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Add linux-next specific files for 20110831
[linux-2.6/next.git] / arch / arm / mach-mx5 / clock-mx51-mx53.c
blob2b9bd1fabaf91e98cda6f4f2ebae7d0a170805d9
1 /*
2 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
4 *
5 * The code contained herein is licensed under the GNU General Public
6 * License. You may obtain a copy of the GNU General Public License
7 * Version 2 or later at the following locations:
8 *
9 * http://www.opensource.org/licenses/gpl-license.html
10 * http://www.gnu.org/copyleft/gpl.html
11 */
12
13 #include <linux/mm.h>
14 #include <linux/delay.h>
15 #include <linux/clk.h>
16 #include <linux/io.h>
17 #include <linux/clkdev.h>
18
19 #include <asm/div64.h>
20
21 #include <mach/hardware.h>
22 #include <mach/common.h>
23 #include <mach/clock.h>
24
25 #include "crm_regs.h"
26
27 /* External clock values passed-in by the board code */
28 static unsigned long external_high_reference, external_low_reference;
29 static unsigned long oscillator_reference, ckih2_reference;
30
31 static struct clk osc_clk;
32 static struct clk pll1_main_clk;
33 static struct clk pll1_sw_clk;
34 static struct clk pll2_sw_clk;
35 static struct clk pll3_sw_clk;
36 static struct clk mx53_pll4_sw_clk;
37 static struct clk lp_apm_clk;
38 static struct clk periph_apm_clk;
39 static struct clk ahb_clk;
40 static struct clk ipg_clk;
41 static struct clk usboh3_clk;
42 static struct clk emi_fast_clk;
43 static struct clk ipu_clk;
44 static struct clk mipi_hsc1_clk;
45 static struct clk esdhc1_clk;
46 static struct clk esdhc2_clk;
47 static struct clk esdhc3_mx53_clk;
48
49 #define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */
50
51 /* calculate best pre and post dividers to get the required divider */
52 static void __calc_pre_post_dividers(u32 div, u32 *pre, u32 *post,
53 u32 max_pre, u32 max_post)
54 {
55 if (div >= max_pre * max_post) {
56 *pre = max_pre;
57 *post = max_post;
58 } else if (div >= max_pre) {
59 u32 min_pre, temp_pre, old_err, err;
60 min_pre = DIV_ROUND_UP(div, max_post);
61 old_err = max_pre;
62 for (temp_pre = max_pre; temp_pre >= min_pre; temp_pre--) {
63 err = div % temp_pre;
64 if (err == 0) {
65 *pre = temp_pre;
66 break;
67 }
68 err = temp_pre - err;
69 if (err < old_err) {
70 old_err = err;
71 *pre = temp_pre;
72 }
73 }
74 *post = DIV_ROUND_UP(div, *pre);
75 } else {
76 *pre = div;
77 *post = 1;
78 }
79 }
80
81 static void _clk_ccgr_setclk(struct clk *clk, unsigned mode)
82 {
83 u32 reg = __raw_readl(clk->enable_reg);
84
85 reg &= ~(MXC_CCM_CCGRx_CG_MASK << clk->enable_shift);
86 reg |= mode << clk->enable_shift;
87
88 __raw_writel(reg, clk->enable_reg);
89 }
90
91 static int _clk_ccgr_enable(struct clk *clk)
92 {
93 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_ON);
94 return 0;
95 }
96
97 static void _clk_ccgr_disable(struct clk *clk)
98 {
99 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_OFF);
100 }
101
102 static int _clk_ccgr_enable_inrun(struct clk *clk)
103 {
104 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_IDLE);
105 return 0;
106 }
107
108 static void _clk_ccgr_disable_inwait(struct clk *clk)
109 {
110 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_IDLE);
111 }
112
113 /*
114 * For the 4-to-1 muxed input clock
115 */
116 static inline u32 _get_mux(struct clk *parent, struct clk *m0,
117 struct clk *m1, struct clk *m2, struct clk *m3)
118 {
119 if (parent == m0)
120 return 0;
121 else if (parent == m1)
122 return 1;
123 else if (parent == m2)
124 return 2;
125 else if (parent == m3)
126 return 3;
127 else
128 BUG();
129
130 return -EINVAL;
131 }
132
133 static inline void __iomem *_mx51_get_pll_base(struct clk *pll)
134 {
135 if (pll == &pll1_main_clk)
136 return MX51_DPLL1_BASE;
137 else if (pll == &pll2_sw_clk)
138 return MX51_DPLL2_BASE;
139 else if (pll == &pll3_sw_clk)
140 return MX51_DPLL3_BASE;
141 else
142 BUG();
143
144 return NULL;
145 }
146
147 static inline void __iomem *_mx53_get_pll_base(struct clk *pll)
148 {
149 if (pll == &pll1_main_clk)
150 return MX53_DPLL1_BASE;
151 else if (pll == &pll2_sw_clk)
152 return MX53_DPLL2_BASE;
153 else if (pll == &pll3_sw_clk)
154 return MX53_DPLL3_BASE;
155 else if (pll == &mx53_pll4_sw_clk)
156 return MX53_DPLL4_BASE;
157 else
158 BUG();
159
160 return NULL;
161 }
162
163 static inline void __iomem *_get_pll_base(struct clk *pll)
164 {
165 if (cpu_is_mx51())
166 return _mx51_get_pll_base(pll);
167 else
168 return _mx53_get_pll_base(pll);
169 }
170
171 static unsigned long clk_pll_get_rate(struct clk *clk)
172 {
173 long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
174 unsigned long dp_op, dp_mfd, dp_mfn, dp_ctl, pll_hfsm, dbl;
175 void __iomem *pllbase;
176 s64 temp;
177 unsigned long parent_rate;
178
179 parent_rate = clk_get_rate(clk->parent);
180
181 pllbase = _get_pll_base(clk);
182
183 dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
184 pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
185 dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN;
186
187 if (pll_hfsm == 0) {
188 dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
189 dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
190 dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
191 } else {
192 dp_op = __raw_readl(pllbase + MXC_PLL_DP_HFS_OP);
193 dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFD);
194 dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFN);
195 }
196 pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
197 mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET;
198 mfi = (mfi <= 5) ? 5 : mfi;
199 mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
200 mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK;
201 /* Sign extend to 32-bits */
202 if (mfn >= 0x04000000) {
203 mfn |= 0xFC000000;
204 mfn_abs = -mfn;
205 }
206
207 ref_clk = 2 * parent_rate;
208 if (dbl != 0)
209 ref_clk *= 2;
210
211 ref_clk /= (pdf + 1);
212 temp = (u64) ref_clk * mfn_abs;
213 do_div(temp, mfd + 1);
214 if (mfn < 0)
215 temp = -temp;
216 temp = (ref_clk * mfi) + temp;
217
218 return temp;
219 }
220
221 static int _clk_pll_set_rate(struct clk *clk, unsigned long rate)
222 {
223 u32 reg;
224 void __iomem *pllbase;
225
226 long mfi, pdf, mfn, mfd = 999999;
227 s64 temp64;
228 unsigned long quad_parent_rate;
229 unsigned long pll_hfsm, dp_ctl;
230 unsigned long parent_rate;
231
232 parent_rate = clk_get_rate(clk->parent);
233
234 pllbase = _get_pll_base(clk);
235
236 quad_parent_rate = 4 * parent_rate;
237 pdf = mfi = -1;
238 while (++pdf < 16 && mfi < 5)
239 mfi = rate * (pdf+1) / quad_parent_rate;
240 if (mfi > 15)
241 return -EINVAL;
242 pdf--;
243
244 temp64 = rate * (pdf+1) - quad_parent_rate * mfi;
245 do_div(temp64, quad_parent_rate/1000000);
246 mfn = (long)temp64;
247
248 dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
249 /* use dpdck0_2 */
250 __raw_writel(dp_ctl | 0x1000L, pllbase + MXC_PLL_DP_CTL);
251 pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
252 if (pll_hfsm == 0) {
253 reg = mfi << 4 | pdf;
254 __raw_writel(reg, pllbase + MXC_PLL_DP_OP);
255 __raw_writel(mfd, pllbase + MXC_PLL_DP_MFD);
256 __raw_writel(mfn, pllbase + MXC_PLL_DP_MFN);
257 } else {
258 reg = mfi << 4 | pdf;
259 __raw_writel(reg, pllbase + MXC_PLL_DP_HFS_OP);
260 __raw_writel(mfd, pllbase + MXC_PLL_DP_HFS_MFD);
261 __raw_writel(mfn, pllbase + MXC_PLL_DP_HFS_MFN);
262 }
263
264 return 0;
265 }
266
267 static int _clk_pll_enable(struct clk *clk)
268 {
269 u32 reg;
270 void __iomem *pllbase;
271 int i = 0;
272
273 pllbase = _get_pll_base(clk);
274 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
275 if (reg & MXC_PLL_DP_CTL_UPEN)
276 return 0;
277
278 reg |= MXC_PLL_DP_CTL_UPEN;
279 __raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
280
281 /* Wait for lock */
282 do {
283 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
284 if (reg & MXC_PLL_DP_CTL_LRF)
285 break;
286
287 udelay(1);
288 } while (++i < MAX_DPLL_WAIT_TRIES);
289
290 if (i == MAX_DPLL_WAIT_TRIES) {
291 pr_err("MX5: pll locking failed\n");
292 return -EINVAL;
293 }
294
295 return 0;
296 }
297
298 static void _clk_pll_disable(struct clk *clk)
299 {
300 u32 reg;
301 void __iomem *pllbase;
302
303 pllbase = _get_pll_base(clk);
304 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) & ~MXC_PLL_DP_CTL_UPEN;
305 __raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
306 }
307
308 static int _clk_pll1_sw_set_parent(struct clk *clk, struct clk *parent)
309 {
310 u32 reg, step;
311
312 reg = __raw_readl(MXC_CCM_CCSR);
313
314 /* When switching from pll_main_clk to a bypass clock, first select a
315 * multiplexed clock in 'step_sel', then shift the glitchless mux
316 * 'pll1_sw_clk_sel'.
