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Merge remote-tracking branch 's5p/for-next'
[linux-2.6/next.git] / arch / arm / mach-ux500 / clock.c
blobe832664d1bd944687c2db0533cec879bb93ee011
1 /*
2 * Copyright (C) 2009 ST-Ericsson
3 * Copyright (C) 2009 STMicroelectronics
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/list.h>
12 #include <linux/errno.h>
13 #include <linux/err.h>
14 #include <linux/clk.h>
15 #include <linux/io.h>
16 #include <linux/clkdev.h>
17 #include <linux/cpufreq.h>
18
19 #include <plat/mtu.h>
20 #include <mach/hardware.h>
21 #include "clock.h"
22
23 #ifdef CONFIG_DEBUG_FS
24 #include <linux/debugfs.h>
25 #include <linux/uaccess.h> /* for copy_from_user */
26 static LIST_HEAD(clk_list);
27 #endif
28
29 #define PRCC_PCKEN 0x00
30 #define PRCC_PCKDIS 0x04
31 #define PRCC_KCKEN 0x08
32 #define PRCC_KCKDIS 0x0C
33
34 #define PRCM_YYCLKEN0_MGT_SET 0x510
35 #define PRCM_YYCLKEN1_MGT_SET 0x514
36 #define PRCM_YYCLKEN0_MGT_CLR 0x518
37 #define PRCM_YYCLKEN1_MGT_CLR 0x51C
38 #define PRCM_YYCLKEN0_MGT_VAL 0x520
39 #define PRCM_YYCLKEN1_MGT_VAL 0x524
40
41 #define PRCM_SVAMMDSPCLK_MGT 0x008
42 #define PRCM_SIAMMDSPCLK_MGT 0x00C
43 #define PRCM_SGACLK_MGT 0x014
44 #define PRCM_UARTCLK_MGT 0x018
45 #define PRCM_MSP02CLK_MGT 0x01C
46 #define PRCM_MSP1CLK_MGT 0x288
47 #define PRCM_I2CCLK_MGT 0x020
48 #define PRCM_SDMMCCLK_MGT 0x024
49 #define PRCM_SLIMCLK_MGT 0x028
50 #define PRCM_PER1CLK_MGT 0x02C
51 #define PRCM_PER2CLK_MGT 0x030
52 #define PRCM_PER3CLK_MGT 0x034
53 #define PRCM_PER5CLK_MGT 0x038
54 #define PRCM_PER6CLK_MGT 0x03C
55 #define PRCM_PER7CLK_MGT 0x040
56 #define PRCM_LCDCLK_MGT 0x044
57 #define PRCM_BMLCLK_MGT 0x04C
58 #define PRCM_HSITXCLK_MGT 0x050
59 #define PRCM_HSIRXCLK_MGT 0x054
60 #define PRCM_HDMICLK_MGT 0x058
61 #define PRCM_APEATCLK_MGT 0x05C
62 #define PRCM_APETRACECLK_MGT 0x060
63 #define PRCM_MCDECLK_MGT 0x064
64 #define PRCM_IPI2CCLK_MGT 0x068
65 #define PRCM_DSIALTCLK_MGT 0x06C
66 #define PRCM_DMACLK_MGT 0x074
67 #define PRCM_B2R2CLK_MGT 0x078
68 #define PRCM_TVCLK_MGT 0x07C
69 #define PRCM_TCR 0x1C8
70 #define PRCM_TCR_STOPPED (1 << 16)
71 #define PRCM_TCR_DOZE_MODE (1 << 17)
72 #define PRCM_UNIPROCLK_MGT 0x278
73 #define PRCM_SSPCLK_MGT 0x280
74 #define PRCM_RNGCLK_MGT 0x284
75 #define PRCM_UICCCLK_MGT 0x27C
76
77 #define PRCM_MGT_ENABLE (1 << 8)
78
79 static DEFINE_SPINLOCK(clocks_lock);
80
81 static void __clk_enable(struct clk *clk)
82 {
83 if (clk->enabled++ == 0) {
84 if (clk->parent_cluster)
85 __clk_enable(clk->parent_cluster);
86
87 if (clk->parent_periph)
88 __clk_enable(clk->parent_periph);
89
90 if (clk->ops && clk->ops->enable)
91 clk->ops->enable(clk);
92 }
93 }
94
95 int clk_enable(struct clk *clk)
96 {
97 unsigned long flags;
98
99 spin_lock_irqsave(&clocks_lock, flags);
100 __clk_enable(clk);
101 spin_unlock_irqrestore(&clocks_lock, flags);
102
103 return 0;
104 }
105 EXPORT_SYMBOL(clk_enable);
106
107 static void __clk_disable(struct clk *clk)
108 {
109 if (--clk->enabled == 0) {
110 if (clk->ops && clk->ops->disable)
111 clk->ops->disable(clk);
112
113 if (clk->parent_periph)
114 __clk_disable(clk->parent_periph);
115
116 if (clk->parent_cluster)
117 __clk_disable(clk->parent_cluster);
118 }
119 }
120
121 void clk_disable(struct clk *clk)
122 {
123 unsigned long flags;
124
125 WARN_ON(!clk->enabled);
126
127 spin_lock_irqsave(&clocks_lock, flags);
128 __clk_disable(clk);
129 spin_unlock_irqrestore(&clocks_lock, flags);
130 }
131 EXPORT_SYMBOL(clk_disable);
132
133 /*
134 * The MTU has a separate, rather complex muxing setup
135 * with alternative parents (peripheral cluster or
136 * ULP or fixed 32768 Hz) depending on settings
137 */
138 static unsigned long clk_mtu_get_rate(struct clk *clk)
139 {
140 void __iomem *addr;
141 u32 tcr;
142 int mtu = (int) clk->data;
143 /*
144 * One of these is selected eventually
145 * TODO: Replace the constant with a reference
146 * to the ULP source once this is modeled.
