aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-s3c64xx/clock.c
blob: 8cf39e33579e3bb9c7d30eceb6afcaa5914e6d2c (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
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
/* linux/arch/arm/plat-s3c64xx/clock.c
 *
 * Copyright 2008 Openmoko, Inc.
 * Copyright 2008 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *	http://armlinux.simtec.co.uk/
 *
 * S3C64XX Base clock support
 *
 * 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/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <mach/map.h>

#include <mach/regs-sys.h>
#include <mach/regs-clock.h>
#include <mach/pll.h>

#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/cpu-freq.h>
#include <plat/clock.h>
#include <plat/clock-clksrc.h>

/* fin_apll, fin_mpll and fin_epll are all the same clock, which we call
 * ext_xtal_mux for want of an actual name from the manual.
*/

static struct clk clk_ext_xtal_mux = {
	.name		= "ext_xtal",
};

#define clk_fin_apll clk_ext_xtal_mux
#define clk_fin_mpll clk_ext_xtal_mux
#define clk_fin_epll clk_ext_xtal_mux

#define clk_fout_mpll	clk_mpll
#define clk_fout_epll	clk_epll

struct clk clk_h2 = {
	.name		= "hclk2",
	.rate		= 0,
};

struct clk clk_27m = {
	.name		= "clk_27m",
	.rate		= 27000000,
};

static int clk_48m_ctrl(struct clk *clk, int enable)
{
	unsigned long flags;
	u32 val;

	/* can't rely on clock lock, this register has other usages */
	local_irq_save(flags);

	val = __raw_readl(S3C64XX_OTHERS);
	if (enable)
		val |= S3C64XX_OTHERS_USBMASK;
	else
		val &= ~S3C64XX_OTHERS_USBMASK;

	__raw_writel(val, S3C64XX_OTHERS);
	local_irq_restore(flags);

	return 0;
}

struct clk clk_48m = {
	.name		= "clk_48m",
	.rate		= 48000000,
	.enable		= clk_48m_ctrl,
};

struct clk clk_xusbxti = {
	.name		= "xusbxti",
	.rate		= 48000000,
};

static int inline s3c64xx_gate(void __iomem *reg,
				struct clk *clk,
				int enable)
{
	unsigned int ctrlbit = clk->ctrlbit;
	u32 con;

	con = __raw_readl(reg);

	if (enable)
		con |= ctrlbit;
	else
		con &= ~ctrlbit;

	__raw_writel(con, reg);
	return 0;
}

static int s3c64xx_pclk_ctrl(struct clk *clk, int enable)
{
	return s3c64xx_gate(S3C_PCLK_GATE, clk, enable);
}

static int s3c64xx_hclk_ctrl(struct clk *clk, int enable)
{
	return s3c64xx_gate(S3C_HCLK_GATE, clk, enable);
}

int s3c64xx_sclk_ctrl(struct clk *clk, int enable)
{
	return s3c64xx_gate(S3C_SCLK_GATE, clk, enable);
}

static struct clk init_clocks_off[] = {
	{
		.name		= "nand",
		.parent		= &clk_h,
	}, {
		.name		= "rtc",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_RTC,
	}, {
		.name		= "adc",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_TSADC,
	}, {
		.name		= "i2c",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_IIC,
	}, {
		.name		= "i2c",
		.devname	= "s3c2440-i2c.1",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C6410_CLKCON_PCLK_I2C1,
	}, {
		.name		= "iis",
		.devname	= "samsung-i2s.0",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_IIS0,
	}, {
		.name		= "iis",
		.devname	= "samsung-i2s.1",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_IIS1,
	}, {
#ifdef CONFIG_CPU_S3C6410
		.name		= "iis",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C6410_CLKCON_PCLK_IIS2,
	}, {
#endif
		.name		= "keypad",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_KEYPAD,
	}, {
		.name		= "spi",
		.devname	= "s3c64xx-spi.0",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_SPI0,
	}, {
		.name		= "spi",
		.devname	= "s3c64xx-spi.1",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_SPI1,
	}, {
		.name		= "spi_48m",
		.devname	= "s3c64xx-spi.0",
		.parent		= &clk_48m,
		.enable		= s3c64xx_sclk_ctrl,
		.ctrlbit	= S3C_CLKCON_SCLK_SPI0_48,
	}, {
		.name		= "spi_48m",
		.devname	= "s3c64xx-spi.1",
		.parent		= &clk_48m,
		.enable		= s3c64xx_sclk_ctrl,
		.ctrlbit	= S3C_CLKCON_SCLK_SPI1_48,
	}, {
		.name		= "48m",
		.devname	= "s3c-sdhci.0",
		.parent		= &clk_48m,
		.enable		= s3c64xx_sclk_ctrl,
		.ctrlbit	= S3C_CLKCON_SCLK_MMC0_48,
	}, {
		.name		= "48m",
		.devname	= "s3c-sdhci.1",
		.parent		= &clk_48m,
		.enable		= s3c64xx_sclk_ctrl,
		.ctrlbit	= S3C_CLKCON_SCLK_MMC1_48,
	}, {
		.name		= "48m",
		.devname	= "s3c-sdhci.2",
		.parent		= &clk_48m,
		.enable		= s3c64xx_sclk_ctrl,
		.ctrlbit	= S3C_CLKCON_SCLK_MMC2_48,
	}, {
		.name		= "dma0",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_DMA0,
	}, {
		.name		= "dma1",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_DMA1,
	},
};