317 *
318 * When switching back, do it in reverse order
319 */
320 if (parent == &pll1_main_clk) {
321 /* Switch to pll1_main_clk */
322 reg &= ~MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
323 __raw_writel(reg, MXC_CCM_CCSR);
324 /* step_clk mux switched to lp_apm, to save power. */
325 reg = __raw_readl(MXC_CCM_CCSR);
326 reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
327 reg |= (MXC_CCM_CCSR_STEP_SEL_LP_APM <<
328 MXC_CCM_CCSR_STEP_SEL_OFFSET);
329 } else {
330 if (parent == &lp_apm_clk) {
331 step = MXC_CCM_CCSR_STEP_SEL_LP_APM;
332 } else if (parent == &pll2_sw_clk) {
333 step = MXC_CCM_CCSR_STEP_SEL_PLL2_DIVIDED;
334 } else if (parent == &pll3_sw_clk) {
335 step = MXC_CCM_CCSR_STEP_SEL_PLL3_DIVIDED;
336 } else
337 return -EINVAL;
338
339 reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
340 reg |= (step << MXC_CCM_CCSR_STEP_SEL_OFFSET);
341
342 __raw_writel(reg, MXC_CCM_CCSR);
343 /* Switch to step_clk */
344 reg = __raw_readl(MXC_CCM_CCSR);
345 reg |= MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
346 }
347 __raw_writel(reg, MXC_CCM_CCSR);
348 return 0;
349 }
350
351 static unsigned long clk_pll1_sw_get_rate(struct clk *clk)
352 {
353 u32 reg, div;
354 unsigned long parent_rate;
355
356 parent_rate = clk_get_rate(clk->parent);
357
358 reg = __raw_readl(MXC_CCM_CCSR);
359
360 if (clk->parent == &pll2_sw_clk) {
361 div = ((reg & MXC_CCM_CCSR_PLL2_PODF_MASK) >>
362 MXC_CCM_CCSR_PLL2_PODF_OFFSET) + 1;
363 } else if (clk->parent == &pll3_sw_clk) {
364 div = ((reg & MXC_CCM_CCSR_PLL3_PODF_MASK) >>
365 MXC_CCM_CCSR_PLL3_PODF_OFFSET) + 1;
366 } else
367 div = 1;
368 return parent_rate / div;
369 }
370
371 static int _clk_pll2_sw_set_parent(struct clk *clk, struct clk *parent)
372 {
373 u32 reg;
374
375 reg = __raw_readl(MXC_CCM_CCSR);
376
377 if (parent == &pll2_sw_clk)
378 reg &= ~MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
379 else
380 reg |= MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
381
382 __raw_writel(reg, MXC_CCM_CCSR);
383 return 0;
384 }
385
386 static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent)
387 {
388 u32 reg;
389
390 if (parent == &osc_clk)
391 reg = __raw_readl(MXC_CCM_CCSR) & ~MXC_CCM_CCSR_LP_APM_SEL;
392 else
393 return -EINVAL;
394
395 __raw_writel(reg, MXC_CCM_CCSR);
396
397 return 0;
398 }
399
400 static unsigned long clk_cpu_get_rate(struct clk *clk)
401 {
402 u32 cacrr, div;
403 unsigned long parent_rate;
404
405 parent_rate = clk_get_rate(clk->parent);
406 cacrr = __raw_readl(MXC_CCM_CACRR);
407 div = (cacrr & MXC_CCM_CACRR_ARM_PODF_MASK) + 1;
408
409 return parent_rate / div;
410 }
411
412 static int clk_cpu_set_rate(struct clk *clk, unsigned long rate)
413 {
414 u32 reg, cpu_podf;
415 unsigned long parent_rate;
416
417 parent_rate = clk_get_rate(clk->parent);
418 cpu_podf = parent_rate / rate - 1;
419 /* use post divider to change freq */
420 reg = __raw_readl(MXC_CCM_CACRR);
421 reg &= ~MXC_CCM_CACRR_ARM_PODF_MASK;
422 reg |= cpu_podf << MXC_CCM_CACRR_ARM_PODF_OFFSET;
423 __raw_writel(reg, MXC_CCM_CACRR);
424
425 return 0;
426 }
427
428 static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent)
429 {
430 u32 reg, mux;
431 int i = 0;
432
433 mux = _get_mux(parent, &pll1_sw_clk, &pll3_sw_clk, &lp_apm_clk, NULL);
434
435 reg = __raw_readl(MXC_CCM_CBCMR) & ~MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK;
436 reg |= mux << MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET;
437 __raw_writel(reg, MXC_CCM_CBCMR);
438
439 /* Wait for lock */
440 do {
441 reg = __raw_readl(MXC_CCM_CDHIPR);
442 if (!(reg & MXC_CCM_CDHIPR_PERIPH_CLK_SEL_BUSY))
443 break;
444
445 udelay(1);
446 } while (++i < MAX_DPLL_WAIT_TRIES);
447
448 if (i == MAX_DPLL_WAIT_TRIES) {
449 pr_err("MX5: Set parent for periph_apm clock failed\n");
450 return -EINVAL;
451 }
452
453 return 0;
454 }
455
456 static int _clk_main_bus_set_parent(struct clk *clk, struct clk *parent)
457 {
458 u32 reg;
459
460 reg = __raw_readl(MXC_CCM_CBCDR);
461
462 if (parent == &pll2_sw_clk)
463 reg &= ~MXC_CCM_CBCDR_PERIPH_CLK_SEL;
464 else if (parent == &periph_apm_clk)
465 reg |= MXC_CCM_CBCDR_PERIPH_CLK_SEL;
466 else
467 return -EINVAL;
468
469 __raw_writel(reg, MXC_CCM_CBCDR);
470
471 return 0;
472 }
473
474 static struct clk main_bus_clk = {
475 .parent = &pll2_sw_clk,
476 .set_parent = _clk_main_bus_set_parent,
477 };
478
479 static unsigned long clk_ahb_get_rate(struct clk *clk)
480 {
481 u32 reg, div;
482 unsigned long parent_rate;
483
484 parent_rate = clk_get_rate(clk->parent);
485
486 reg = __raw_readl(MXC_CCM_CBCDR);
487 div = ((reg & MXC_CCM_CBCDR_AHB_PODF_MASK) >>
488 MXC_CCM_CBCDR_AHB_PODF_OFFSET) + 1;
489 return parent_rate / div;
490 }
491
492
493 static int _clk_ahb_set_rate(struct clk *clk, unsigned long rate)
494 {
495 u32 reg, div;
496 unsigned long parent_rate;
497 int i = 0;
498
499 parent_rate = clk_get_rate(clk->parent);
500
501 div = parent_rate / rate;
502 if (div > 8 || div < 1 || ((parent_rate / div) != rate))
503 return -EINVAL;
504
505 reg = __raw_readl(MXC_CCM_CBCDR);
506 reg &= ~MXC_CCM_CBCDR_AHB_PODF_MASK;
507 reg |= (div - 1) << MXC_CCM_CBCDR_AHB_PODF_OFFSET;
508 __raw_writel(reg, MXC_CCM_CBCDR);
509
510 /* Wait for lock */
511 do {
512 reg = __raw_readl(MXC_CCM_CDHIPR);
513 if (!(reg & MXC_CCM_CDHIPR_AHB_PODF_BUSY))
514 break;
515
516 udelay(1);
517 } while (++i < MAX_DPLL_WAIT_TRIES);
518
519 if (i == MAX_DPLL_WAIT_TRIES) {
520 pr_err("MX5: clk_ahb_set_rate failed\n");
521 return -EINVAL;
522 }
523
524 return 0;
525 }
526
527 static unsigned long _clk_ahb_round_rate(struct clk *clk,
528 unsigned long rate)
529 {
530 u32 div;
531 unsigned long parent_rate;
532
533 parent_rate = clk_get_rate(clk->parent);
534
535 div = parent_rate / rate;
536 if (div > 8)
537 div = 8;
538 else if (div == 0)
539 div++;
540 return parent_rate / div;
541 }
542
543
544 static int _clk_max_enable(struct clk *clk)
545 {