147 */
148 unsigned long clk32k = 32768;
149 unsigned long mturate;
150 unsigned long retclk;
151
152 if (cpu_is_u5500())
153 addr = __io_address(U5500_PRCMU_BASE);
154 else if (cpu_is_u8500())
155 addr = __io_address(U8500_PRCMU_BASE);
156 else
157 ux500_unknown_soc();
158
159 /*
160 * On a startup, always conifgure the TCR to the doze mode;
161 * bootloaders do it for us. Do this in the kernel too.
162 */
163 writel(PRCM_TCR_DOZE_MODE, addr + PRCM_TCR);
164
165 tcr = readl(addr + PRCM_TCR);
166
167 /* Get the rate from the parent as a default */
168 if (clk->parent_periph)
169 mturate = clk_get_rate(clk->parent_periph);
170 else if (clk->parent_cluster)
171 mturate = clk_get_rate(clk->parent_cluster);
172 else
173 /* We need to be connected SOMEWHERE */
174 BUG();
175
176 /* Return the clock selected for this MTU */
177 if (tcr & (1 << mtu))
178 retclk = clk32k;
179 else
180 retclk = mturate;
181
182 pr_info("MTU%d clock rate: %lu Hz\n", mtu, retclk);
183 return retclk;
184 }
185
186 unsigned long clk_get_rate(struct clk *clk)
187 {
188 unsigned long rate;
189
190 /*
191 * If there is a custom getrate callback for this clock,
192 * it will take precedence.
193 */
194 if (clk->get_rate)
195 return clk->get_rate(clk);
196
197 if (clk->ops && clk->ops->get_rate)
198 return clk->ops->get_rate(clk);
199
200 rate = clk->rate;
201 if (!rate) {
202 if (clk->parent_periph)
203 rate = clk_get_rate(clk->parent_periph);
204 else if (clk->parent_cluster)
205 rate = clk_get_rate(clk->parent_cluster);
206 }
207
208 return rate;
209 }
210 EXPORT_SYMBOL(clk_get_rate);
211
212 long clk_round_rate(struct clk *clk, unsigned long rate)
213 {
214 /*TODO*/
215 return rate;
216 }
217 EXPORT_SYMBOL(clk_round_rate);
218
219 int clk_set_rate(struct clk *clk, unsigned long rate)
220 {
221 clk->rate = rate;
222 return 0;
223 }
224 EXPORT_SYMBOL(clk_set_rate);
225
226 static void clk_prcmu_enable(struct clk *clk)
227 {
228 void __iomem *cg_set_reg = __io_address(U8500_PRCMU_BASE)
229 + PRCM_YYCLKEN0_MGT_SET + clk->prcmu_cg_off;
230
231 writel(1 << clk->prcmu_cg_bit, cg_set_reg);
232 }
233
234 static void clk_prcmu_disable(struct clk *clk)
235 {
236 void __iomem *cg_clr_reg = __io_address(U8500_PRCMU_BASE)
237 + PRCM_YYCLKEN0_MGT_CLR + clk->prcmu_cg_off;
238
239 writel(1 << clk->prcmu_cg_bit, cg_clr_reg);
240 }
241
242 /* ED doesn't have the combined set/clr registers */
243 static void clk_prcmu_ed_enable(struct clk *clk)
244 {
245 void __iomem *addr = __io_address(U8500_PRCMU_BASE)
246 + clk->prcmu_cg_mgt;
247
248 writel(readl(addr) | PRCM_MGT_ENABLE, addr);
249 }
250
251 static void clk_prcmu_ed_disable(struct clk *clk)
252 {
253 void __iomem *addr = __io_address(U8500_PRCMU_BASE)
254 + clk->prcmu_cg_mgt;
255
256 writel(readl(addr) & ~PRCM_MGT_ENABLE, addr);
257 }
258
259 static struct clkops clk_prcmu_ops = {
260 .enable = clk_prcmu_enable,
261 .disable = clk_prcmu_disable,
262 };
263
