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-rw-r--r--arch/arm/mach-s5pv210/clock.c454
1 files changed, 454 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
new file mode 100644
index 000000000000..ccccae262351
--- /dev/null
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -0,0 +1,454 @@
1/* linux/arch/arm/mach-s5pv210/clock.c
2 *
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com/
5 *
6 * S5PV210 - Clock support
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11*/
12
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/list.h>
17#include <linux/errno.h>
18#include <linux/err.h>
19#include <linux/clk.h>
20#include <linux/sysdev.h>
21#include <linux/io.h>
22
23#include <mach/map.h>
24
25#include <plat/cpu-freq.h>
26#include <mach/regs-clock.h>
27#include <plat/clock.h>
28#include <plat/cpu.h>
29#include <plat/pll.h>
30#include <plat/s5p-clock.h>
31#include <plat/clock-clksrc.h>
32#include <plat/s5pv210.h>
33
34static int s5pv210_clk_ip0_ctrl(struct clk *clk, int enable)
35{
36 return s5p_gatectrl(S5P_CLKGATE_IP0, clk, enable);
37}
38
39static int s5pv210_clk_ip1_ctrl(struct clk *clk, int enable)
40{
41 return s5p_gatectrl(S5P_CLKGATE_IP1, clk, enable);
42}
43
44static int s5pv210_clk_ip2_ctrl(struct clk *clk, int enable)
45{
46 return s5p_gatectrl(S5P_CLKGATE_IP2, clk, enable);
47}
48
49static int s5pv210_clk_ip3_ctrl(struct clk *clk, int enable)
50{
51 return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
52}
53
54static struct clk clk_h200 = {
55 .name = "hclk200",
56 .id = -1,
57};
58
59static struct clk clk_h100 = {
60 .name = "hclk100",
61 .id = -1,
62};
63
64static struct clk clk_h166 = {
65 .name = "hclk166",
66 .id = -1,
67};
68
69static struct clk clk_h133 = {
70 .name = "hclk133",
71 .id = -1,
72};
73
74static struct clk clk_p100 = {
75 .name = "pclk100",
76 .id = -1,
77};
78
79static struct clk clk_p83 = {
80 .name = "pclk83",
81 .id = -1,
82};
83
84static struct clk clk_p66 = {
85 .name = "pclk66",
86 .id = -1,
87};
88
89static struct clk *sys_clks[] = {
90 &clk_h200,
91 &clk_h100,
92 &clk_h166,
93 &clk_h133,
94 &clk_p100,
95 &clk_p83,
96 &clk_p66
97};
98
99static struct clk init_clocks_disable[] = {
100 {
101 .name = "rot",
102 .id = -1,
103 .parent = &clk_h166,
104 .enable = s5pv210_clk_ip0_ctrl,
105 .ctrlbit = (1<<29),
106 }, {
107 .name = "otg",
108 .id = -1,
109 .parent = &clk_h133,
110 .enable = s5pv210_clk_ip1_ctrl,
111 .ctrlbit = (1<<16),
112 }, {
113 .name = "usb-host",
114 .id = -1,
115 .parent = &clk_h133,
116 .enable = s5pv210_clk_ip1_ctrl,
117 .ctrlbit = (1<<17),
118 }, {
119 .name = "lcd",
120 .id = -1,
121 .parent = &clk_h166,
122 .enable = s5pv210_clk_ip1_ctrl,
123 .ctrlbit = (1<<0),
124 }, {
125 .name = "cfcon",
126 .id = 0,
127 .parent = &clk_h133,
128 .enable = s5pv210_clk_ip1_ctrl,
129 .ctrlbit = (1<<25),
130 }, {
131 .name = "hsmmc",
132 .id = 0,
133 .parent = &clk_h133,
134 .enable = s5pv210_clk_ip2_ctrl,
135 .ctrlbit = (1<<16),
136 }, {
137 .name = "hsmmc",
138 .id = 1,
139 .parent = &clk_h133,
140 .enable = s5pv210_clk_ip2_ctrl,
141 .ctrlbit = (1<<17),
142 }, {
143 .name = "hsmmc",
144 .id = 2,
145 .parent = &clk_h133,
146 .enable = s5pv210_clk_ip2_ctrl,
147 .ctrlbit = (1<<18),
148 }, {
149 .name = "hsmmc",
150 .id = 3,
151 .parent = &clk_h133,
152 .enable = s5pv210_clk_ip2_ctrl,
153 .ctrlbit = (1<<19),
154 }, {
155 .name = "systimer",
156 .id = -1,
157 .parent = &clk_p66,
158 .enable = s5pv210_clk_ip3_ctrl,
159 .ctrlbit = (1<<16),
160 }, {
161 .name = "watchdog",
162 .id = -1,
163 .parent = &clk_p66,
164 .enable = s5pv210_clk_ip3_ctrl,
165 .ctrlbit = (1<<22),
166 }, {
167 .name = "rtc",
168 .id = -1,
169 .parent = &clk_p66,
170 .enable = s5pv210_clk_ip3_ctrl,
171 .ctrlbit = (1<<15),
172 }, {
173 .name = "i2c",
174 .id = 0,