546 u32 reg;
547
548 _clk_ccgr_enable(clk);
549
550 /* Handshake with MAX when LPM is entered. */
551 reg = __raw_readl(MXC_CCM_CLPCR);
552 if (cpu_is_mx51())
553 reg &= ~MX51_CCM_CLPCR_BYPASS_MAX_LPM_HS;
554 else if (cpu_is_mx53())
555 reg &= ~MX53_CCM_CLPCR_BYPASS_MAX_LPM_HS;
556 __raw_writel(reg, MXC_CCM_CLPCR);
557
558 return 0;
559 }
560
561 static void _clk_max_disable(struct clk *clk)
562 {
563 u32 reg;
564
565 _clk_ccgr_disable_inwait(clk);
566
567 /* No Handshake with MAX when LPM is entered as its disabled. */
568 reg = __raw_readl(MXC_CCM_CLPCR);
569 if (cpu_is_mx51())
570 reg |= MX51_CCM_CLPCR_BYPASS_MAX_LPM_HS;
571 else if (cpu_is_mx53())
572 reg &= ~MX53_CCM_CLPCR_BYPASS_MAX_LPM_HS;
573 __raw_writel(reg, MXC_CCM_CLPCR);
574 }
575
576 static unsigned long clk_ipg_get_rate(struct clk *clk)
577 {
578 u32 reg, div;
579 unsigned long parent_rate;
580
581 parent_rate = clk_get_rate(clk->parent);
582
583 reg = __raw_readl(MXC_CCM_CBCDR);
584 div = ((reg & MXC_CCM_CBCDR_IPG_PODF_MASK) >>
585 MXC_CCM_CBCDR_IPG_PODF_OFFSET) + 1;
586
587 return parent_rate / div;
588 }
589
590 static unsigned long clk_ipg_per_get_rate(struct clk *clk)
591 {
592 u32 reg, prediv1, prediv2, podf;
593 unsigned long parent_rate;
594
595 parent_rate = clk_get_rate(clk->parent);
596
597 if (clk->parent == &main_bus_clk || clk->parent == &lp_apm_clk) {
598 /* the main_bus_clk is the one before the DVFS engine */
599 reg = __raw_readl(MXC_CCM_CBCDR);
600 prediv1 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >>
601 MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET) + 1;
602 prediv2 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >>
603 MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET) + 1;
604 podf = ((reg & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >>
605 MXC_CCM_CBCDR_PERCLK_PODF_OFFSET) + 1;
606 return parent_rate / (prediv1 * prediv2 * podf);
607 } else if (clk->parent == &ipg_clk)
608 return parent_rate;
609 else
610 BUG();
611 }
612
613 static int _clk_ipg_per_set_parent(struct clk *clk, struct clk *parent)
614 {
615 u32 reg;
616
617 reg = __raw_readl(MXC_CCM_CBCMR);
618
619 reg &= ~MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
620 reg &= ~MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
621
622 if (parent == &ipg_clk)
623 reg |= MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
624 else if (parent == &lp_apm_clk)
625 reg |= MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
626 else if (parent != &main_bus_clk)
627 return -EINVAL;
628
629 __raw_writel(reg, MXC_CCM_CBCMR);
630
631 return 0;
632 }
633
634 #define clk_nfc_set_parent NULL
635
636 static unsigned long clk_nfc_get_rate(struct clk *clk)
637 {
638 unsigned long rate;
639 u32 reg, div;
640
641 reg = __raw_readl(MXC_CCM_CBCDR);
642 div = ((reg & MXC_CCM_CBCDR_NFC_PODF_MASK) >>
643 MXC_CCM_CBCDR_NFC_PODF_OFFSET) + 1;
644 rate = clk_get_rate(clk->parent) / div;
645 WARN_ON(rate == 0);
646 return rate;
647 }
648
649 static unsigned long clk_nfc_round_rate(struct clk *clk,
650 unsigned long rate)
651 {
652 u32 div;
653 unsigned long parent_rate = clk_get_rate(clk->parent);
654
655 if (!rate)
656 return -EINVAL;
657
658 div = parent_rate / rate;
659
660 if (parent_rate % rate)
661 div++;
662
663 if (div > 8)
664 return -EINVAL;
665
666 return parent_rate / div;
667
668 }
669
670 static int clk_nfc_set_rate(struct clk *clk, unsigned long rate)
671 {
672 u32 reg, div;
673
674 div = clk_get_rate(clk->parent) / rate;
675 if (div == 0)
676 div++;
677 if (((clk_get_rate(clk->parent) / div) != rate) || (div > 8))
678 return -EINVAL;
679
680 reg = __raw_readl(MXC_CCM_CBCDR);
681 reg &= ~MXC_CCM_CBCDR_NFC_PODF_MASK;
682 reg |= (div - 1) << MXC_CCM_CBCDR_NFC_PODF_OFFSET;
683 __raw_writel(reg, MXC_CCM_CBCDR);
684
685 while (__raw_readl(MXC_CCM_CDHIPR) &
686 MXC_CCM_CDHIPR_NFC_IPG_INT_MEM_PODF_BUSY){
687 }
688
689 return 0;
690 }
691
692 static unsigned long get_high_reference_clock_rate(struct clk *clk)
693 {
694 return external_high_reference;
695 }
696
697 static unsigned long get_low_reference_clock_rate(struct clk *clk)
698 {
699 return external_low_reference;
700 }
701
702 static unsigned long get_oscillator_reference_clock_rate(struct clk *clk)
703 {
704 return oscillator_reference;
705 }
706
707 static unsigned long get_ckih2_reference_clock_rate(struct clk *clk)
708 {
709 return ckih2_reference;
710 }
711
712 static unsigned long clk_emi_slow_get_rate(struct clk *clk)
713 {
714 u32 reg, div;
715
716 reg = __raw_readl(MXC_CCM_CBCDR);
717 div = ((reg & MXC_CCM_CBCDR_EMI_PODF_MASK) >>
718 MXC_CCM_CBCDR_EMI_PODF_OFFSET) + 1;
719
720 return clk_get_rate(clk->parent) / div;
721 }
722
723 static unsigned long _clk_ddr_hf_get_rate(struct clk *clk)
724 {
725 unsigned long rate;
726 u32 reg, div;
727
728 reg = __raw_readl(MXC_CCM_CBCDR);
729 div = ((reg & MXC_CCM_CBCDR_DDR_PODF_MASK) >>
730 MXC_CCM_CBCDR_DDR_PODF_OFFSET) + 1;
731 rate = clk_get_rate(clk->parent) / div;
732
733 return rate;
734 }
735
736 /* External high frequency clock */
737 static struct clk ckih_clk = {
738 .get_rate = get_high_reference_clock_rate,
739 };
740
741 static struct clk ckih2_clk = {
742 .get_rate = get_ckih2_reference_clock_rate,
743 };
744
745 static struct clk osc_clk = {
746 .get_rate = get_oscillator_reference_clock_rate,
747 };
748
749 /* External low frequency (32kHz) clock */
750 static struct clk ckil_clk = {
751 .get_rate = get_low_reference_clock_rate,
752 };
753
754 static struct clk pll1_main_clk = {
755 .parent = &osc_clk,
756 .get_rate = clk_pll_get_rate,
757 .enable = _clk_pll_enable,
758 .disable = _clk_pll_disable,
759 };
760
761 /* Clock tree block diagram (WIP):
762 * CCM: Clock Controller Module
763 *
764 * PLL output -> |
765 * | CCM Switcher -> CCM_CLK_ROOT_GEN ->
766 * PLL bypass -> |
767 *
768 */
769
770 /* PLL1 SW supplies to ARM core */
771 static struct clk pll1_sw_clk = {
772 .parent = &pll1_main_clk,
