summaryrefslogtreecommitdiff
path: root/arch/arm/mach-ux500/clock.c
blob: 9feb6bc7f20edda71763f470a9baae1db0c99e49 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
/*
 *  Copyright (C) 2009 ST-Ericsson
 *  Copyright (C) 2009 STMicroelectronics
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <linux/cpufreq.h>

#include <plat/mtu.h>
#include <mach/hardware.h>
#include "clock.h"

#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/uaccess.h>	/* for copy_from_user */
static LIST_HEAD(clk_list);
#endif

#define PRCC_PCKEN		0x00
#define PRCC_PCKDIS		0x04
#define PRCC_KCKEN		0x08
#define PRCC_KCKDIS		0x0C

#define PRCM_YYCLKEN0_MGT_SET	0x510
#define PRCM_YYCLKEN1_MGT_SET	0x514
#define PRCM_YYCLKEN0_MGT_CLR	0x518
#define PRCM_YYCLKEN1_MGT_CLR	0x51C
#define PRCM_YYCLKEN0_MGT_VAL	0x520
#define PRCM_YYCLKEN1_MGT_VAL	0x524

#define PRCM_SVAMMDSPCLK_MGT	0x008
#define PRCM_SIAMMDSPCLK_MGT	0x00C
#define PRCM_SGACLK_MGT		0x014
#define PRCM_UARTCLK_MGT	0x018
#define PRCM_MSP02CLK_MGT	0x01C
#define PRCM_MSP1CLK_MGT	0x288
#define PRCM_I2CCLK_MGT		0x020
#define PRCM_SDMMCCLK_MGT	0x024
#define PRCM_SLIMCLK_MGT	0x028
#define PRCM_PER1CLK_MGT	0x02C
#define PRCM_PER2CLK_MGT	0x030
#define PRCM_PER3CLK_MGT	0x034
#define PRCM_PER5CLK_MGT	0x038
#define PRCM_PER6CLK_MGT	0x03C
#define PRCM_PER7CLK_MGT	0x040
#define PRCM_LCDCLK_MGT		0x044
#define PRCM_BMLCLK_MGT		0x04C
#define PRCM_HSITXCLK_MGT	0x050
#define PRCM_HSIRXCLK_MGT	0x054
#define PRCM_HDMICLK_MGT	0x058
#define PRCM_APEATCLK_MGT	0x05C
#define PRCM_APETRACECLK_MGT	0x060
#define PRCM_MCDECLK_MGT	0x064
#define PRCM_IPI2CCLK_MGT	0x068
#define PRCM_DSIALTCLK_MGT	0x06C
#define PRCM_DMACLK_MGT		0x074
#define PRCM_B2R2CLK_MGT	0x078
#define PRCM_TVCLK_MGT		0x07C
#define PRCM_TCR		0x1C8
#define PRCM_TCR_STOPPED	(1 << 16)
#define PRCM_TCR_DOZE_MODE	(1 << 17)
#define PRCM_UNIPROCLK_MGT	0x278
#define PRCM_SSPCLK_MGT		0x280
#define PRCM_RNGCLK_MGT		0x284
#define PRCM_UICCCLK_MGT	0x27C

#define PRCM_MGT_ENABLE		(1 << 8)

static DEFINE_SPINLOCK(clocks_lock);

static void __clk_enable(struct clk *clk)
{
	if (clk->enabled++ == 0) {
		if (clk->parent_cluster)
			__clk_enable(clk->parent_cluster);

		if (clk->parent_periph)
			__clk_enable(clk->parent_periph);

		if (clk->ops && clk->ops->enable)
			clk->ops->enable(clk);
	}
}

int clk_enable(struct clk *clk)
{
	unsigned long flags;

	spin_lock_irqsave(&clocks_lock, flags);
	__clk_enable(clk);
	spin_unlock_irqrestore(&clocks_lock, flags);

	return 0;
}
EXPORT_SYMBOL(clk_enable);

static void __clk_disable(struct clk *clk)
{
	if (--clk->enabled == 0) {
		if (clk->ops && clk->ops->disable)
			clk->ops->disable(clk);

		if (clk->parent_periph)
			__clk_disable(clk->parent_periph);

		if (clk->parent_cluster)
			__clk_disable(clk->parent_cluster);
	}
}

void clk_disable(struct clk *clk)
{
	unsigned long flags;