static struct clk init_clocks[] = {
	{
		.name		= "lcd",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_LCD,
	}, {
		.name		= "gpio",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_GPIO,
	}, {
		.name		= "usb-host",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_UHOST,
	}, {
		.name		= "hsmmc",
		.devname	= "s3c-sdhci.0",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_HSMMC0,
	}, {
		.name		= "hsmmc",
		.devname	= "s3c-sdhci.1",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_HSMMC1,
	}, {
		.name		= "hsmmc",
		.devname	= "s3c-sdhci.2",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_HSMMC2,
	}, {
		.name		= "otg",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_USB,
	}, {
		.name		= "timers",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_PWM,
	}, {
		.name		= "uart",
		.devname	= "s3c6400-uart.0",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_UART0,
	}, {
		.name		= "uart",
		.devname	= "s3c6400-uart.1",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_UART1,
	}, {
		.name		= "uart",
		.devname	= "s3c6400-uart.2",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_UART2,
	}, {
		.name		= "uart",
		.devname	= "s3c6400-uart.3",
		.parent		= &clk_p,
		.enable		= s3c64xx_pclk_ctrl,
		.ctrlbit	= S3C_CLKCON_PCLK_UART3,
	}, {
		.name		= "watchdog",
		.parent		= &clk_p,
		.ctrlbit	= S3C_CLKCON_PCLK_WDT,
	}, {
		.name		= "ac97",
		.parent		= &clk_p,
		.ctrlbit	= S3C_CLKCON_PCLK_AC97,
	}, {
		.name		= "cfcon",
		.parent		= &clk_h,
		.enable		= s3c64xx_hclk_ctrl,
		.ctrlbit	= S3C_CLKCON_HCLK_IHOST,
	}
};


static struct clk clk_fout_apll = {
	.name		= "fout_apll",
};

static struct clk *clk_src_apll_list[] = {
	[0] = &clk_fin_apll,
	[1] = &clk_fout_apll,
};

static struct clksrc_sources clk_src_apll = {
	.sources	= clk_src_apll_list,
	.nr_sources	= ARRAY_SIZE(clk_src_apll_list),
};

static struct clksrc_clk clk_mout_apll = {
	.clk	= {
		.name		= "mout_apll",
	},
	.reg_src	= { .reg = S3C_CLK_SRC, .shift = 0, .size = 1  },
	.sources	= &clk_src_apll,
};

static struct clk *clk_src_epll_list[] = {
	[0] = &clk_fin_epll,
	[1] = &clk_fout_epll,
};

static struct clksrc_sources clk_src_epll = {
	.sources	= clk_src_epll_list,
	.nr_sources	= ARRAY_SIZE(clk_src_epll_list),
};

static struct clksrc_clk clk_mout_epll = {
	.clk	= {
		.name		= "mout_epll",
	},
	.reg_src	= { .reg = S3C_CLK_SRC, .shift = 2, .size = 1  },
	.sources	= &clk_src_epll,
};

static struct clk *clk_src_mpll_list[] = {
	[0] = &clk_fin_mpll,
	[1] = &clk_fout_mpll,
};

static struct clksrc_sources clk_src_mpll = {
	.sources	= clk_src_mpll_list,
	.nr_sources	= ARRAY_SIZE(clk_src_mpll_list),
};

static struct clksrc_clk clk_mout_mpll = {
	.clk = {
		.name		= "mout_mpll",
	},
	.reg_src	= { .reg = S3C_CLK_SRC, .shift = 1, .size = 1  },
	.sources	= &clk_src_mpll,
};

static unsigned int armclk_mask;

static unsigned long s3c64xx_clk_arm_get_rate(struct clk *clk)
{
	unsigned long rate = clk_get_rate(clk->parent);
	u32 clkdiv;