773 .set_parent = _clk_pll1_sw_set_parent,
774 .get_rate = clk_pll1_sw_get_rate,
775 };
776
777 /* PLL2 SW supplies to AXI/AHB/IP buses */
778 static struct clk pll2_sw_clk = {
779 .parent = &osc_clk,
780 .get_rate = clk_pll_get_rate,
781 .set_rate = _clk_pll_set_rate,
782 .set_parent = _clk_pll2_sw_set_parent,
783 .enable = _clk_pll_enable,
784 .disable = _clk_pll_disable,
785 };
786
787 /* PLL3 SW supplies to serial clocks like USB, SSI, etc. */
788 static struct clk pll3_sw_clk = {
789 .parent = &osc_clk,
790 .set_rate = _clk_pll_set_rate,
791 .get_rate = clk_pll_get_rate,
792 .enable = _clk_pll_enable,
793 .disable = _clk_pll_disable,
794 };
795
796 /* PLL4 SW supplies to LVDS Display Bridge(LDB) */
797 static struct clk mx53_pll4_sw_clk = {
798 .parent = &osc_clk,
799 .set_rate = _clk_pll_set_rate,
800 .enable = _clk_pll_enable,
801 .disable = _clk_pll_disable,
802 };
803
804 /* Low-power Audio Playback Mode clock */
805 static struct clk lp_apm_clk = {
806 .parent = &osc_clk,
807 .set_parent = _clk_lp_apm_set_parent,
808 };
809
810 static struct clk periph_apm_clk = {
811 .parent = &pll1_sw_clk,
812 .set_parent = _clk_periph_apm_set_parent,
813 };
814
815 static struct clk cpu_clk = {
816 .parent = &pll1_sw_clk,
817 .get_rate = clk_cpu_get_rate,
818 .set_rate = clk_cpu_set_rate,
819 };
820
821 static struct clk ahb_clk = {
822 .parent = &main_bus_clk,
823 .get_rate = clk_ahb_get_rate,
824 .set_rate = _clk_ahb_set_rate,
825 .round_rate = _clk_ahb_round_rate,
826 };
827
828 static struct clk iim_clk = {
829 .parent = &ipg_clk,
830 .enable_reg = MXC_CCM_CCGR0,
831 .enable_shift = MXC_CCM_CCGRx_CG15_OFFSET,
832 };
833
834 /* Main IP interface clock for access to registers */
835 static struct clk ipg_clk = {
836 .parent = &ahb_clk,
837 .get_rate = clk_ipg_get_rate,
838 };
839
840 static struct clk ipg_perclk = {
841 .parent = &lp_apm_clk,
842 .get_rate = clk_ipg_per_get_rate,
843 .set_parent = _clk_ipg_per_set_parent,
844 };
845
846 static struct clk ahb_max_clk = {
847 .parent = &ahb_clk,
848 .enable_reg = MXC_CCM_CCGR0,
849 .enable_shift = MXC_CCM_CCGRx_CG14_OFFSET,
850 .enable = _clk_max_enable,
851 .disable = _clk_max_disable,
852 };
853
854 static struct clk aips_tz1_clk = {
855 .parent = &ahb_clk,
856 .secondary = &ahb_max_clk,
857 .enable_reg = MXC_CCM_CCGR0,
858 .enable_shift = MXC_CCM_CCGRx_CG12_OFFSET,
859 .enable = _clk_ccgr_enable,
860 .disable = _clk_ccgr_disable_inwait,
861 };
862
863 static struct clk aips_tz2_clk = {
864 .parent = &ahb_clk,
865 .secondary = &ahb_max_clk,
866 .enable_reg = MXC_CCM_CCGR0,
867 .enable_shift = MXC_CCM_CCGRx_CG13_OFFSET,
868 .enable = _clk_ccgr_enable,
869 .disable = _clk_ccgr_disable_inwait,
870 };
871
872 static struct clk gpc_dvfs_clk = {
873 .enable_reg = MXC_CCM_CCGR5,
874 .enable_shift = MXC_CCM_CCGRx_CG12_OFFSET,
875 .enable = _clk_ccgr_enable,
876 .disable = _clk_ccgr_disable,
877 };
878
879 static struct clk gpt_32k_clk = {
880 .id = 0,
881 .parent = &ckil_clk,
882 };
883
884 static struct clk dummy_clk = {
885 .id = 0,
886 };
887
888 static struct clk emi_slow_clk = {
889 .parent = &pll2_sw_clk,
890 .enable_reg = MXC_CCM_CCGR5,
891 .enable_shift = MXC_CCM_CCGRx_CG8_OFFSET,
892 .enable = _clk_ccgr_enable,
893 .disable = _clk_ccgr_disable_inwait,
894 .get_rate = clk_emi_slow_get_rate,
895 };
896
897 static int clk_ipu_enable(struct clk *clk)
898 {
899 u32 reg;
900
901 _clk_ccgr_enable(clk);
902
903 /* Enable handshake with IPU when certain clock rates are changed */
904 reg = __raw_readl(MXC_CCM_CCDR);
905 reg &= ~MXC_CCM_CCDR_IPU_HS_MASK;
906 __raw_writel(reg, MXC_CCM_CCDR);
907
908 /* Enable handshake with IPU when LPM is entered */
909 reg = __raw_readl(MXC_CCM_CLPCR);
910 reg &= ~MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
911 __raw_writel(reg, MXC_CCM_CLPCR);
912
913 return 0;
914 }
915
916 static void clk_ipu_disable(struct clk *clk)
917 {
918 u32 reg;
919
920 _clk_ccgr_disable(clk);
921
922 /* Disable handshake with IPU whe dividers are changed */
923 reg = __raw_readl(MXC_CCM_CCDR);
924 reg |= MXC_CCM_CCDR_IPU_HS_MASK;
925 __raw_writel(reg, MXC_CCM_CCDR);
926
927 /* Disable handshake with IPU when LPM is entered */
928 reg = __raw_readl(MXC_CCM_CLPCR);
929 reg |= MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
930 __raw_writel(reg, MXC_CCM_CLPCR);
931 }
932
933 static struct clk ahbmux1_clk = {
934 .parent = &ahb_clk,
935 .secondary = &ahb_max_clk,
936 .enable_reg = MXC_CCM_CCGR0,
937 .enable_shift = MXC_CCM_CCGRx_CG8_OFFSET,
938 .enable = _clk_ccgr_enable,
939 .disable = _clk_ccgr_disable_inwait,
940 };
941
942 static struct clk ipu_sec_clk = {
943 .parent = &emi_fast_clk,
944 .secondary = &ahbmux1_clk,
945 };
946
947 static struct clk ddr_hf_clk = {
948 .parent = &pll1_sw_clk,
949 .get_rate = _clk_ddr_hf_get_rate,
950 };
951
952 static struct clk ddr_clk = {
953 .parent = &ddr_hf_clk,
954 };
955
956 /* clock definitions for MIPI HSC unit which has been removed
957 * from documentation, but not from hardware
958 */
959 static int _clk_hsc_enable(struct clk *clk)
960 {
961 u32 reg;
962
963 _clk_ccgr_enable(clk);
964 /* Handshake with IPU when certain clock rates are changed. */
965 reg = __raw_readl(MXC_CCM_CCDR);
966 reg &= ~MXC_CCM_CCDR_HSC_HS_MASK;
967 __raw_writel(reg, MXC_CCM_CCDR);
968
969 reg = __raw_readl(MXC_CCM_CLPCR);
970 reg &= ~MXC_CCM_CLPCR_BYPASS_HSC_LPM_HS;
971 __raw_writel(reg, MXC_CCM_CLPCR);
972
973 return 0;
974 }
975
976 static void _clk_hsc_disable(struct clk *clk)
977 {
978 u32 reg;
979
980 _clk_ccgr_disable(clk);
981 /* No handshake with HSC as its not enabled. */
982 reg = __raw_readl(MXC_CCM_CCDR);
983 reg |= MXC_CCM_CCDR_HSC_HS_MASK;
984 __raw_writel(reg, MXC_CCM_CCDR);
985
986 reg = __raw_readl(MXC_CCM_CLPCR);
987 reg |= MXC_CCM_CLPCR_BYPASS_HSC_LPM_HS;
988 __raw_writel(reg, MXC_CCM_CLPCR);
989 }
990
991 static struct clk mipi_hsp_clk = {
992 .parent = &ipu_clk,