	WARN_ON(!clk->enabled);

	spin_lock_irqsave(&clocks_lock, flags);
	__clk_disable(clk);
	spin_unlock_irqrestore(&clocks_lock, flags);
}
EXPORT_SYMBOL(clk_disable);

/*
 * The MTU has a separate, rather complex muxing setup
 * with alternative parents (peripheral cluster or
 * ULP or fixed 32768 Hz) depending on settings
 */
static unsigned long clk_mtu_get_rate(struct clk *clk)
{
	void __iomem *addr;
	u32 tcr;
	int mtu = (int) clk->data;
	/*
	 * One of these is selected eventually
	 * TODO: Replace the constant with a reference
	 * to the ULP source once this is modeled.
	 */
	unsigned long clk32k = 32768;
	unsigned long mturate;
	unsigned long retclk;

	if (cpu_is_u8500())
		addr = __io_address(U8500_PRCMU_BASE);
	else
		ux500_unknown_soc();

	/*
	 * On a startup, always conifgure the TCR to the doze mode;
	 * bootloaders do it for us. Do this in the kernel too.
	 */
	writel(PRCM_TCR_DOZE_MODE, addr + PRCM_TCR);

	tcr = readl(addr + PRCM_TCR);

	/* Get the rate from the parent as a default */
	if (clk->parent_periph)
		mturate = clk_get_rate(clk->parent_periph);
	else if (clk->parent_cluster)
		mturate = clk_get_rate(clk->parent_cluster);
	else
		/* We need to be connected SOMEWHERE */
		BUG();

	/* Return the clock selected for this MTU */
	if (tcr & (1 << mtu))
		retclk = clk32k;
	else
		retclk = mturate;

	pr_info("MTU%d clock rate: %lu Hz\n", mtu, retclk);
	return retclk;
}

unsigned long clk_get_rate(struct clk *clk)
{
	unsigned long rate;

	/*
	 * If there is a custom getrate callback for this clock,
	 * it will take precedence.
	 */
	if (clk->get_rate)
		return clk->get_rate(clk);

	if (clk->ops && clk->ops->get_rate)
		return clk->ops->get_rate(clk);

	rate = clk->rate;
	if (!rate) {
		if (clk->parent_periph)
			rate = clk_get_rate(clk->parent_periph);
		else if (clk->parent_cluster)
			rate = clk_get_rate(clk->parent_cluster);
	}

	return rate;
}
EXPORT_SYMBOL(clk_get_rate);

long clk_round_rate(struct clk *clk, unsigned long rate)
{
	/*TODO*/
	return rate;
}
EXPORT_SYMBOL(clk_round_rate);

int clk_set_rate(struct clk *clk, unsigned long rate)
{
	clk->rate = rate;
	return 0;
}
EXPORT_SYMBOL(clk_set_rate);

int clk_set_parent(struct clk *clk, struct clk *parent)
{
	/*TODO*/
	return -ENOSYS;
}
EXPORT_SYMBOL(clk_set_parent);

static void clk_prcmu_enable(struct clk *clk)
{
	void __iomem *cg_set_reg = __io_address(U8500_PRCMU_BASE)
				   + PRCM_YYCLKEN0_MGT_SET + clk->prcmu_cg_off;

	writel(1 << clk->prcmu_cg_bit, cg_set_reg);
}

static void clk_prcmu_disable(struct clk *clk)
{
	void __iomem *cg_clr_reg = __io_address(U8500_PRCMU_BASE)
				   + PRCM_YYCLKEN0_MGT_CLR + clk->prcmu_cg_off;