264 static unsigned int clkrst_base[] = {
265 [1] = U8500_CLKRST1_BASE,
266 [2] = U8500_CLKRST2_BASE,
267 [3] = U8500_CLKRST3_BASE,
268 [5] = U8500_CLKRST5_BASE,
269 [6] = U8500_CLKRST6_BASE,
270 [7] = U8500_CLKRST7_BASE_ED,
271 };
272
273 static void clk_prcc_enable(struct clk *clk)
274 {
275 void __iomem *addr = __io_address(clkrst_base[clk->cluster]);
276
277 if (clk->prcc_kernel != -1)
278 writel(1 << clk->prcc_kernel, addr + PRCC_KCKEN);
279
280 if (clk->prcc_bus != -1)
281 writel(1 << clk->prcc_bus, addr + PRCC_PCKEN);
282 }
283
284 static void clk_prcc_disable(struct clk *clk)
285 {
286 void __iomem *addr = __io_address(clkrst_base[clk->cluster]);
287
288 if (clk->prcc_bus != -1)
289 writel(1 << clk->prcc_bus, addr + PRCC_PCKDIS);
290
291 if (clk->prcc_kernel != -1)
292 writel(1 << clk->prcc_kernel, addr + PRCC_KCKDIS);
293 }
294
295 static struct clkops clk_prcc_ops = {
296 .enable = clk_prcc_enable,
297 .disable = clk_prcc_disable,
298 };
299
300 static struct clk clk_32khz = {
301 .name = "clk_32khz",
302 .rate = 32000,
303 };
304
305 /*
306 * PRCMU level clock gating
307 */
308
309 /* Bank 0 */
310 static DEFINE_PRCMU_CLK(svaclk, 0x0, 2, SVAMMDSPCLK);
311 static DEFINE_PRCMU_CLK(siaclk, 0x0, 3, SIAMMDSPCLK);
312 static DEFINE_PRCMU_CLK(sgaclk, 0x0, 4, SGACLK);
313 static DEFINE_PRCMU_CLK_RATE(uartclk, 0x0, 5, UARTCLK, 38400000);
314 static DEFINE_PRCMU_CLK(msp02clk, 0x0, 6, MSP02CLK);
315 static DEFINE_PRCMU_CLK(msp1clk, 0x0, 7, MSP1CLK); /* v1 */
316 static DEFINE_PRCMU_CLK_RATE(i2cclk, 0x0, 8, I2CCLK, 48000000);
317 static DEFINE_PRCMU_CLK_RATE(sdmmcclk, 0x0, 9, SDMMCCLK, 100000000);
318 static DEFINE_PRCMU_CLK(slimclk, 0x0, 10, SLIMCLK);
319 static DEFINE_PRCMU_CLK(per1clk, 0x0, 11, PER1CLK);
320 static DEFINE_PRCMU_CLK(per2clk, 0x0, 12, PER2CLK);
321 static DEFINE_PRCMU_CLK(per3clk, 0x0, 13, PER3CLK);
322 static DEFINE_PRCMU_CLK(per5clk, 0x0, 14, PER5CLK);
323 static DEFINE_PRCMU_CLK_RATE(per6clk, 0x0, 15, PER6CLK, 133330000);
324 static DEFINE_PRCMU_CLK_RATE(per7clk, 0x0, 16, PER7CLK, 100000000);
325 static DEFINE_PRCMU_CLK(lcdclk, 0x0, 17, LCDCLK);
326 static DEFINE_PRCMU_CLK(bmlclk, 0x0, 18, BMLCLK);
327 static DEFINE_PRCMU_CLK(hsitxclk, 0x0, 19, HSITXCLK);
328 static DEFINE_PRCMU_CLK(hsirxclk, 0x0, 20, HSIRXCLK);
329 static DEFINE_PRCMU_CLK(hdmiclk, 0x0, 21, HDMICLK);
330 static DEFINE_PRCMU_CLK(apeatclk, 0x0, 22, APEATCLK);
331 static DEFINE_PRCMU_CLK(apetraceclk, 0x0, 23, APETRACECLK);
332 static DEFINE_PRCMU_CLK(mcdeclk, 0x0, 24, MCDECLK);
333 static DEFINE_PRCMU_CLK(ipi2clk, 0x0, 25, IPI2CCLK);
334 static DEFINE_PRCMU_CLK(dsialtclk, 0x0, 26, DSIALTCLK); /* v1 */
335 static DEFINE_PRCMU_CLK(dmaclk, 0x0, 27, DMACLK);
336 static DEFINE_PRCMU_CLK(b2r2clk, 0x0, 28, B2R2CLK);
337 static DEFINE_PRCMU_CLK(tvclk, 0x0, 29, TVCLK);
338 static DEFINE_PRCMU_CLK(uniproclk, 0x0, 30, UNIPROCLK); /* v1 */
339 static DEFINE_PRCMU_CLK_RATE(sspclk, 0x0, 31, SSPCLK, 48000000); /* v1 */