993 .enable_reg = MXC_CCM_CCGR4,
994 .enable_shift = MXC_CCM_CCGRx_CG6_OFFSET,
995 .enable = _clk_hsc_enable,
996 .disable = _clk_hsc_disable,
997 .secondary = &mipi_hsc1_clk,
998 };
999
1000 #define DEFINE_CLOCK_CCGR(name, i, er, es, pfx, p, s) \
1001 static struct clk name = { \
1002 .id = i, \
1003 .enable_reg = er, \
1004 .enable_shift = es, \
1005 .get_rate = pfx##_get_rate, \
1006 .set_rate = pfx##_set_rate, \
1007 .round_rate = pfx##_round_rate, \
1008 .set_parent = pfx##_set_parent, \
1009 .enable = _clk_ccgr_enable, \
1010 .disable = _clk_ccgr_disable, \
1011 .parent = p, \
1012 .secondary = s, \
1013 }
1014
1015 #define DEFINE_CLOCK_MAX(name, i, er, es, pfx, p, s) \
1016 static struct clk name = { \
1017 .id = i, \
1018 .enable_reg = er, \
1019 .enable_shift = es, \
1020 .get_rate = pfx##_get_rate, \
1021 .set_rate = pfx##_set_rate, \
1022 .set_parent = pfx##_set_parent, \
1023 .enable = _clk_max_enable, \
1024 .disable = _clk_max_disable, \
1025 .parent = p, \
1026 .secondary = s, \
1027 }
1028
1029 #define CLK_GET_RATE(name, nr, bitsname) \
1030 static unsigned long clk_##name##_get_rate(struct clk *clk) \
1031 { \
1032 u32 reg, pred, podf; \
1033 \
1034 reg = __raw_readl(MXC_CCM_CSCDR##nr); \
1035 pred = (reg & MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK) \
1036 >> MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET; \
1037 podf = (reg & MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK) \
1038 >> MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET; \
1039 \
1040 return DIV_ROUND_CLOSEST(clk_get_rate(clk->parent), \
1041 (pred + 1) * (podf + 1)); \
1042 }
1043
1044 #define CLK_SET_PARENT(name, nr, bitsname) \
1045 static int clk_##name##_set_parent(struct clk *clk, struct clk *parent) \
1046 { \
1047 u32 reg, mux; \
1048 \
1049 mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, \
1050 &pll3_sw_clk, &lp_apm_clk); \
1051 reg = __raw_readl(MXC_CCM_CSCMR##nr) & \
1052 ~MXC_CCM_CSCMR##nr##_##bitsname##_CLK_SEL_MASK; \
1053 reg |= mux << MXC_CCM_CSCMR##nr##_##bitsname##_CLK_SEL_OFFSET; \
1054 __raw_writel(reg, MXC_CCM_CSCMR##nr); \
1055 \
1056 return 0; \
1057 }
1058
1059 #define CLK_SET_RATE(name, nr, bitsname) \
1060 static int clk_##name##_set_rate(struct clk *clk, unsigned long rate) \
1061 { \
1062 u32 reg, div, parent_rate; \
1063 u32 pre = 0, post = 0; \
1064 \
1065 parent_rate = clk_get_rate(clk->parent); \
1066 div = parent_rate / rate; \
1067 \
1068 if ((parent_rate / div) != rate) \
1069 return -EINVAL; \
1070 \
1071 __calc_pre_post_dividers(div, &pre, &post, \
1072 (MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK >> \
1073 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET) + 1, \
1074 (MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK >> \
1075 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET) + 1);\
1076 \
1077 /* Set sdhc1 clock divider */ \
1078 reg = __raw_readl(MXC_CCM_CSCDR##nr) & \
1079 ~(MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK \
1080 | MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK); \
1081 reg |= (post - 1) << \
1082 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET; \
1083 reg |= (pre - 1) << \
1084 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET; \
1085 __raw_writel(reg, MXC_CCM_CSCDR##nr); \
1086 \
1087 return 0; \
1088 }
1089
1090 /* UART */
1091 CLK_GET_RATE(uart, 1, UART)
1092 CLK_SET_PARENT(uart, 1, UART)
1093
1094 static struct clk uart_root_clk = {
1095 .parent = &pll2_sw_clk,
1096 .get_rate = clk_uart_get_rate,
1097 .set_parent = clk_uart_set_parent,
1098 };
1099
1100 /* USBOH3 */
1101 CLK_GET_RATE(usboh3, 1, USBOH3)
1102 CLK_SET_PARENT(usboh3, 1, USBOH3)
1103
1104 static struct clk usboh3_clk = {
1105 .parent = &pll2_sw_clk,
1106 .get_rate = clk_usboh3_get_rate,
1107 .set_parent = clk_usboh3_set_parent,
1108 .enable = _clk_ccgr_enable,
1109 .disable = _clk_ccgr_disable,
1110 .enable_reg = MXC_CCM_CCGR2,
1111 .enable_shift = MXC_CCM_CCGRx_CG14_OFFSET,
1112 };
1113
1114 static struct clk usb_ahb_clk = {
1115 .parent = &ipg_clk,
1116 .enable = _clk_ccgr_enable,
1117 .disable = _clk_ccgr_disable,
1118 .enable_reg = MXC_CCM_CCGR2,
1119 .enable_shift = MXC_CCM_CCGRx_CG13_OFFSET,
1120 };
1121
1122 static int clk_usb_phy1_set_parent(struct clk *clk, struct clk *parent)
1123 {
1124 u32 reg;
1125
1126 reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL;
1127
1128 if (parent == &pll3_sw_clk)
1129 reg |= 1 << MXC_CCM_CSCMR1_USB_PHY_CLK_SEL_OFFSET;
1130
1131 __raw_writel(reg, MXC_CCM_CSCMR1);
1132
1133 return 0;
1134 }
1135
1136 static struct clk usb_phy1_clk = {
1137 .parent = &pll3_sw_clk,
1138 .set_parent = clk_usb_phy1_set_parent,
1139 .enable = _clk_ccgr_enable,
1140 .enable_reg = MXC_CCM_CCGR2,
1141 .enable_shift = MXC_CCM_CCGRx_CG0_OFFSET,
1142 .disable = _clk_ccgr_disable,
1143 };
1144
1145 /* eCSPI */
1146 CLK_GET_RATE(ecspi, 2, CSPI)
1147 CLK_SET_PARENT(ecspi, 1, CSPI)
1148
1149 static struct clk ecspi_main_clk = {
1150 .parent = &pll3_sw_clk,
1151 .get_rate = clk_ecspi_get_rate,
1152 .set_parent = clk_ecspi_set_parent,
1153 };
1154
1155 /* eSDHC */
1156 CLK_GET_RATE(esdhc1, 1, ESDHC1_MSHC1)
1157 CLK_SET_PARENT(esdhc1, 1, ESDHC1_MSHC1)
1158 CLK_SET_RATE(esdhc1, 1, ESDHC1_MSHC1)
1159
1160 /* mx51 specific */
1161 CLK_GET_RATE(esdhc2, 1, ESDHC2_MSHC2)
1162 CLK_SET_PARENT(esdhc2, 1, ESDHC2_MSHC2)
1163 CLK_SET_RATE(esdhc2, 1, ESDHC2_MSHC2)
1164
1165 static int clk_esdhc3_set_parent(struct clk *clk, struct clk *parent)
1166 {
1167 u32 reg;
1168
1169 reg = __raw_readl(MXC_CCM_CSCMR1);
1170 if (parent == &esdhc1_clk)
1171 reg &= ~MXC_CCM_CSCMR1_ESDHC3_CLK_SEL;
1172 else if (parent == &esdhc2_clk)
1173 reg |= MXC_CCM_CSCMR1_ESDHC3_CLK_SEL;
1174 else
1175 return -EINVAL;
1176 __raw_writel(reg, MXC_CCM_CSCMR1);
1177
1178 return 0;
1179 }
1180
1181 static int clk_esdhc4_set_parent(struct clk *clk, struct clk *parent)
1182 {
1183 u32 reg;
1184