	/* divisor mask starts at bit0, so no need to shift */
	clkdiv = __raw_readl(S3C_CLK_DIV0) & armclk_mask;

	return rate / (clkdiv + 1);
}

static unsigned long s3c64xx_clk_arm_round_rate(struct clk *clk,
						unsigned long rate)
{
	unsigned long parent = clk_get_rate(clk->parent);
	u32 div;

	if (parent < rate)
		return parent;

	div = (parent / rate) - 1;
	if (div > armclk_mask)
		div = armclk_mask;

	return parent / (div + 1);
}

static int s3c64xx_clk_arm_set_rate(struct clk *clk, unsigned long rate)
{
	unsigned long parent = clk_get_rate(clk->parent);
	u32 div;
	u32 val;

	if (rate < parent / (armclk_mask + 1))
		return -EINVAL;

	rate = clk_round_rate(clk, rate);
	div = clk_get_rate(clk->parent) / rate;

	val = __raw_readl(S3C_CLK_DIV0);
	val &= ~armclk_mask;
	val |= (div - 1);
	__raw_writel(val, S3C_CLK_DIV0);

	return 0;

}

static struct clk clk_arm = {
	.name		= "armclk",
	.parent		= &clk_mout_apll.clk,
	.ops		= &(struct clk_ops) {
		.get_rate	= s3c64xx_clk_arm_get_rate,
		.set_rate	= s3c64xx_clk_arm_set_rate,
		.round_rate	= s3c64xx_clk_arm_round_rate,
	},
};

static unsigned long s3c64xx_clk_doutmpll_get_rate(struct clk *clk)
{
	unsigned long rate = clk_get_rate(clk->parent);

	printk(KERN_DEBUG "%s: parent is %ld\n", __func__, rate);

	if (__raw_readl(S3C_CLK_DIV0) & S3C6400_CLKDIV0_MPLL_MASK)
		rate /= 2;

	return rate;
}

static struct clk_ops clk_dout_ops = {
	.get_rate	= s3c64xx_clk_doutmpll_get_rate,
};

static struct clk clk_dout_mpll = {
	.name		= "dout_mpll",
	.parent		= &clk_mout_mpll.clk,
	.ops		= &clk_dout_ops,
};

static struct clk *clkset_spi_mmc_list[] = {
	&clk_mout_epll.clk,
	&clk_dout_mpll,
	&clk_fin_epll,
	&clk_27m,
};

static struct clksrc_sources clkset_spi_mmc = {
	.sources	= clkset_spi_mmc_list,
	.nr_sources	= ARRAY_SIZE(clkset_spi_mmc_list),
};

static struct clk *clkset_irda_list[] = {
	&clk_mout_epll.clk,
	&clk_dout_mpll,
	NULL,
	&clk_27m,
};

static struct clksrc_sources clkset_irda = {
	.sources	= clkset_irda_list,
	.nr_sources	= ARRAY_SIZE(clkset_irda_list),
};

static struct clk *clkset_uart_list[] = {
	&clk_mout_epll.clk,
	&clk_dout_mpll,
	NULL,
	NULL
};

static struct clksrc_sources clkset_uart = {
	.sources	= clkset_uart_list,
	.nr_sources	= ARRAY_SIZE(clkset_uart_list),
};

static struct clk *clkset_uhost_list[] = {
	&clk_48m,
	&clk_mout_epll.clk,
	&clk_dout_mpll,
	&clk_fin_epll,
};

static struct clksrc_sources clkset_uhost = {
	.sources	= clkset_uhost_list,
	.nr_sources	= ARRAY_SIZE(clkset_uhost_list),
};

/* The peripheral clocks are all controlled via clocksource followed
 * by an optional divider and gate stage. We currently roll this into
 * one clock which hides the intermediate clock from the mux.
 *
 * Note, the JPEG clock can only be an even divider...
 *
 * The scaler and LCD clocks depend on the S3C64XX version, and also
 * have a common parent divisor so are not included here.
 */