340
341 /* Bank 1 */
342 static DEFINE_PRCMU_CLK(rngclk, 0x4, 0, RNGCLK); /* v1 */
343 static DEFINE_PRCMU_CLK(uiccclk, 0x4, 1, UICCCLK); /* v1 */
344
345 /*
346 * PRCC level clock gating
347 * Format: per#, clk, PCKEN bit, KCKEN bit, parent
348 */
349
350 /* Peripheral Cluster #1 */
351 static DEFINE_PRCC_CLK(1, i2c4, 10, 9, &clk_i2cclk);
352 static DEFINE_PRCC_CLK(1, gpio0, 9, -1, NULL);
353 static DEFINE_PRCC_CLK(1, slimbus0, 8, 8, &clk_slimclk);
354 static DEFINE_PRCC_CLK(1, spi3_ed, 7, 7, NULL);
355 static DEFINE_PRCC_CLK(1, spi3_v1, 7, -1, NULL);
356 static DEFINE_PRCC_CLK(1, i2c2, 6, 6, &clk_i2cclk);
357 static DEFINE_PRCC_CLK(1, sdi0, 5, 5, &clk_sdmmcclk);
358 static DEFINE_PRCC_CLK(1, msp1_ed, 4, 4, &clk_msp02clk);
359 static DEFINE_PRCC_CLK(1, msp1_v1, 4, 4, &clk_msp1clk);
360 static DEFINE_PRCC_CLK(1, msp0, 3, 3, &clk_msp02clk);
361 static DEFINE_PRCC_CLK(1, i2c1, 2, 2, &clk_i2cclk);
362 static DEFINE_PRCC_CLK(1, uart1, 1, 1, &clk_uartclk);
363 static DEFINE_PRCC_CLK(1, uart0, 0, 0, &clk_uartclk);
364
365 /* Peripheral Cluster #2 */
366
367 static DEFINE_PRCC_CLK(2, gpio1_ed, 12, -1, NULL);
368 static DEFINE_PRCC_CLK(2, ssitx_ed, 11, -1, NULL);
369 static DEFINE_PRCC_CLK(2, ssirx_ed, 10, -1, NULL);
370 static DEFINE_PRCC_CLK(2, spi0_ed, 9, -1, NULL);
371 static DEFINE_PRCC_CLK(2, sdi3_ed, 8, 6, &clk_sdmmcclk);
372 static DEFINE_PRCC_CLK(2, sdi1_ed, 7, 5, &clk_sdmmcclk);
373 static DEFINE_PRCC_CLK(2, msp2_ed, 6, 4, &clk_msp02clk);
374 static DEFINE_PRCC_CLK(2, sdi4_ed, 4, 2, &clk_sdmmcclk);
375 static DEFINE_PRCC_CLK(2, pwl_ed, 3, 1, NULL);
376 static DEFINE_PRCC_CLK(2, spi1_ed, 2, -1, NULL);
377 static DEFINE_PRCC_CLK(2, spi2_ed, 1, -1, NULL);
378 static DEFINE_PRCC_CLK(2, i2c3_ed, 0, 0, &clk_i2cclk);
379
380 static DEFINE_PRCC_CLK(2, gpio1_v1, 11, -1, NULL);
381 static DEFINE_PRCC_CLK(2, ssitx_v1, 10, 7, NULL);
382 static DEFINE_PRCC_CLK(2, ssirx_v1, 9, 6, NULL);
383 static DEFINE_PRCC_CLK(2, spi0_v1, 8, -1, NULL);
384 static DEFINE_PRCC_CLK(2, sdi3_v1, 7, 5, &clk_sdmmcclk);
385 static DEFINE_PRCC_CLK(2, sdi1_v1, 6, 4, &clk_sdmmcclk);
386 static DEFINE_PRCC_CLK(2, msp2_v1, 5, 3, &clk_msp02clk);
387 static DEFINE_PRCC_CLK(2, sdi4_v1, 4, 2, &clk_sdmmcclk);
388 static DEFINE_PRCC_CLK(2, pwl_v1, 3, 1, NULL);
389 static DEFINE_PRCC_CLK(2, spi1_v1, 2, -1, NULL);
390 static DEFINE_PRCC_CLK(2, spi2_v1, 1, -1, NULL);
391 static DEFINE_PRCC_CLK(2, i2c3_v1, 0, 0, &clk_i2cclk);
392
393 /* Peripheral Cluster #3 */
394 static DEFINE_PRCC_CLK(3, gpio2, 8, -1, NULL);
395 static DEFINE_PRCC_CLK(3, sdi5, 7, 7, &clk_sdmmcclk);
396 static DEFINE_PRCC_CLK(3, uart2, 6, 6, &clk_uartclk);
397 static DEFINE_PRCC_CLK(3, ske, 5, 5, &clk_32khz);
398 static DEFINE_PRCC_CLK(3, sdi2, 4, 4, &clk_sdmmcclk);
399 static DEFINE_PRCC_CLK(3, i2c0, 3, 3, &clk_i2cclk);
400 static DEFINE_PRCC_CLK(3, ssp1_ed, 2, 2, &clk_i2cclk);
401 static DEFINE_PRCC_CLK(3, ssp0_ed, 1, 1, &clk_i2cclk);