1185 reg = __raw_readl(MXC_CCM_CSCMR1);
1186 if (parent == &esdhc1_clk)
1187 reg &= ~MXC_CCM_CSCMR1_ESDHC4_CLK_SEL;
1188 else if (parent == &esdhc2_clk)
1189 reg |= MXC_CCM_CSCMR1_ESDHC4_CLK_SEL;
1190 else
1191 return -EINVAL;
1192 __raw_writel(reg, MXC_CCM_CSCMR1);
1193
1194 return 0;
1195 }
1196
1197 /* mx53 specific */
1198 static int clk_esdhc2_mx53_set_parent(struct clk *clk, struct clk *parent)
1199 {
1200 u32 reg;
1201
1202 reg = __raw_readl(MXC_CCM_CSCMR1);
1203 if (parent == &esdhc1_clk)
1204 reg &= ~MXC_CCM_CSCMR1_ESDHC2_MSHC2_MX53_CLK_SEL;
1205 else if (parent == &esdhc3_mx53_clk)
1206 reg |= MXC_CCM_CSCMR1_ESDHC2_MSHC2_MX53_CLK_SEL;
1207 else
1208 return -EINVAL;
1209 __raw_writel(reg, MXC_CCM_CSCMR1);
1210
1211 return 0;
1212 }
1213
1214 CLK_GET_RATE(esdhc3_mx53, 1, ESDHC3_MX53)
1215 CLK_SET_PARENT(esdhc3_mx53, 1, ESDHC3_MX53)
1216 CLK_SET_RATE(esdhc3_mx53, 1, ESDHC3_MX53)
1217
1218 static int clk_esdhc4_mx53_set_parent(struct clk *clk, struct clk *parent)
1219 {
1220 u32 reg;
1221
1222 reg = __raw_readl(MXC_CCM_CSCMR1);
1223 if (parent == &esdhc1_clk)
1224 reg &= ~MXC_CCM_CSCMR1_ESDHC4_CLK_SEL;
1225 else if (parent == &esdhc3_mx53_clk)
1226 reg |= MXC_CCM_CSCMR1_ESDHC4_CLK_SEL;
1227 else
1228 return -EINVAL;
1229 __raw_writel(reg, MXC_CCM_CSCMR1);
1230
1231 return 0;
1232 }
1233
1234 #define DEFINE_CLOCK_FULL(name, i, er, es, gr, sr, e, d, p, s) \
1235 static struct clk name = { \
1236 .id = i, \
1237 .enable_reg = er, \
1238 .enable_shift = es, \
1239 .get_rate = gr, \
1240 .set_rate = sr, \
1241 .enable = e, \
1242 .disable = d, \
1243 .parent = p, \
1244 .secondary = s, \
1245 }
1246
1247 #define DEFINE_CLOCK(name, i, er, es, gr, sr, p, s) \
1248 DEFINE_CLOCK_FULL(name, i, er, es, gr, sr, _clk_ccgr_enable, _clk_ccgr_disable, p, s)
1249
1250 /* Shared peripheral bus arbiter */
1251 DEFINE_CLOCK(spba_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG0_OFFSET,
1252 NULL, NULL, &ipg_clk, NULL);
1253
1254 /* UART */
1255 DEFINE_CLOCK(uart1_ipg_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG3_OFFSET,
1256 NULL, NULL, &ipg_clk, &aips_tz1_clk);
1257 DEFINE_CLOCK(uart2_ipg_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG5_OFFSET,
1258 NULL, NULL, &ipg_clk, &aips_tz1_clk);
1259 DEFINE_CLOCK(uart3_ipg_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG7_OFFSET,
1260 NULL, NULL, &ipg_clk, &spba_clk);
1261 DEFINE_CLOCK(uart4_ipg_clk, 3, MXC_CCM_CCGR7, MXC_CCM_CCGRx_CG4_OFFSET,
1262 NULL, NULL, &ipg_clk, &spba_clk);
1263 DEFINE_CLOCK(uart5_ipg_clk, 4, MXC_CCM_CCGR7, MXC_CCM_CCGRx_CG6_OFFSET,
1264 NULL, NULL, &ipg_clk, &spba_clk);
1265 DEFINE_CLOCK(uart1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG4_OFFSET,
1266 NULL, NULL, &uart_root_clk, &uart1_ipg_clk);
1267 DEFINE_CLOCK(uart2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG6_OFFSET,
1268 NULL, NULL, &uart_root_clk, &uart2_ipg_clk);
1269 DEFINE_CLOCK(uart3_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG8_OFFSET,
1270 NULL, NULL, &uart_root_clk, &uart3_ipg_clk);
1271 DEFINE_CLOCK(uart4_clk, 3, MXC_CCM_CCGR7, MXC_CCM_CCGRx_CG5_OFFSET,
1272 NULL, NULL, &uart_root_clk, &uart4_ipg_clk);
1273 DEFINE_CLOCK(uart5_clk, 4, MXC_CCM_CCGR7, MXC_CCM_CCGRx_CG7_OFFSET,
1274 NULL, NULL, &uart_root_clk, &uart5_ipg_clk);
1275
1276 /* GPT */
1277 DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG10_OFFSET,
1278 NULL, NULL, &ipg_clk, NULL);
1279 DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG9_OFFSET,
1280 NULL, NULL, &ipg_clk, &gpt_ipg_clk);
1281
1282 DEFINE_CLOCK(pwm1_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG6_OFFSET,
1283 NULL, NULL, &ipg_clk, NULL);
1284 DEFINE_CLOCK(pwm2_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG8_OFFSET,
1285 NULL, NULL, &ipg_clk, NULL);
1286
1287 /* I2C */
1288 DEFINE_CLOCK(i2c1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG9_OFFSET,
1289 NULL, NULL, &ipg_perclk, NULL);
1290 DEFINE_CLOCK(i2c2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG10_OFFSET,
1291 NULL, NULL, &ipg_perclk, NULL);
1292 DEFINE_CLOCK(hsi2c_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG11_OFFSET,
1293 NULL, NULL, &ipg_clk, NULL);
1294 DEFINE_CLOCK(i2c3_mx53_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG11_OFFSET,
1295 NULL, NULL, &ipg_perclk, NULL);
1296
1297 /* FEC */
1298 DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
1299 NULL, NULL, &ipg_clk, NULL);
1300
1301 /* NFC */
1302 DEFINE_CLOCK_CCGR(nfc_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG10_OFFSET,
1303 clk_nfc, &emi_slow_clk, NULL);
1304
1305 /* SSI */
1306 DEFINE_CLOCK(ssi1_ipg_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG8_OFFSET,
1307 NULL, NULL, &ipg_clk, NULL);
1308 DEFINE_CLOCK(ssi1_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG9_OFFSET,
1309 NULL, NULL, &pll3_sw_clk, &ssi1_ipg_clk);
1310 DEFINE_CLOCK(ssi2_ipg_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG10_OFFSET,
1311 NULL, NULL, &ipg_clk, NULL);
1312 DEFINE_CLOCK(ssi2_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG11_OFFSET,
1313 NULL, NULL, &pll3_sw_clk, &ssi2_ipg_clk);
1314 DEFINE_CLOCK(ssi3_ipg_clk, 2, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG12_OFFSET,
1315 NULL, NULL, &ipg_clk, NULL);
1316 DEFINE_CLOCK(ssi3_clk, 2, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG13_OFFSET,
1317 NULL, NULL, &pll3_sw_clk, &ssi3_ipg_clk);
1318
1319 /* eCSPI */
1320 DEFINE_CLOCK_FULL(ecspi1_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG9_OFFSET,
1321 NULL, NULL, _clk_ccgr_enable_inrun, _clk_ccgr_disable,
1322 &ipg_clk, &spba_clk);
1323 DEFINE_CLOCK(ecspi1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG10_OFFSET,
1324 NULL, NULL, &ecspi_main_clk, &ecspi1_ipg_clk);
1325 DEFINE_CLOCK_FULL(ecspi2_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG11_OFFSET,
1326 NULL, NULL, _clk_ccgr_enable_inrun, _clk_ccgr_disable,
1327 &ipg_clk, &aips_tz2_clk);