	writel(1 << clk->prcmu_cg_bit, cg_clr_reg);
}

static struct clkops clk_prcmu_ops = {
	.enable = clk_prcmu_enable,
	.disable = clk_prcmu_disable,
};

static unsigned int clkrst_base[] = {
	[1] = U8500_CLKRST1_BASE,
	[2] = U8500_CLKRST2_BASE,
	[3] = U8500_CLKRST3_BASE,
	[5] = U8500_CLKRST5_BASE,
	[6] = U8500_CLKRST6_BASE,
};

static void clk_prcc_enable(struct clk *clk)
{
	void __iomem *addr = __io_address(clkrst_base[clk->cluster]);

	if (clk->prcc_kernel != -1)
		writel(1 << clk->prcc_kernel, addr + PRCC_KCKEN);

	if (clk->prcc_bus != -1)
		writel(1 << clk->prcc_bus, addr + PRCC_PCKEN);
}

static void clk_prcc_disable(struct clk *clk)
{
	void __iomem *addr = __io_address(clkrst_base[clk->cluster]);

	if (clk->prcc_bus != -1)
		writel(1 << clk->prcc_bus, addr + PRCC_PCKDIS);

	if (clk->prcc_kernel != -1)
		writel(1 << clk->prcc_kernel, addr + PRCC_KCKDIS);
}

static struct clkops clk_prcc_ops = {
	.enable = clk_prcc_enable,
	.disable = clk_prcc_disable,
};

static struct clk clk_32khz = {
	.name =  "clk_32khz",
	.rate = 32000,
};

/*
 * PRCMU level clock gating
 */

/* Bank 0 */
static DEFINE_PRCMU_CLK(svaclk,		0x0, 2, SVAMMDSPCLK);
static DEFINE_PRCMU_CLK(siaclk,		0x0, 3, SIAMMDSPCLK);
static DEFINE_PRCMU_CLK(sgaclk,		0x0, 4, SGACLK);
static DEFINE_PRCMU_CLK_RATE(uartclk,	0x0, 5, UARTCLK, 38400000);
static DEFINE_PRCMU_CLK(msp02clk,	0x0, 6, MSP02CLK);
static DEFINE_PRCMU_CLK(msp1clk,	0x0, 7, MSP1CLK); /* v1 */
static DEFINE_PRCMU_CLK_RATE(i2cclk,	0x0, 8, I2CCLK, 48000000);
static DEFINE_PRCMU_CLK_RATE(sdmmcclk,	0x0, 9, SDMMCCLK, 100000000);
static DEFINE_PRCMU_CLK(slimclk,	0x0, 10, SLIMCLK);
static DEFINE_PRCMU_CLK(per1clk,	0x0, 11, PER1CLK);
static DEFINE_PRCMU_CLK(per2clk,	0x0, 12, PER2CLK);
static DEFINE_PRCMU_CLK(per3clk,	0x0, 13, PER3CLK);
static DEFINE_PRCMU_CLK(per5clk,	0x0, 14, PER5CLK);
static DEFINE_PRCMU_CLK_RATE(per6clk,	0x0, 15, PER6CLK, 133330000);
static DEFINE_PRCMU_CLK(lcdclk,		0x0, 17, LCDCLK);
static DEFINE_PRCMU_CLK(bmlclk,		0x0, 18, BMLCLK);
static DEFINE_PRCMU_CLK(hsitxclk,	0x0, 19, HSITXCLK);
static DEFINE_PRCMU_CLK(hsirxclk,	0x0, 20, HSIRXCLK);
static DEFINE_PRCMU_CLK(hdmiclk,	0x0, 21, HDMICLK);
static DEFINE_PRCMU_CLK(apeatclk,	0x0, 22, APEATCLK);
static DEFINE_PRCMU_CLK(apetraceclk,	0x0, 23, APETRACECLK);
static DEFINE_PRCMU_CLK(mcdeclk,	0x0, 24, MCDECLK);
static DEFINE_PRCMU_CLK(ipi2clk,	0x0, 25, IPI2CCLK);
static DEFINE_PRCMU_CLK(dsialtclk,	0x0, 26, DSIALTCLK); /* v1 */
static DEFINE_PRCMU_CLK(dmaclk,		0x0, 27, DMACLK);
static DEFINE_PRCMU_CLK(b2r2clk,	0x0, 28, B2R2CLK);
static DEFINE_PRCMU_CLK(tvclk,		0x0, 29, TVCLK);
static DEFINE_PRCMU_CLK(uniproclk,	0x0, 30, UNIPROCLK); /* v1 */
static DEFINE_PRCMU_CLK_RATE(sspclk,	0x0, 31, SSPCLK, 48000000); /* v1 */