402 static DEFINE_PRCC_CLK(3, ssp1_v1, 2, 2, &clk_sspclk);
403 static DEFINE_PRCC_CLK(3, ssp0_v1, 1, 1, &clk_sspclk);
404 static DEFINE_PRCC_CLK(3, fsmc, 0, -1, NULL);
405
406 /* Peripheral Cluster #4 is in the always on domain */
407
408 /* Peripheral Cluster #5 */
409 static DEFINE_PRCC_CLK(5, gpio3, 1, -1, NULL);
410 static DEFINE_PRCC_CLK(5, usb_ed, 0, 0, &clk_i2cclk);
411 static DEFINE_PRCC_CLK(5, usb_v1, 0, 0, NULL);
412
413 /* Peripheral Cluster #6 */
414
415 /* MTU ID in data */
416 static DEFINE_PRCC_CLK_CUSTOM(6, mtu1_v1, 8, -1, NULL, clk_mtu_get_rate, 1);
417 static DEFINE_PRCC_CLK_CUSTOM(6, mtu0_v1, 7, -1, NULL, clk_mtu_get_rate, 0);
418 static DEFINE_PRCC_CLK(6, cfgreg_v1, 6, 6, NULL);
419 static DEFINE_PRCC_CLK(6, dmc_ed, 6, 6, NULL);
420 static DEFINE_PRCC_CLK(6, hash1, 5, -1, NULL);
421 static DEFINE_PRCC_CLK(6, unipro_v1, 4, 1, &clk_uniproclk);
422 static DEFINE_PRCC_CLK(6, cryp1_ed, 4, -1, NULL);
423 static DEFINE_PRCC_CLK(6, pka, 3, -1, NULL);
424 static DEFINE_PRCC_CLK(6, hash0, 2, -1, NULL);
425 static DEFINE_PRCC_CLK(6, cryp0, 1, -1, NULL);
426 static DEFINE_PRCC_CLK(6, rng_ed, 0, 0, &clk_i2cclk);
427 static DEFINE_PRCC_CLK(6, rng_v1, 0, 0, &clk_rngclk);
428
429 /* Peripheral Cluster #7 */
430
431 static DEFINE_PRCC_CLK(7, tzpc0_ed, 4, -1, NULL);
432 /* MTU ID in data */
433 static DEFINE_PRCC_CLK_CUSTOM(7, mtu1_ed, 3, -1, NULL, clk_mtu_get_rate, 1);
434 static DEFINE_PRCC_CLK_CUSTOM(7, mtu0_ed, 2, -1, NULL, clk_mtu_get_rate, 0);
435 static DEFINE_PRCC_CLK(7, wdg_ed, 1, -1, NULL);
436 static DEFINE_PRCC_CLK(7, cfgreg_ed, 0, -1, NULL);
437
438 static struct clk clk_dummy_apb_pclk = {
439 .name = "apb_pclk",
440 };
441
442 static struct clk_lookup u8500_common_clks[] = {
443 CLK(dummy_apb_pclk, NULL, "apb_pclk"),
444
445 /* Peripheral Cluster #1 */
446 CLK(gpio0, "gpio.0", NULL),
447 CLK(gpio0, "gpio.1", NULL),
448 CLK(slimbus0, "slimbus0", NULL),
449 CLK(i2c2, "nmk-i2c.2", NULL),
450 CLK(sdi0, "sdi0", NULL),
451 CLK(msp0, "msp0", NULL),
452 CLK(i2c1, "nmk-i2c.1", NULL),
453 CLK(uart1, "uart1", NULL),
454 CLK(uart0, "uart0", NULL),
455
456 /* Peripheral Cluster #3 */
457 CLK(gpio2, "gpio.2", NULL),
458 CLK(gpio2, "gpio.3", NULL),
459 CLK(gpio2, "gpio.4", NULL),
460 CLK(gpio2, "gpio.5", NULL),
461 CLK(sdi5, "sdi5", NULL),
462 CLK(uart2, "uart2", NULL),
463 CLK(ske, "ske", NULL),
464 CLK(ske, "nmk-ske-keypad", NULL),
465 CLK(sdi2, "sdi2", NULL),
466 CLK(i2c0, "nmk-i2c.0", NULL),
467 CLK(fsmc, "fsmc", NULL),
468
469 /* Peripheral Cluster #5 */
470 CLK(gpio3, "gpio.8", NULL),
471
472 /* Peripheral Cluster #6 */
473 CLK(hash1, "hash1", NULL),
474 CLK(pka, "pka", NULL),
475 CLK(hash0, "hash0", NULL),
476 CLK(cryp0, "cryp0", NULL),
477
478 /* PRCMU level clock gating */
479
480 /* Bank 0 */
481 CLK(svaclk, "sva", NULL),
482 CLK(siaclk, "sia", NULL),
483 CLK(sgaclk, "sga", NULL),
484 CLK(slimclk, "slim", NULL),
