_SDHI0, &div4_clks[DIV4_B], 0),
189 SH_HWBLK_CLK(HWBLK_SDHI1, &div4_clks[DIV4_B], 0),
190 SH_HWBLK_CLK(HWBLK_KEYSC, &r_clk, 0),
191 SH_HWBLK_CLK(HWBLK_USB, &div4_clks[DIV4_B], 0),
192 SH_HWBLK_CLK(HWBLK_2DG, &div4_clks[DIV4_B], 0),
193 SH_HWBLK_CLK(HWBLK_SIU, &div4_clks[DIV4_B], 0),
194 SH_HWBLK_CLK(HWBLK_VEU2H1, &div4_clks[DIV4_B], 0),
195 SH_HWBLK_CLK(HWBLK_VOU, &div4_clks[DIV4_B], 0),
196 SH_HWBLK_CLK(HWBLK_BEU, &div4_clks[DIV4_B], 0),
197 SH_HWBLK_CLK(HWBLK_CEU, &div4_clks[DIV4_B], 0),
198 SH_HWBLK_CLK(HWBLK_VEU2H0, &div4_clks[DIV4_B], 0),
199 SH_HWBLK_CLK(HWBLK_VPU, &div4_clks[DIV4_B], 0),
200 SH_HWBLK_CLK(HWBLK_LCDC, &div4_clks[DIV4_B], 0),
203 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
204 #define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
206 static struct clk_lookup lookups[] = {
208 CLKDEV_CON_ID("rclk", &r_clk),
209 CLKDEV_CON_ID("extal", &extal_clk),
210 CLKDEV_CON_ID("dll_clk", &dll_clk),
211 CLKDEV_CON_ID("pll_clk", &pll_clk),
214 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
215 CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]),
216 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
217 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
218 CLKDEV_CON_ID("b3_clk", &div4_clks[DIV4_B3]),
219 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
220 CLKDEV_CON_ID("irda_clk", &div4_enable_clks[DIV4_IRDA]),
221 CLKDEV_CON_ID("siua_clk", &div4_reparent_clks[DIV4_SIUA]),
222 CLKDEV_CON_ID("siub_clk", &div4_reparent_clks[DIV4_SIUB]),
225 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
228 CLKDEV_CON_ID("tlb0", &mstp_clks[HWBLK_TLB]),
229 CLKDEV_CON_ID("ic0", &mstp_clks[HWBLK_IC]),
230 CLKDEV_CON_ID("oc0", &mstp_clks[HWBLK_OC]),
231 CLKDEV_CON_ID("l2c0", &mstp_clks[HWBLK_L2C]),
232 CLKDEV_CON_ID("ilmem0", &mstp_clks[HWBLK_ILMEM]),
233 CLKDEV_CON_ID("fpu0", &mstp_clks[HWBLK_FPU]),
234 CLKDEV_CON_ID("intc0", &mstp_clks[HWBLK_INTC]),
235 CLKDEV_CON_ID("dmac0", &mstp_clks[HWBLK_DMAC0]),
236 CLKDEV_CON_ID("sh0", &mstp_clks[HWBLK_SHYWAY]),
237 CLKDEV_CON_ID("hudi0", &mstp_clks[HWBLK_HUDI]),
238 CLKDEV_CON_ID("ubc0", &mstp_clks[HWBLK_UBC]),
241 .dev_id = "sh_tmu.0",
243 .clk = &mstp_clks[HWBLK_TMU0],
246 .dev_id = "sh_tmu.1",
248 .clk = &mstp_clks[HWBLK_TMU0],
251 .dev_id = "sh_tmu.2",
253 .clk = &mstp_clks[HWBLK_TMU0],
255 CLKDEV_CON_ID("cmt_fck", &mstp_clks[HWBLK_CMT]),
256 CLKDEV_CON_ID("rwdt0", &mstp_clks[HWBLK_RWDT]),
257 CLKDEV_CON_ID("dmac1", &mstp_clks[HWBLK_DMAC1]),
260 .dev_id = "sh_tmu.3",
262 .clk = &mstp_clks[HWBLK_TMU1],
265 .dev_id = "sh_tmu.4",