/* Bank 1 */
static DEFINE_PRCMU_CLK(rngclk,		0x4, 0, RNGCLK); /* v1 */
static DEFINE_PRCMU_CLK(uiccclk,	0x4, 1, UICCCLK); /* v1 */

/*
 * PRCC level clock gating
 * Format: per#, clk, PCKEN bit, KCKEN bit, parent
 */

/* Peripheral Cluster #1 */
static DEFINE_PRCC_CLK(1, i2c4,		10, 9, &clk_i2cclk);
static DEFINE_PRCC_CLK(1, gpio0,	9, -1, NULL);
static DEFINE_PRCC_CLK(1, slimbus0,	8,  8, &clk_slimclk);
static DEFINE_PRCC_CLK(1, spi3,		7, -1, NULL);
static DEFINE_PRCC_CLK(1, i2c2,		6,  6, &clk_i2cclk);
static DEFINE_PRCC_CLK(1, sdi0,		5,  5, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(1, msp1,		4,  4, &clk_msp1clk);
static DEFINE_PRCC_CLK(1, msp0,		3,  3, &clk_msp02clk);
static DEFINE_PRCC_CLK(1, i2c1,		2,  2, &clk_i2cclk);
static DEFINE_PRCC_CLK(1, uart1,	1,  1, &clk_uartclk);
static DEFINE_PRCC_CLK(1, uart0,	0,  0, &clk_uartclk);

/* Peripheral Cluster #2 */
static DEFINE_PRCC_CLK(2, gpio1,	11, -1, NULL);
static DEFINE_PRCC_CLK(2, ssitx,	10,  7, NULL);
static DEFINE_PRCC_CLK(2, ssirx,	 9,  6, NULL);
static DEFINE_PRCC_CLK(2, spi0,		8, -1, NULL);
static DEFINE_PRCC_CLK(2, sdi3,		7,  5, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(2, sdi1,		6,  4, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(2, msp2,		5,  3, &clk_msp02clk);
static DEFINE_PRCC_CLK(2, sdi4,		4,  2, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(2, pwl,		3,  1, NULL);
static DEFINE_PRCC_CLK(2, spi1,		2, -1, NULL);
static DEFINE_PRCC_CLK(2, spi2,		1, -1, NULL);
static DEFINE_PRCC_CLK(2, i2c3,		0,  0, &clk_i2cclk);

/* Peripheral Cluster #3 */
static DEFINE_PRCC_CLK(3, gpio2,	8, -1, NULL);
static DEFINE_PRCC_CLK(3, sdi5,		7,  7, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(3, uart2,	6,  6, &clk_uartclk);
static DEFINE_PRCC_CLK(3, ske,		5,  5, &clk_32khz);
static DEFINE_PRCC_CLK(3, sdi2,		4,  4, &clk_sdmmcclk);
static DEFINE_PRCC_CLK(3, i2c0,		3,  3, &clk_i2cclk);
static DEFINE_PRCC_CLK(3, ssp1,		2,  2, &clk_sspclk);
static DEFINE_PRCC_CLK(3, ssp0,		1,  1, &clk_sspclk);
static DEFINE_PRCC_CLK(3, fsmc,		0, -1, NULL);

/* Peripheral Cluster #4 is in the always on domain */

/* Peripheral Cluster #5 */
static DEFINE_PRCC_CLK(5, gpio3,	1, -1, NULL);
static DEFINE_PRCC_CLK(5, usb,		0,  0, NULL);