485 CLK(lcdclk, "lcd", NULL),
486 CLK(bmlclk, "bml", NULL),
487 CLK(hsitxclk, "stm-hsi.0", NULL),
488 CLK(hsirxclk, "stm-hsi.1", NULL),
489 CLK(hdmiclk, "hdmi", NULL),
490 CLK(apeatclk, "apeat", NULL),
491 CLK(apetraceclk, "apetrace", NULL),
492 CLK(mcdeclk, "mcde", NULL),
493 CLK(ipi2clk, "ipi2", NULL),
494 CLK(dmaclk, "dma40.0", NULL),
495 CLK(b2r2clk, "b2r2", NULL),
496 CLK(tvclk, "tv", NULL),
497 };
498
499 static struct clk_lookup u8500_ed_clks[] = {
500 /* Peripheral Cluster #1 */
501 CLK(spi3_ed, "spi3", NULL),
502 CLK(msp1_ed, "msp1", NULL),
503
504 /* Peripheral Cluster #2 */
505 CLK(gpio1_ed, "gpio.6", NULL),
506 CLK(gpio1_ed, "gpio.7", NULL),
507 CLK(ssitx_ed, "ssitx", NULL),
508 CLK(ssirx_ed, "ssirx", NULL),
509 CLK(spi0_ed, "spi0", NULL),
510 CLK(sdi3_ed, "sdi3", NULL),
511 CLK(sdi1_ed, "sdi1", NULL),
512 CLK(msp2_ed, "msp2", NULL),
513 CLK(sdi4_ed, "sdi4", NULL),
514 CLK(pwl_ed, "pwl", NULL),
515 CLK(spi1_ed, "spi1", NULL),
516 CLK(spi2_ed, "spi2", NULL),
517 CLK(i2c3_ed, "nmk-i2c.3", NULL),
518
519 /* Peripheral Cluster #3 */
520 CLK(ssp1_ed, "ssp1", NULL),
521 CLK(ssp0_ed, "ssp0", NULL),
522
523 /* Peripheral Cluster #5 */
524 CLK(usb_ed, "musb-ux500.0", "usb"),
525
526 /* Peripheral Cluster #6 */
527 CLK(dmc_ed, "dmc", NULL),
528 CLK(cryp1_ed, "cryp1", NULL),
529 CLK(rng_ed, "rng", NULL),
530
531 /* Peripheral Cluster #7 */
532 CLK(tzpc0_ed, "tzpc0", NULL),
533 CLK(mtu1_ed, "mtu1", NULL),
534 CLK(mtu0_ed, "mtu0", NULL),
535 CLK(wdg_ed, "wdg", NULL),
536 CLK(cfgreg_ed, "cfgreg", NULL),
537 };
538
539 static struct clk_lookup u8500_v1_clks[] = {
540 /* Peripheral Cluster #1 */
541 CLK(i2c4, "nmk-i2c.4", NULL),
542 CLK(spi3_v1, "spi3", NULL),
543 CLK(msp1_v1, "msp1", NULL),
544
545 /* Peripheral Cluster #2 */
546 CLK(gpio1_v1, "gpio.6", NULL),
547 CLK(gpio1_v1, "gpio.7", NULL),
548 CLK(ssitx_v1, "ssitx", NULL),
549 CLK(ssirx_v1, "ssirx", NULL),
550 CLK(spi0_v1, "spi0", NULL),
551 CLK(sdi3_v1, "sdi3", NULL),
552 CLK(sdi1_v1, "sdi1", NULL),
553 CLK(msp2_v1, "msp2", NULL),
554 CLK(sdi4_v1, "sdi4", NULL),
555 CLK(pwl_v1, "pwl", NULL),
556 CLK(spi1_v1, "spi1", NULL),
557 CLK(spi2_v1, "spi2", NULL),
558 CLK(i2c3_v1, "nmk-i2c.3", NULL),
559
560 /* Peripheral Cluster #3 */
561 CLK(ssp1_v1, "ssp1", NULL),
562 CLK(ssp0_v1, "ssp0", NULL),
563
564 /* Peripheral Cluster #5 */
565 CLK(usb_v1, "musb-ux500.0", "usb"),
566
567 /* Peripheral Cluster #6 */
568 CLK(mtu1_v1, "mtu1", NULL),
569 CLK(mtu0_v1, "mtu0", NULL),
570 CLK(cfgreg_v1, "cfgreg", NULL),
571 CLK(hash1, "hash1", NULL),
572 CLK(unipro_v1, "unipro", NULL),
573 CLK(rng_v1, "rng", NULL),
574
575 /* PRCMU level clock gating */
576
577 /* Bank 0 */
578 CLK(uniproclk, "uniproclk", NULL),
579 CLK(dsialtclk, "dsialt", NULL),
580
581 /* Bank 1 */
582 CLK(rngclk, "rng", NULL),
583 CLK(uiccclk, "uicc", NULL),
584 };
585
586 #ifdef CONFIG_DEBUG_FS
587 /*
588 * debugfs support to trace clock tree hierarchy and attributes with