175 .parent = &clk_p66,
176 .enable = s5pv210_clk_ip3_ctrl,
177 .ctrlbit = (1<<7),
178 }, {
179 .name = "i2c",
180 .id = 1,
181 .parent = &clk_p66,
182 .enable = s5pv210_clk_ip3_ctrl,
183 .ctrlbit = (1<<8),
184 }, {
185 .name = "i2c",
186 .id = 2,
187 .parent = &clk_p66,
188 .enable = s5pv210_clk_ip3_ctrl,
189 .ctrlbit = (1<<9),
190 }, {
191 .name = "spi",
192 .id = 0,
193 .parent = &clk_p66,
194 .enable = s5pv210_clk_ip3_ctrl,
195 .ctrlbit = (1<<12),
196 }, {
197 .name = "spi",
198 .id = 1,
199 .parent = &clk_p66,
200 .enable = s5pv210_clk_ip3_ctrl,
201 .ctrlbit = (1<<13),
202 }, {
203 .name = "spi",
204 .id = 2,
205 .parent = &clk_p66,
206 .enable = s5pv210_clk_ip3_ctrl,
207 .ctrlbit = (1<<14),
208 }, {
209 .name = "timers",
210 .id = -1,
211 .parent = &clk_p66,
212 .enable = s5pv210_clk_ip3_ctrl,
213 .ctrlbit = (1<<23),
214 }, {
215 .name = "adc",
216 .id = -1,
217 .parent = &clk_p66,
218 .enable = s5pv210_clk_ip3_ctrl,
219 .ctrlbit = (1<<24),
220 }, {
221 .name = "keypad",
222 .id = -1,
223 .parent = &clk_p66,
224 .enable = s5pv210_clk_ip3_ctrl,
225 .ctrlbit = (1<<21),
226 }, {
227 .name = "i2s_v50",
228 .id = 0,
229 .parent = &clk_p,
230 .enable = s5pv210_clk_ip3_ctrl,
231 .ctrlbit = (1<<4),
232 }, {
233 .name = "i2s_v32",
234 .id = 0,
235 .parent = &clk_p,
236 .enable = s5pv210_clk_ip3_ctrl,
237 .ctrlbit = (1<<4),
238 }, {
239 .name = "i2s_v32",
240 .id = 1,
241 .parent = &clk_p,
242 .enable = s5pv210_clk_ip3_ctrl,
243 .ctrlbit = (1<<4),
244 }
245};
246
247static struct clk init_clocks[] = {
248 {
249 .name = "uart",
250 .id = 0,
251 .parent = &clk_p66,
252 .enable = s5pv210_clk_ip3_ctrl,
253 .ctrlbit = (1<<7),
254 }, {
255 .name = "uart",
256 .id = 1,
257 .parent = &clk_p66,
258 .enable = s5pv210_clk_ip3_ctrl,
259 .ctrlbit = (1<<8),
260 }, {
261 .name = "uart",
262 .id = 2,
263 .parent = &clk_p66,
264 .enable = s5pv210_clk_ip3_ctrl,
265 .ctrlbit = (1<<9),
266 }, {
267 .name = "uart",
268 .id = 3,
269 .parent = &clk_p66,
270 .enable = s5pv210_clk_ip3_ctrl,
271 .ctrlbit = (1<<10),
272 },
273};
274
275static struct clksrc_clk clk_mout_apll = {
276 .clk = {
277 .name = "mout_apll",
278 .id = -1,
279 },
280 .sources = &clk_src_apll,
281 .reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 },
282};
283
284static struct clksrc_clk clk_mout_epll = {
285 .clk = {
286 .name = "mout_epll",
287 .id = -1,
288 },
289 .sources = &clk_src_epll,
290 .reg_src = { .reg = S5P_CLK_SRC0, .shift = 8, .size = 1 },
291};
292
293static struct clksrc_clk clk_mout_mpll = {
294 .clk = {
295 .name = "mout_mpll",
296 .id = -1,
297 },
298 .sources = &clk_src_mpll,
299 .reg_src = { .reg = S5P_CLK_SRC0, .shift = 4, .size = 1 },
300};
301
302static struct clk *clkset_uart_list[] = {
303 [6] = &clk_mout_mpll.clk,
304 [7] = &clk_mout_epll.clk,
305};
306
307static struct clksrc_sources clkset_uart = {
308 .sources = clkset_uart_list,
309 .nr_sources = ARRAY_SIZE(clkset_uart_list),
310};
311
312static struct clksrc_clk clksrcs[] = {
313 {
314 .clk = {
315 .name = "uclk1",
316 .id = -1,
317 .ctrlbit = (1<<17),
318 .enable = s5pv210_clk_ip3_ctrl,
319 },
320 .sources = &clkset_uart,
321 .reg_src = { .reg = S5P_CLK_SRC4, .shift = 16, .size = 4 },
322 .reg_div = { .reg = S5P_CLK_DIV4, .shift = 16, .size = 4 },
323 }
324};
325
326/* Clock initialisation code */
327static struct clksrc_clk *init_parents[] = {
328 &clk_mout_apll,
329 &clk_mout_epll,
330 &clk_mout_mpll,
331};
332
333#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
334
335void __init_or_cpufreq s5pv210_setup_clocks(void)
336{
337 struct clk *xtal_clk;
338 unsigned long xtal;
339 unsigned long armclk;
340 unsigned long hclk200;
341 unsigned long hclk166;
342 unsigned long hclk133;
343 unsigned long pclk100;
344 unsigned long pclk83;
345 unsigned long pclk66;