/* Peripheral Cluster #6 */

/* MTU ID in data */
static DEFINE_PRCC_CLK_CUSTOM(6, mtu1, 8, -1, NULL, clk_mtu_get_rate, 1);
static DEFINE_PRCC_CLK_CUSTOM(6, mtu0, 7, -1, NULL, clk_mtu_get_rate, 0);
static DEFINE_PRCC_CLK(6, cfgreg,	6,  6, NULL);
static DEFINE_PRCC_CLK(6, hash1,	5, -1, NULL);
static DEFINE_PRCC_CLK(6, unipro,	4,  1, &clk_uniproclk);
static DEFINE_PRCC_CLK(6, pka,		3, -1, NULL);
static DEFINE_PRCC_CLK(6, hash0,	2, -1, NULL);
static DEFINE_PRCC_CLK(6, cryp0,	1, -1, NULL);
static DEFINE_PRCC_CLK(6, rng,	0,  0, &clk_rngclk);

static struct clk clk_dummy_apb_pclk = {
	.name = "apb_pclk",
};

static struct clk_lookup u8500_clks[] = {
	CLK(dummy_apb_pclk, NULL,	"apb_pclk"),

	/* Peripheral Cluster #1 */
	CLK(gpio0,	"gpio.0",	NULL),
	CLK(gpio0,	"gpio.1",	NULL),
	CLK(slimbus0,	"slimbus0",	NULL),
	CLK(i2c2,	"nmk-i2c.2",	NULL),
	CLK(sdi0,	"sdi0",		NULL),
	CLK(msp0,	"msp0",		NULL),
	CLK(i2c1,	"nmk-i2c.1",	NULL),
	CLK(uart1,	"uart1",	NULL),
	CLK(uart0,	"uart0",	NULL),

	/* Peripheral Cluster #3 */
	CLK(gpio2,	"gpio.2",	NULL),
	CLK(gpio2,	"gpio.3",	NULL),
	CLK(gpio2,	"gpio.4",	NULL),
	CLK(gpio2,	"gpio.5",	NULL),
	CLK(sdi5,	"sdi5",		NULL),
	CLK(uart2,	"uart2",	NULL),
	CLK(ske,	"ske",		NULL),
	CLK(ske,	"nmk-ske-keypad",	NULL),
	CLK(sdi2,	"sdi2",		NULL),
	CLK(i2c0,	"nmk-i2c.0",	NULL),
	CLK(fsmc,	"fsmc",		NULL),

	/* Peripheral Cluster #5 */
	CLK(gpio3,	"gpio.8",	NULL),

	/* Peripheral Cluster #6 */
	CLK(hash1,	"hash1",	NULL),
	CLK(pka,	"pka",		NULL),
	CLK(hash0,	"hash0",	NULL),
	CLK(cryp0,	"cryp0",	NULL),

	/* PRCMU level clock gating */

	/* Bank 0 */
	CLK(svaclk,	"sva",		NULL),
	CLK(siaclk,	"sia",		NULL),
	CLK(sgaclk,	"sga",		NULL),
	CLK(slimclk,	"slim",		NULL),
	CLK(lcdclk,	"lcd",		NULL),
	CLK(bmlclk,	"bml",		NULL),
	CLK(hsitxclk,	"stm-hsi.0",	NULL),
	CLK(hsirxclk,	"stm-hsi.1",	NULL),
	CLK(hdmiclk,	"hdmi",		NULL),
	CLK(apeatclk,	"apeat",	NULL),
	CLK(apetraceclk,	"apetrace",	NULL),
	CLK(mcdeclk,	"mcde",		NULL),
	CLK(ipi2clk,	"ipi2",		NULL),
	CLK(dmaclk,	"dma40.0",	NULL),
	CLK(b2r2clk,	"b2r2",		NULL),
	CLK(tvclk,	"tv",		NULL),