1328 DEFINE_CLOCK(ecspi2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG12_OFFSET,
1329 NULL, NULL, &ecspi_main_clk, &ecspi2_ipg_clk);
1330
1331 /* CSPI */
1332 DEFINE_CLOCK(cspi_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG9_OFFSET,
1333 NULL, NULL, &ipg_clk, &aips_tz2_clk);
1334 DEFINE_CLOCK(cspi_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG13_OFFSET,
1335 NULL, NULL, &ipg_clk, &cspi_ipg_clk);
1336
1337 /* SDMA */
1338 DEFINE_CLOCK(sdma_clk, 1, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG15_OFFSET,
1339 NULL, NULL, &ahb_clk, NULL);
1340
1341 /* eSDHC */
1342 DEFINE_CLOCK_FULL(esdhc1_ipg_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG0_OFFSET,
1343 NULL, NULL, _clk_max_enable, _clk_max_disable, &ipg_clk, NULL);
1344 DEFINE_CLOCK_MAX(esdhc1_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG1_OFFSET,
1345 clk_esdhc1, &pll2_sw_clk, &esdhc1_ipg_clk);
1346 DEFINE_CLOCK_FULL(esdhc2_ipg_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG2_OFFSET,
1347 NULL, NULL, _clk_max_enable, _clk_max_disable, &ipg_clk, NULL);
1348 DEFINE_CLOCK_FULL(esdhc3_ipg_clk, 2, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG4_OFFSET,
1349 NULL, NULL, _clk_max_enable, _clk_max_disable, &ipg_clk, NULL);
1350 DEFINE_CLOCK_FULL(esdhc4_ipg_clk, 3, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG6_OFFSET,
1351 NULL, NULL, _clk_max_enable, _clk_max_disable, &ipg_clk, NULL);
1352
1353 /* mx51 specific */
1354 DEFINE_CLOCK_MAX(esdhc2_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG3_OFFSET,
1355 clk_esdhc2, &pll2_sw_clk, &esdhc2_ipg_clk);
1356
1357 static struct clk esdhc3_clk = {
1358 .id = 2,
1359 .parent = &esdhc1_clk,
1360 .set_parent = clk_esdhc3_set_parent,
1361 .enable_reg = MXC_CCM_CCGR3,
1362 .enable_shift = MXC_CCM_CCGRx_CG5_OFFSET,
1363 .enable = _clk_max_enable,
1364 .disable = _clk_max_disable,
1365 .secondary = &esdhc3_ipg_clk,
1366 };
1367 static struct clk esdhc4_clk = {
1368 .id = 3,
1369 .parent = &esdhc1_clk,
1370 .set_parent = clk_esdhc4_set_parent,
1371 .enable_reg = MXC_CCM_CCGR3,
1372 .enable_shift = MXC_CCM_CCGRx_CG7_OFFSET,
1373 .enable = _clk_max_enable,
1374 .disable = _clk_max_disable,
1375 .secondary = &esdhc4_ipg_clk,
1376 };
1377
1378 /* mx53 specific */
1379 static struct clk esdhc2_mx53_clk = {
1380 .id = 2,
1381 .parent = &esdhc1_clk,
1382 .set_parent = clk_esdhc2_mx53_set_parent,
1383 .enable_reg = MXC_CCM_CCGR3,
1384 .enable_shift = MXC_CCM_CCGRx_CG3_OFFSET,
1385 .enable = _clk_max_enable,
1386 .disable = _clk_max_disable,
1387 .secondary = &esdhc3_ipg_clk,
1388 };
1389
1390 DEFINE_CLOCK_MAX(esdhc3_mx53_clk, 2, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG5_OFFSET,
1391 clk_esdhc3_mx53, &pll2_sw_clk, &esdhc2_ipg_clk);
1392
1393 static struct clk esdhc4_mx53_clk = {
1394 .id = 3,
1395 .parent = &esdhc1_clk,
1396 .set_parent = clk_esdhc4_mx53_set_parent,
1397 .enable_reg = MXC_CCM_CCGR3,
1398 .enable_shift = MXC_CCM_CCGRx_CG7_OFFSET,
1399 .enable = _clk_max_enable,
1400 .disable = _clk_max_disable,
1401 .secondary = &esdhc4_ipg_clk,
1402 };
1403
1404 DEFINE_CLOCK(mipi_esc_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG5_OFFSET, NULL, NULL, NULL, &pll2_sw_clk);
1405 DEFINE_CLOCK(mipi_hsc2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG4_OFFSET, NULL, NULL, &mipi_esc_clk, &pll2_sw_clk);
1406 DEFINE_CLOCK(mipi_hsc1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG3_OFFSET, NULL, NULL, &mipi_hsc2_clk, &pll2_sw_clk);
1407
1408 /* IPU */
1409 DEFINE_CLOCK_FULL(ipu_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG5_OFFSET,
1410 NULL, NULL, clk_ipu_enable, clk_ipu_disable, &ahb_clk, &ipu_sec_clk);
1411
1412 DEFINE_CLOCK_FULL(emi_fast_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG7_OFFSET,
1413 NULL, NULL, _clk_ccgr_enable, _clk_ccgr_disable_inwait,
1414 &ddr_clk, NULL);
1415
1416 DEFINE_CLOCK(ipu_di0_clk, 0, MXC_CCM_CCGR6, MXC_CCM_CCGRx_CG5_OFFSET,
1417 NULL, NULL, &pll3_sw_clk, NULL);
1418 DEFINE_CLOCK(ipu_di1_clk, 0, MXC_CCM_CCGR6, MXC_CCM_CCGRx_CG6_OFFSET,
1419 NULL, NULL, &pll3_sw_clk, NULL);
1420
1421 /* PATA */
1422 DEFINE_CLOCK(pata_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG0_OFFSET,
1423 NULL, NULL, &ipg_clk, &spba_clk);
1424
1425 #define _REGISTER_CLOCK(d, n, c) \
1426 { \
1427 .dev_id = d, \
1428 .con_id = n, \
1429 .clk = &c, \
1430 },
1431
1432 static struct clk_lookup mx51_lookups[] = {
1433 /* i.mx51 has the i.mx21 type uart */
1434 _REGISTER_CLOCK("imx21-uart.0", NULL, uart1_clk)
1435 _REGISTER_CLOCK("imx21-uart.1", NULL, uart2_clk)
1436 _REGISTER_CLOCK("imx21-uart.2", NULL, uart3_clk)
1437 _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
1438 /* i.mx51 has the i.mx27 type fec */
1439 _REGISTER_CLOCK("imx27-fec.0", NULL, fec_clk)
1440 _REGISTER_CLOCK("mxc_pwm.0", "pwm", pwm1_clk)
1441 _REGISTER_CLOCK("mxc_pwm.1", "pwm", pwm2_clk)
1442 _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
1443 _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
1444 _REGISTER_CLOCK("imx-i2c.2", NULL, hsi2c_clk)
1445 _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk)
1446 _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", usb_ahb_clk)
1447 _REGISTER_CLOCK("mxc-ehci.0", "usb_phy1", usb_phy1_clk)
1448 _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)
1449 _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", usb_ahb_clk)
1450 _REGISTER_CLOCK("mxc-ehci.2", "usb", usboh3_clk)
1451 _REGISTER_CLOCK("mxc-ehci.2", "usb_ahb", usb_ahb_clk)
1452 _REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk)
1453 _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk)
1454 _REGISTER_CLOCK("imx-keypad", NULL, dummy_clk)
1455 _REGISTER_CLOCK("mxc_nand", NULL, nfc_clk)
1456 _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
1457 _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
1458 _REGISTER_CLOCK("imx-ssi.2", NULL, ssi3_clk)
1459 /* i.mx51 has the i.mx35 type sdma */
1460 _REGISTER_CLOCK("imx35-sdma", NULL, sdma_clk)