589 * powerdebug
590 */
591 static struct dentry *clk_debugfs_root;
592
593 void __init clk_debugfs_add_table(struct clk_lookup *cl, size_t num)
594 {
595 while (num--) {
596 /* Check that the clock has not been already registered */
597 if (!(cl->clk->list.prev != cl->clk->list.next))
598 list_add_tail(&cl->clk->list, &clk_list);
599
600 cl++;
601 }
602 }
603
604 static ssize_t usecount_dbg_read(struct file *file, char __user *buf,
605 size_t size, loff_t *off)
606 {
607 struct clk *clk = file->f_dentry->d_inode->i_private;
608 char cusecount[128];
609 unsigned int len;
610
611 len = sprintf(cusecount, "%u\n", clk->enabled);
612 return simple_read_from_buffer(buf, size, off, cusecount, len);
613 }
614
615 static ssize_t rate_dbg_read(struct file *file, char __user *buf,
616 size_t size, loff_t *off)
617 {
618 struct clk *clk = file->f_dentry->d_inode->i_private;
619 char crate[128];
620 unsigned int rate;
621 unsigned int len;
622
623 rate = clk_get_rate(clk);
624 len = sprintf(crate, "%u\n", rate);
625 return simple_read_from_buffer(buf, size, off, crate, len);
626 }
627
628 static const struct file_operations usecount_fops = {
629 .read = usecount_dbg_read,
630 };
631
632 static const struct file_operations set_rate_fops = {
633 .read = rate_dbg_read,
634 };
635
636 static struct dentry *clk_debugfs_register_dir(struct clk *c,
637 struct dentry *p_dentry)
638 {
639 struct dentry *d, *clk_d;
640 const char *p = c->name;
641
642 if (!p)
643 p = "BUG";
644
645 clk_d = debugfs_create_dir(p, p_dentry);
646 if (!clk_d)
647 return NULL;
648
649 d = debugfs_create_file("usecount", S_IRUGO,
650 clk_d, c, &usecount_fops);
651 if (!d)
652 goto err_out;
653 d = debugfs_create_file("rate", S_IRUGO,
654 clk_d, c, &set_rate_fops);
655 if (!d)
656 goto err_out;
657 /*
658 * TODO : not currently available in ux500
659 * d = debugfs_create_x32("flags", S_IRUGO, clk_d, (u32 *)&c->flags);
660 * if (!d)
661 * goto err_out;
662 */
663
664 return clk_d;
665
666 err_out:
667 debugfs_remove_recursive(clk_d);
668 return NULL;
669 }
670
671 static int clk_debugfs_register_one(struct clk *c)
672 {
673 struct clk *pa = c->parent_periph;
674 struct clk *bpa = c->parent_cluster;
675
676 if (!(bpa && !pa)) {
677 c->dent = clk_debugfs_register_dir(c,
678 pa ? pa->dent : clk_debugfs_root);
679 if (!c->dent)
680 return -ENOMEM;
681 }
682
683 if (bpa) {
684 c->dent_bus = clk_debugfs_register_dir(c,
685 bpa->dent_bus ? bpa->dent_bus : bpa->dent);
686 if ((!c->dent_bus) && (c->dent)) {
687 debugfs_remove_recursive(c->dent);
688 c->dent = NULL;
689 return -ENOMEM;
690 }
691 }
692 return 0;
693 }
694
695 static int clk_debugfs_register(struct clk *c)
696 {
697 int err;
698 struct clk *pa = c->parent_periph;
699 struct clk *bpa = c->parent_cluster;
700
701 if (pa && (!pa->dent && !pa->dent_bus)) {
702 err = clk_debugfs_register(pa);
703 if (err)
704 return err;
705 }
706