/* clocks that feed other parts of the clock source tree */

static struct clk clk_iis_cd0 = {
	.name		= "iis_cdclk0",
};

static struct clk clk_iis_cd1 = {
	.name		= "iis_cdclk1",
};

static struct clk clk_iisv4_cd = {
	.name		= "iis_cdclk_v4",
};

static struct clk clk_pcm_cd = {
	.name		= "pcm_cdclk",
};

static struct clk *clkset_audio0_list[] = {
	[0] = &clk_mout_epll.clk,
	[1] = &clk_dout_mpll,
	[2] = &clk_fin_epll,
	[3] = &clk_iis_cd0,
	[4] = &clk_pcm_cd,
};

static struct clksrc_sources clkset_audio0 = {
	.sources	= clkset_audio0_list,
	.nr_sources	= ARRAY_SIZE(clkset_audio0_list),
};

static struct clk *clkset_audio1_list[] = {
	[0] = &clk_mout_epll.clk,
	[1] = &clk_dout_mpll,
	[2] = &clk_fin_epll,
	[3] = &clk_iis_cd1,
	[4] = &clk_pcm_cd,
};

static struct clksrc_sources clkset_audio1 = {
	.sources	= clkset_audio1_list,
	.nr_sources	= ARRAY_SIZE(clkset_audio1_list),
};

static struct clk *clkset_audio2_list[] = {
	[0] = &clk_mout_epll.clk,
	[1] = &clk_dout_mpll,
	[2] = &clk_fin_epll,
	[3] = &clk_iisv4_cd,
	[4] = &clk_pcm_cd,
};

static struct clksrc_sources clkset_audio2 = {
	.sources	= clkset_audio2_list,
	.nr_sources	= ARRAY_SIZE(clkset_audio2_list),
};

static struct clk *clkset_camif_list[] = {
	&clk_h2,
};

static struct clksrc_sources clkset_camif = {
	.sources	= clkset_camif_list,
	.nr_sources	= ARRAY_SIZE(clkset_camif_list),
};

static struct clksrc_clk clksrcs[] = {
	{
		.clk	= {
			.name		= "mmc_bus",
			.devname	= "s3c-sdhci.0",
			.ctrlbit        = S3C_CLKCON_SCLK_MMC0,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 18, .size = 2  },
		.reg_div	= { .reg = S3C_CLK_DIV1, .shift = 0, .size = 4  },
		.sources	= &clkset_spi_mmc,
	}, {
		.clk	= {
			.name		= "mmc_bus",
			.devname	= "s3c-sdhci.1",
			.ctrlbit        = S3C_CLKCON_SCLK_MMC1,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 20, .size = 2  },
		.reg_div	= { .reg = S3C_CLK_DIV1, .shift = 4, .size = 4  },
		.sources	= &clkset_spi_mmc,
	}, {
		.clk	= {
			.name		= "mmc_bus",
			.devname	= "s3c-sdhci.2",
			.ctrlbit        = S3C_CLKCON_SCLK_MMC2,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 22, .size = 2  },
		.reg_div 	= { .reg = S3C_CLK_DIV1, .shift = 8, .size = 4  },
		.sources	= &clkset_spi_mmc,
	}, {
		.clk	= {
			.name		= "usb-bus-host",
			.ctrlbit        = S3C_CLKCON_SCLK_UHOST,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src 	= { .reg = S3C_CLK_SRC, .shift = 5, .size = 2  },
		.reg_div	= { .reg = S3C_CLK_DIV1, .shift = 20, .size = 4  },
		.sources	= &clkset_uhost,
	}, {
		.clk	= {
			.name		= "uclk1",
			.ctrlbit        = S3C_CLKCON_SCLK_UART,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 13, .size = 1  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 16, .size = 4  },
		.sources	= &clkset_uart,
	}, {
/* Where does UCLK0 come from? */
		.clk	= {
			.name		= "spi-bus",
			.devname	= "s3c64xx-spi.0",
			.ctrlbit        = S3C_CLKCON_SCLK_SPI0,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 14, .size = 2  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 0, .size = 4  },
		.sources	= &clkset_spi_mmc,
	}, {
		.clk	= {
			.name		= "spi-bus",
			.devname	= "s3c64xx-spi.1",
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 16, .size = 2  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 4, .size = 4  },
		.sources	= &clkset_spi_mmc,
	}, {
		.clk	= {
			.name		= "audio-bus",
			.devname	= "samsung-i2s.0",
			.ctrlbit        = S3C_CLKCON_SCLK_AUDIO0,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 7, .size = 3  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 8, .size = 4  },
		.sources	= &clkset_audio0,
	}, {
		.clk	= {
			.name		= "audio-bus",
			.devname	= "samsung-i2s.1",
			.ctrlbit        = S3C_CLKCON_SCLK_AUDIO1,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 10, .size = 3  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 12, .size = 4  },
		.sources	= &clkset_audio1,
	}, {
		.clk	= {
			.name		= "audio-bus",
			.devname	= "samsung-i2s.2",
			.ctrlbit        = S3C6410_CLKCON_SCLK_AUDIO2,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C6410_CLK_SRC2, .shift = 0, .size = 3  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 24, .size = 4  },
		.sources	= &clkset_audio2,
	}, {
		.clk	= {
			.name		= "irda-bus",
			.ctrlbit        = S3C_CLKCON_SCLK_IRDA,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_src	= { .reg = S3C_CLK_SRC, .shift = 24, .size = 2  },
		.reg_div	= { .reg = S3C_CLK_DIV2, .shift = 20, .size = 4  },
		.sources	= &clkset_irda,
	}, {
		.clk	= {
			.name		= "camera",
			.ctrlbit        = S3C_CLKCON_SCLK_CAM,
			.enable		= s3c64xx_sclk_ctrl,
		},
		.reg_div	= { .reg = S3C_CLK_DIV0, .shift = 20, .size = 4  },
		.reg_src	= { .reg = NULL, .shift = 0, .size = 0  },
		.sources	= &clkset_camif,
	},
};