346 unsigned long apll;
347 unsigned long mpll;
348 unsigned long epll;
349 unsigned int ptr;
350 u32 clkdiv0, clkdiv1;
351
352 printk(KERN_DEBUG "%s: registering clocks\n", __func__);
353
354 clkdiv0 = __raw_readl(S5P_CLK_DIV0);
355 clkdiv1 = __raw_readl(S5P_CLK_DIV1);
356
357 printk(KERN_DEBUG "%s: clkdiv0 = %08x, clkdiv1 = %08x\n",
358 __func__, clkdiv0, clkdiv1);
359
360 xtal_clk = clk_get(NULL, "xtal");
361 BUG_ON(IS_ERR(xtal_clk));
362
363 xtal = clk_get_rate(xtal_clk);
364 clk_put(xtal_clk);
365
366 printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
367
368 apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508);
369 mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
370 epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500);
371
372 printk(KERN_INFO "S5PV210: PLL settings, A=%ld, M=%ld, E=%ld",
373 apll, mpll, epll);
374
375 armclk = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_APLL);
376 if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX200_MASK)
377 hclk200 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK200);
378 else
379 hclk200 = armclk / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK200);
380
381 if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX166_MASK) {
382 hclk166 = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
383 hclk166 = hclk166 / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK166);
384 } else
385 hclk166 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK166);
386
387 if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX133_MASK) {
388 hclk133 = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
389 hclk133 = hclk133 / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK133);
390 } else
391 hclk133 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK133);
392
393 pclk100 = hclk200 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK100);
394 pclk83 = hclk166 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK83);
395 pclk66 = hclk133 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK66);
396
397 printk(KERN_INFO "S5PV210: ARMCLK=%ld, HCLKM=%ld, HCLKD=%ld, \
398 HCLKP=%ld, PCLKM=%ld, PCLKD=%ld, PCLKP=%ld\n",
399 armclk, hclk200, hclk166, hclk133, pclk100, pclk83, pclk66);
400
401 clk_fout_apll.rate = apll;
402 clk_fout_mpll.rate = mpll;
403 clk_fout_epll.rate = epll;
404
405 clk_f.rate = armclk;
406 clk_h.rate = hclk133;
407 clk_p.rate = pclk66;
408 clk_p66.rate = pclk66;
409 clk_p83.rate = pclk83;
410 clk_h133.rate = hclk133;
411 clk_h166.rate = hclk166;
412 clk_h200.rate = hclk200;
413
414 for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
415 s3c_set_clksrc(init_parents[ptr], true);
416
417 for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
418 s3c_set_clksrc(&clksrcs[ptr], true);
419}
420
421static struct clk *clks[] __initdata = {
422 &clk_mout_epll.clk,
423 &clk_mout_mpll.clk,
424};
425
426void __init s5pv210_register_clocks(void)
427{
428 struct clk *clkp;
429 int ret;
430 int ptr;
431
432 ret = s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
433 if (ret > 0)
434 printk(KERN_ERR "Failed to register %u clocks\n", ret);
435
436 s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
437 s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
438
439 ret = s3c24xx_register_clocks(sys_clks, ARRAY_SIZE(sys_clks));
440 if (ret > 0)
441 printk(KERN_ERR "Failed to register system clocks\n");
442
443 clkp = init_clocks_disable;
444 for (ptr = 0; ptr < ARRAY_SIZE(init_clocks_disable); ptr++, clkp++) {
445 ret = s3c24xx_register_clock(clkp);
446 if (ret < 0) {
447 printk(KERN_ERR "Failed to register clock %s (%d)\n",
448 clkp->name, ret);
449 }
450 (clkp->enable)(clkp, 0);
451 }
452
453 s3c_pwmclk_init();
454}
generated by cgit v1.2.2 (git 2.25.0) at 2026-01-06 08:48:27 -0500