	/* Peripheral Cluster #1 */
	CLK(i2c4,	"nmk-i2c.4",	NULL),
	CLK(spi3,	"spi3",		NULL),
	CLK(msp1,	"msp1",		NULL),

	/* Peripheral Cluster #2 */
	CLK(gpio1,	"gpio.6",	NULL),
	CLK(gpio1,	"gpio.7",	NULL),
	CLK(ssitx,	"ssitx",	NULL),
	CLK(ssirx,	"ssirx",	NULL),
	CLK(spi0,	"spi0",		NULL),
	CLK(sdi3,	"sdi3",		NULL),
	CLK(sdi1,	"sdi1",		NULL),
	CLK(msp2,	"msp2",		NULL),
	CLK(sdi4,	"sdi4",		NULL),
	CLK(pwl,	"pwl",		NULL),
	CLK(spi1,	"spi1",		NULL),
	CLK(spi2,	"spi2",		NULL),
	CLK(i2c3,	"nmk-i2c.3",	NULL),

	/* Peripheral Cluster #3 */
	CLK(ssp1,	"ssp1",		NULL),
	CLK(ssp0,	"ssp0",		NULL),

	/* Peripheral Cluster #5 */
	CLK(usb,	"musb-ux500.0",	"usb"),

	/* Peripheral Cluster #6 */
	CLK(mtu1,	"mtu1",		NULL),
	CLK(mtu0,	"mtu0",		NULL),
	CLK(cfgreg,	"cfgreg",	NULL),
	CLK(hash1,	"hash1",	NULL),
	CLK(unipro,	"unipro",	NULL),
	CLK(rng,	"rng",		NULL),

	/* PRCMU level clock gating */

	/* Bank 0 */
	CLK(uniproclk,	"uniproclk",	NULL),
	CLK(dsialtclk,	"dsialt",	NULL),

	/* Bank 1 */
	CLK(rngclk,	"rng",		NULL),
	CLK(uiccclk,	"uicc",		NULL),
};

#ifdef CONFIG_DEBUG_FS
/*
 *	debugfs support to trace clock tree hierarchy and attributes with
 *	powerdebug
 */
static struct dentry *clk_debugfs_root;

void __init clk_debugfs_add_table(struct clk_lookup *cl, size_t num)
{
	while (num--) {
		/* Check that the clock has not been already registered */
		if (!(cl->clk->list.prev != cl->clk->list.next))
			list_add_tail(&cl->clk->list, &clk_list);

		cl++;
	}
}

static ssize_t usecount_dbg_read(struct file *file, char __user *buf,
						  size_t size, loff_t *off)
{
	struct clk *clk = file->f_dentry->d_inode->i_private;
	char cusecount[128];
	unsigned int len;

	len = sprintf(cusecount, "%u\n", clk->enabled);
	return simple_read_from_buffer(buf, size, off, cusecount, len);
}

static ssize_t rate_dbg_read(struct file *file, char __user *buf,
					  size_t size, loff_t *off)
{
	struct clk *clk = file->f_dentry->d_inode->i_private;
	char crate[128];
	unsigned int rate;
	unsigned int len;

	rate = clk_get_rate(clk);
	len = sprintf(crate, "%u\n", rate);
	return simple_read_from_buffer(buf, size, off, crate, len);
}

static const struct file_operations usecount_fops = {
	.read = usecount_dbg_read,
};

static const struct file_operations set_rate_fops = {
	.read = rate_dbg_read,
};

static struct dentry *clk_debugfs_register_dir(struct clk *c,
						struct dentry *p_dentry)
{
	struct dentry *d, *clk_d;
	const char *p = c->name;

	if (!p)
		p = "BUG";

	clk_d = debugfs_create_dir(p, p_dentry);
	if (!clk_d)
		return NULL;