/* Clock initialisation code */

static struct clksrc_clk *init_parents[] = {
	&clk_mout_apll,
	&clk_mout_epll,
	&clk_mout_mpll,
};

#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)

void __init_or_cpufreq s3c6400_setup_clocks(void)
{
	struct clk *xtal_clk;
	unsigned long xtal;
	unsigned long fclk;
	unsigned long hclk;
	unsigned long hclk2;
	unsigned long pclk;
	unsigned long epll;
	unsigned long apll;
	unsigned long mpll;
	unsigned int ptr;
	u32 clkdiv0;

	printk(KERN_DEBUG "%s: registering clocks\n", __func__);

	clkdiv0 = __raw_readl(S3C_CLK_DIV0);
	printk(KERN_DEBUG "%s: clkdiv0 = %08x\n", __func__, clkdiv0);

	xtal_clk = clk_get(NULL, "xtal");
	BUG_ON(IS_ERR(xtal_clk));

	xtal = clk_get_rate(xtal_clk);
	clk_put(xtal_clk);

	printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);

	/* For now assume the mux always selects the crystal */
	clk_ext_xtal_mux.parent = xtal_clk;

	epll = s3c6400_get_epll(xtal);
	mpll = s3c6400_get_pll(xtal, __raw_readl(S3C_MPLL_CON));
	apll = s3c6400_get_pll(xtal, __raw_readl(S3C_APLL_CON));

	fclk = mpll;

	printk(KERN_INFO "S3C64XX: PLL settings, A=%ld, M=%ld, E=%ld\n",
	       apll, mpll, epll);

	hclk2 = mpll / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK2);
	hclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_HCLK);
	pclk = hclk2 / GET_DIV(clkdiv0, S3C6400_CLKDIV0_PCLK);

	printk(KERN_INFO "S3C64XX: HCLK2=%ld, HCLK=%ld, PCLK=%ld\n",
	       hclk2, hclk, pclk);

	clk_fout_mpll.rate = mpll;
	clk_fout_epll.rate = epll;
	clk_fout_apll.rate = apll;

	clk_h2.rate = hclk2;
	clk_h.rate = hclk;
	clk_p.rate = pclk;
	clk_f.rate = fclk;

	for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
		s3c_set_clksrc(init_parents[ptr], true);

	for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
		s3c_set_clksrc(&clksrcs[ptr], true);
}

static struct clk *clks1[] __initdata = {
	&clk_ext_xtal_mux,
	&clk_iis_cd0,
	&clk_iis_cd1,
	&clk_iisv4_cd,
	&clk_pcm_cd,
	&clk_mout_epll.clk,
	&clk_mout_mpll.clk,
	&clk_dout_mpll,
	&clk_arm,
};

static struct clk *clks[] __initdata = {
	&clk_ext,
	&clk_epll,
	&clk_27m,
	&clk_48m,
	&clk_h2,
	&clk_xusbxti,
};

/**
 * s3c64xx_register_clocks - register clocks for s3c6400 and s3c6410
 * @xtal: The rate for the clock crystal feeding the PLLs.
 * @armclk_divlimit: Divisor mask for ARMCLK.
 *
 * Register the clocks for the S3C6400 and S3C6410 SoC range, such
 * as ARMCLK as well as the necessary parent clocks.
 *
 * This call does not setup the clocks, which is left to the
 * s3c6400_setup_clocks() call which may be needed by the cpufreq
 * or resume code to re-set the clocks if the bootloader has changed
 * them.
 */
void __init s3c64xx_register_clocks(unsigned long xtal, 
				    unsigned armclk_divlimit)
{
	armclk_mask = armclk_divlimit;

	s3c24xx_register_baseclocks(xtal);
	s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));

	s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));

	s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
	s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));

	s3c24xx_register_clocks(clks1, ARRAY_SIZE(clks1));
	s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
	s3c_pwmclk_init();
}