267 .clk = &mstp_clks[HWBLK_TMU1],
270 .dev_id = "sh_tmu.5",
272 .clk = &mstp_clks[HWBLK_TMU1],
274 CLKDEV_CON_ID("flctl0", &mstp_clks[HWBLK_FLCTL]),
277 .dev_id = "sh-sci.0",
279 .clk = &mstp_clks[HWBLK_SCIF0],
282 .dev_id = "sh-sci.1",
284 .clk = &mstp_clks[HWBLK_SCIF1],
287 .dev_id = "sh-sci.2",
289 .clk = &mstp_clks[HWBLK_SCIF2],
292 .dev_id = "sh-sci.3",
294 .clk = &mstp_clks[HWBLK_SCIF3],
297 .dev_id = "sh-sci.4",
299 .clk = &mstp_clks[HWBLK_SCIF4],
302 .dev_id = "sh-sci.5",
304 .clk = &mstp_clks[HWBLK_SCIF5],
306 CLKDEV_CON_ID("msiof0", &mstp_clks[HWBLK_MSIOF0]),
307 CLKDEV_CON_ID("msiof1", &mstp_clks[HWBLK_MSIOF1]),
308 CLKDEV_CON_ID("meram0", &mstp_clks[HWBLK_MERAM]),
309 CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[HWBLK_IIC]),
310 CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]),
311 CLKDEV_CON_ID("atapi0", &mstp_clks[HWBLK_ATAPI]),
312 CLKDEV_CON_ID("adc0", &mstp_clks[HWBLK_ADC]),
313 CLKDEV_CON_ID("tpu0", &mstp_clks[HWBLK_TPU]),
314 CLKDEV_CON_ID("irda0", &mstp_clks[HWBLK_IRDA]),
315 CLKDEV_CON_ID("tsif0", &mstp_clks[HWBLK_TSIF]),
316 CLKDEV_CON_ID("icb0", &mstp_clks[HWBLK_ICB]),
317 CLKDEV_CON_ID("sdhi0", &mstp_clks[HWBLK_SDHI0]),
318 CLKDEV_CON_ID("sdhi1", &mstp_clks[HWBLK_SDHI1]),
319 CLKDEV_CON_ID("keysc0", &mstp_clks[HWBLK_KEYSC]),
320 CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB]),
321 CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]),
322 CLKDEV_CON_ID("siu0", &mstp_clks[HWBLK_SIU]),
323 CLKDEV_CON_ID("veu1", &mstp_clks[HWBLK_VEU2H1]),
324 CLKDEV_CON_ID("vou0", &mstp_clks[HWBLK_VOU]),
325 CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU]),
326 CLKDEV_CON_ID("ceu0", &mstp_clks[HWBLK_CEU]),
327 CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU2H0]),
328 CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]),
329 CLKDEV_CON_ID("lcdc0", &mstp_clks[HWBLK_LCDC]),
332 int __init arch_clk_init(void)
336 /* autodetect extal or dll configuration */
337 if (__raw_readl(PLLCR) & 0x1000)
338 pll_clk.parent = &dll_clk;
340 pll_clk.parent = &extal_clk;
342 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
343 ret |= clk_register(main_clks[k]);
345 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
348 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
351 ret = sh_clk_div4_enable_register(div4_enable_clks,
352 DIV4_ENABLE_NR, &div4_table);
355 ret = sh_clk_div4_reparent_register(div4_reparent_clks,
356 DIV4_REPARENT_NR, &div4_table);
359 ret = sh_clk_div6_register(div6_clks, DIV6_NR);
362 ret = sh_hwblk_clk_register(mstp_clks, HWBLK_NR);