1461 _REGISTER_CLOCK(NULL, "ckih", ckih_clk)
1462 _REGISTER_CLOCK(NULL, "ckih2", ckih2_clk)
1463 _REGISTER_CLOCK(NULL, "gpt_32k", gpt_32k_clk)
1464 _REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk)
1465 _REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk)
1466 /* i.mx51 has the i.mx35 type cspi */
1467 _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi_clk)
1468 _REGISTER_CLOCK("sdhci-esdhc-imx51.0", NULL, esdhc1_clk)
1469 _REGISTER_CLOCK("sdhci-esdhc-imx51.1", NULL, esdhc2_clk)
1470 _REGISTER_CLOCK("sdhci-esdhc-imx51.2", NULL, esdhc3_clk)
1471 _REGISTER_CLOCK("sdhci-esdhc-imx51.3", NULL, esdhc4_clk)
1472 _REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk)
1473 _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
1474 _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)
1475 _REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk)
1476 _REGISTER_CLOCK(NULL, "mipi_hsp", mipi_hsp_clk)
1477 _REGISTER_CLOCK("imx-ipuv3", NULL, ipu_clk)
1478 _REGISTER_CLOCK("imx-ipuv3", "di0", ipu_di0_clk)
1479 _REGISTER_CLOCK("imx-ipuv3", "di1", ipu_di1_clk)
1480 _REGISTER_CLOCK(NULL, "gpc_dvfs", gpc_dvfs_clk)
1481 _REGISTER_CLOCK("pata_imx", NULL, pata_clk)
1482 };
1483
1484 static struct clk_lookup mx53_lookups[] = {
1485 /* i.mx53 has the i.mx21 type uart */
1486 _REGISTER_CLOCK("imx21-uart.0", NULL, uart1_clk)
1487 _REGISTER_CLOCK("imx21-uart.1", NULL, uart2_clk)
1488 _REGISTER_CLOCK("imx21-uart.2", NULL, uart3_clk)
1489 _REGISTER_CLOCK("imx21-uart.3", NULL, uart4_clk)
1490 _REGISTER_CLOCK("imx21-uart.4", NULL, uart5_clk)
1491 _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
1492 /* i.mx53 has the i.mx25 type fec */
1493 _REGISTER_CLOCK("imx25-fec.0", NULL, fec_clk)
1494 _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
1495 _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
1496 _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
1497 _REGISTER_CLOCK("imx-i2c.2", NULL, i2c3_mx53_clk)
1498 /* i.mx53 has the i.mx51 type ecspi */
1499 _REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk)
1500 _REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk)
1501 /* i.mx53 has the i.mx25 type cspi */
1502 _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi_clk)
1503 _REGISTER_CLOCK("sdhci-esdhc-imx53.0", NULL, esdhc1_clk)
1504 _REGISTER_CLOCK("sdhci-esdhc-imx53.1", NULL, esdhc2_mx53_clk)
1505 _REGISTER_CLOCK("sdhci-esdhc-imx53.2", NULL, esdhc3_mx53_clk)
1506 _REGISTER_CLOCK("sdhci-esdhc-imx53.3", NULL, esdhc4_mx53_clk)
1507 _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)
1508 _REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk)
1509 /* i.mx53 has the i.mx35 type sdma */
1510 _REGISTER_CLOCK("imx35-sdma", NULL, sdma_clk)
1511 _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
1512 _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
1513 _REGISTER_CLOCK("imx-ssi.2", NULL, ssi3_clk)
1514 _REGISTER_CLOCK("imx-keypad", NULL, dummy_clk)
1515 _REGISTER_CLOCK("pata_imx", NULL, pata_clk)
1516 };
1517
1518 static void clk_tree_init(void)
1519 {
1520 u32 reg;
1521
1522 ipg_perclk.set_parent(&ipg_perclk, &lp_apm_clk);
1523
1524 /*
1525 * Initialise the IPG PER CLK dividers to 3. IPG_PER_CLK should be at
1526 * 8MHz, its derived from lp_apm.
1527 *
1528 * FIXME: Verify if true for all boards
1529 */
1530 reg = __raw_readl(MXC_CCM_CBCDR);
1531 reg &= ~MXC_CCM_CBCDR_PERCLK_PRED1_MASK;
1532 reg &= ~MXC_CCM_CBCDR_PERCLK_PRED2_MASK;
1533 reg &= ~MXC_CCM_CBCDR_PERCLK_PODF_MASK;
1534 reg |= (2 << MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET);
1535 __raw_writel(reg, MXC_CCM_CBCDR);
1536 }
1537
1538 int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
1539 unsigned long ckih1, unsigned long ckih2)
1540 {
1541 int i;
1542
1543 external_low_reference = ckil;
1544 external_high_reference = ckih1;
1545 ckih2_reference = ckih2;
1546 oscillator_reference = osc;
1547
1548 for (i = 0; i < ARRAY_SIZE(mx51_lookups); i++)
1549 clkdev_add(&mx51_lookups[i]);
1550
1551 clk_tree_init();
1552
1553 clk_enable(&cpu_clk);
1554 clk_enable(&main_bus_clk);
1555
1556 clk_enable(&iim_clk);
1557 imx_print_silicon_rev("i.MX51", mx51_revision());
1558 clk_disable(&iim_clk);
1559
1560 /* move usb_phy_clk to 24MHz */
1561 clk_set_parent(&usb_phy1_clk, &osc_clk);
1562
1563 /* set the usboh3_clk parent to pll2_sw_clk */
1564 clk_set_parent(&usboh3_clk, &pll2_sw_clk);
1565
1566 /* Set SDHC parents to be PLL2 */
1567 clk_set_parent(&esdhc1_clk, &pll2_sw_clk);
1568 clk_set_parent(&esdhc2_clk, &pll2_sw_clk);
1569
1570 /* set SDHC root clock as 166.25MHZ*/
1571 clk_set_rate(&esdhc1_clk, 166250000);
1572 clk_set_rate(&esdhc2_clk, 166250000);
1573
1574 /* System timer */
1575 mxc_timer_init(&gpt_clk, MX51_IO_ADDRESS(MX51_GPT1_BASE_ADDR),
1576 MX51_INT_GPT);
1577 return 0;
1578 }
1579
1580 int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
1581 unsigned long ckih1, unsigned long ckih2)
1582 {
1583 int i;
1584
1585 external_low_reference = ckil;
1586 external_high_reference = ckih1;
1587 ckih2_reference = ckih2;
1588 oscillator_reference = osc;
1589
1590 for (i = 0; i < ARRAY_SIZE(mx53_lookups); i++)
1591 clkdev_add(&mx53_lookups[i]);
1592
1593 clk_tree_init();
1594
1595 clk_set_parent(&uart_root_clk, &pll3_sw_clk);
1596 clk_enable(&cpu_clk);
1597 clk_enable(&main_bus_clk);
1598
1599 clk_enable(&iim_clk);
1600 imx_print_silicon_rev("i.MX53", mx53_revision());
1601 clk_disable(&iim_clk);
1602
1603 /* Set SDHC parents to be PLL2 */
1604 clk_set_parent(&esdhc1_clk, &pll2_sw_clk);
1605 clk_set_parent(&esdhc3_mx53_clk, &pll2_sw_clk);
1606
1607 /* set SDHC root clock as 200MHZ*/
1608 clk_set_rate(&esdhc1_clk, 200000000);
1609 clk_set_rate(&esdhc3_mx53_clk, 200000000);
1610
1611 /* System timer */
1612 mxc_timer_init(&gpt_clk, MX53_IO_ADDRESS(MX53_GPT1_BASE_ADDR),
1613 MX53_INT_GPT);
1614 return 0;
1615 }
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