707 if (bpa && (!bpa->dent && !bpa->dent_bus)) {
708 err = clk_debugfs_register(bpa);
709 if (err)
710 return err;
711 }
712
713 if ((!c->dent) && (!c->dent_bus)) {
714 err = clk_debugfs_register_one(c);
715 if (err)
716 return err;
717 }
718 return 0;
719 }
720
721 static int __init clk_debugfs_init(void)
722 {
723 struct clk *c;
724 struct dentry *d;
725 int err;
726
727 d = debugfs_create_dir("clock", NULL);
728 if (!d)
729 return -ENOMEM;
730 clk_debugfs_root = d;
731
732 list_for_each_entry(c, &clk_list, list) {
733 err = clk_debugfs_register(c);
734 if (err)
735 goto err_out;
736 }
737 return 0;
738 err_out:
739 debugfs_remove_recursive(clk_debugfs_root);
740 return err;
741 }
742
743 late_initcall(clk_debugfs_init);
744 #endif /* defined(CONFIG_DEBUG_FS) */
745
746 unsigned long clk_smp_twd_rate = 400000000;
747
748 unsigned long clk_smp_twd_get_rate(struct clk *clk)
749 {
750 return clk_smp_twd_rate;
751 }
752
753 static struct clk clk_smp_twd = {
754 .get_rate = clk_smp_twd_get_rate,
755 .name = "smp_twd",
756 };
757
758 static struct clk_lookup clk_smp_twd_lookup = {
759 .dev_id = "smp_twd",
760 .clk = &clk_smp_twd,
761 };
762
763 #ifdef CONFIG_CPU_FREQ
764
765 static int clk_twd_cpufreq_transition(struct notifier_block *nb,
766 unsigned long state, void *data)
767 {
768 struct cpufreq_freqs *f = data;
769
770 if (state == CPUFREQ_PRECHANGE) {
771 /* Save frequency in simple Hz */
772 clk_smp_twd_rate = f->new * 1000;
773 }
774
775 return NOTIFY_OK;
776 }
777
778 static struct notifier_block clk_twd_cpufreq_nb = {
779 .notifier_call = clk_twd_cpufreq_transition,
780 };
781
782 static int clk_init_smp_twd_cpufreq(void)
783 {
784 return cpufreq_register_notifier(&clk_twd_cpufreq_nb,
785 CPUFREQ_TRANSITION_NOTIFIER);
786 }
787 late_initcall(clk_init_smp_twd_cpufreq);
788
789 #endif
790
791 int __init clk_init(void)
792 {
793 if (cpu_is_u8500ed()) {
794 clk_prcmu_ops.enable = clk_prcmu_ed_enable;
795 clk_prcmu_ops.disable = clk_prcmu_ed_disable;
796 clk_per6clk.rate = 100000000;
797 } else if (cpu_is_u5500()) {
798 /* Clock tree for U5500 not implemented yet */
799 clk_prcc_ops.enable = clk_prcc_ops.disable = NULL;
800 clk_prcmu_ops.enable = clk_prcmu_ops.disable = NULL;
801 clk_uartclk.rate = 36360000;
802 clk_sdmmcclk.rate = 99900000;
803 }
804
805 clkdev_add_table(u8500_common_clks, ARRAY_SIZE(u8500_common_clks));
806 if (cpu_is_u8500ed())
807 clkdev_add_table(u8500_ed_clks, ARRAY_SIZE(u8500_ed_clks));
808 else
809 clkdev_add_table(u8500_v1_clks, ARRAY_SIZE(u8500_v1_clks));
810
811 clkdev_add(&clk_smp_twd_lookup);
812
813 #ifdef CONFIG_DEBUG_FS
814 clk_debugfs_add_table(u8500_common_clks, ARRAY_SIZE(u8500_common_clks));
815 if (cpu_is_u8500ed())
816 clk_debugfs_add_table(u8500_ed_clks, ARRAY_SIZE(u8500_ed_clks));
817 else
818 clk_debugfs_add_table(u8500_v1_clks, ARRAY_SIZE(u8500_v1_clks));
819 #endif
820 return 0;
821 }
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