	d = debugfs_create_file("usecount", S_IRUGO,
				clk_d, c, &usecount_fops);
	if (!d)
		goto err_out;
	d = debugfs_create_file("rate", S_IRUGO,
				clk_d, c, &set_rate_fops);
	if (!d)
		goto err_out;
	/*
	 * TODO : not currently available in ux500
	 * d = debugfs_create_x32("flags", S_IRUGO, clk_d, (u32 *)&c->flags);
	 * if (!d)
	 *	goto err_out;
	 */

	return clk_d;

err_out:
	debugfs_remove_recursive(clk_d);
	return NULL;
}

static int clk_debugfs_register_one(struct clk *c)
{
	struct clk *pa = c->parent_periph;
	struct clk *bpa = c->parent_cluster;

	if (!(bpa && !pa)) {
		c->dent = clk_debugfs_register_dir(c,
				pa ? pa->dent : clk_debugfs_root);
		if (!c->dent)
			return -ENOMEM;
	}

	if (bpa) {
		c->dent_bus = clk_debugfs_register_dir(c,
				bpa->dent_bus ? bpa->dent_bus : bpa->dent);
		if ((!c->dent_bus) &&  (c->dent)) {
			debugfs_remove_recursive(c->dent);
			c->dent = NULL;
			return -ENOMEM;
		}
	}
	return 0;
}

static int clk_debugfs_register(struct clk *c)
{
	int err;
	struct clk *pa = c->parent_periph;
	struct clk *bpa = c->parent_cluster;

	if (pa && (!pa->dent && !pa->dent_bus)) {
		err = clk_debugfs_register(pa);
		if (err)
			return err;
	}

	if (bpa && (!bpa->dent && !bpa->dent_bus)) {
		err = clk_debugfs_register(bpa);
		if (err)
			return err;
	}

	if ((!c->dent) && (!c->dent_bus)) {
		err = clk_debugfs_register_one(c);
		if (err)
			return err;
	}
	return 0;
}

static int __init clk_debugfs_init(void)
{
	struct clk *c;
	struct dentry *d;
	int err;

	d = debugfs_create_dir("clock", NULL);
	if (!d)
		return -ENOMEM;
	clk_debugfs_root = d;

	list_for_each_entry(c, &clk_list, list) {
		err = clk_debugfs_register(c);
		if (err)
			goto err_out;
	}
	return 0;
err_out:
	debugfs_remove_recursive(clk_debugfs_root);
	return err;
}

late_initcall(clk_debugfs_init);
#endif /* defined(CONFIG_DEBUG_FS) */

unsigned long clk_smp_twd_rate = 500000000;

unsigned long clk_smp_twd_get_rate(struct clk *clk)
{
	return clk_smp_twd_rate;
}

static struct clk clk_smp_twd = {
	.get_rate = clk_smp_twd_get_rate,
	.name =  "smp_twd",
};

static struct clk_lookup clk_smp_twd_lookup = {
	.dev_id = "smp_twd",
	.clk = &clk_smp_twd,
};

#ifdef CONFIG_CPU_FREQ

static int clk_twd_cpufreq_transition(struct notifier_block *nb,
				      unsigned long state, void *data)
{
	struct cpufreq_freqs *f = data;

	if (state == CPUFREQ_PRECHANGE) {
		/* Save frequency in simple Hz */
		clk_smp_twd_rate = (f->new * 1000) / 2;
	}

	return NOTIFY_OK;
}

static struct notifier_block clk_twd_cpufreq_nb = {
	.notifier_call = clk_twd_cpufreq_transition,
};

static int clk_init_smp_twd_cpufreq(void)
{
	return cpufreq_register_notifier(&clk_twd_cpufreq_nb,
				  CPUFREQ_TRANSITION_NOTIFIER);
}
late_initcall(clk_init_smp_twd_cpufreq);

#endif

int __init clk_init(void)
{
	clkdev_add_table(u8500_clks, ARRAY_SIZE(u8500_clks));
	clkdev_add(&clk_smp_twd_lookup);

#ifdef CONFIG_DEBUG_FS
	clk_debugfs_add_table(u8500_clks, ARRAY_SIZE(u8500_clks));
#endif
	return 0;
}