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ARM i.MX5 uart clock bug fix
[deliverable/linux.git] / arch / arm / mach-mx5 / clock-mx51-mx53.c
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
18 #include <asm/clkdev.h>
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
46 #define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */
47
48 /* calculate best pre and post dividers to get the required divider */
49 static void __calc_pre_post_dividers(u32 div, u32 *pre, u32 *post,
50 u32 max_pre, u32 max_post)
51 {
52 if (div >= max_pre * max_post) {
53 *pre = max_pre;
54 *post = max_post;
55 } else if (div >= max_pre) {
56 u32 min_pre, temp_pre, old_err, err;
57 min_pre = DIV_ROUND_UP(div, max_post);
58 old_err = max_pre;
59 for (temp_pre = max_pre; temp_pre >= min_pre; temp_pre--) {
60 err = div % temp_pre;
61 if (err == 0) {
62 *pre = temp_pre;
63 break;
64 }
65 err = temp_pre - err;
66 if (err < old_err) {
67 old_err = err;
68 *pre = temp_pre;
69 }
70 }
71 *post = DIV_ROUND_UP(div, *pre);
72 } else {
73 *pre = div;
74 *post = 1;
75 }
76 }
77
78 static void _clk_ccgr_setclk(struct clk *clk, unsigned mode)
79 {
80 u32 reg = __raw_readl(clk->enable_reg);
81
82 reg &= ~(MXC_CCM_CCGRx_CG_MASK << clk->enable_shift);
83 reg |= mode << clk->enable_shift;
84
85 __raw_writel(reg, clk->enable_reg);
86 }
87
88 static int _clk_ccgr_enable(struct clk *clk)
89 {
90 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_ON);
91 return 0;
92 }
93
94 static void _clk_ccgr_disable(struct clk *clk)
95 {
96 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_OFF);
97 }
98
99 static int _clk_ccgr_enable_inrun(struct clk *clk)
100 {
101 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_IDLE);
102 return 0;
103 }
104
105 static void _clk_ccgr_disable_inwait(struct clk *clk)
106 {
107 _clk_ccgr_setclk(clk, MXC_CCM_CCGRx_MOD_IDLE);
108 }
109
110 /*
111 * For the 4-to-1 muxed input clock
112 */
113 static inline u32 _get_mux(struct clk *parent, struct clk *m0,
114 struct clk *m1, struct clk *m2, struct clk *m3)
115 {
116 if (parent == m0)
117 return 0;
118 else if (parent == m1)
119 return 1;
120 else if (parent == m2)
121 return 2;
122 else if (parent == m3)
123 return 3;
124 else
125 BUG();
126
127 return -EINVAL;
128 }
129
130 static inline void __iomem *_mx51_get_pll_base(struct clk *pll)
131 {
132 if (pll == &pll1_main_clk)
133 return MX51_DPLL1_BASE;
134 else if (pll == &pll2_sw_clk)
135 return MX51_DPLL2_BASE;
136 else if (pll == &pll3_sw_clk)
137 return MX51_DPLL3_BASE;
138 else
139 BUG();
140
141 return NULL;
142 }
143
144 static inline void __iomem *_mx53_get_pll_base(struct clk *pll)
145 {
146 if (pll == &pll1_main_clk)
147 return MX53_DPLL1_BASE;
148 else if (pll == &pll2_sw_clk)
149 return MX53_DPLL2_BASE;
150 else if (pll == &pll3_sw_clk)
151 return MX53_DPLL3_BASE;
152 else if (pll == &mx53_pll4_sw_clk)
153 return MX53_DPLL4_BASE;
154 else
155 BUG();
156
157 return NULL;
158 }
159
160 static inline void __iomem *_get_pll_base(struct clk *pll)
161 {
162 if (cpu_is_mx51())
163 return _mx51_get_pll_base(pll);
164 else
165 return _mx53_get_pll_base(pll);
166 }
167
168 static unsigned long clk_pll_get_rate(struct clk *clk)
169 {
170 long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
171 unsigned long dp_op, dp_mfd, dp_mfn, dp_ctl, pll_hfsm, dbl;
172 void __iomem *pllbase;
173 s64 temp;
174 unsigned long parent_rate;
175
176 parent_rate = clk_get_rate(clk->parent);
177
178 pllbase = _get_pll_base(clk);
179
180 dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
181 pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
182 dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN;
183
184 if (pll_hfsm == 0) {
185 dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
186 dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
187 dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
188 } else {
189 dp_op = __raw_readl(pllbase + MXC_PLL_DP_HFS_OP);
190 dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFD);
191 dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFN);
192 }
193 pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
194 mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET;
195 mfi = (mfi <= 5) ? 5 : mfi;
196 mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
197 mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK;
198 /* Sign extend to 32-bits */
199 if (mfn >= 0x04000000) {
200 mfn |= 0xFC000000;
201 mfn_abs = -mfn;
202 }
203
204 ref_clk = 2 * parent_rate;
205 if (dbl != 0)
206 ref_clk *= 2;
207
208 ref_clk /= (pdf + 1);
209 temp = (u64) ref_clk * mfn_abs;
210 do_div(temp, mfd + 1);
211 if (mfn < 0)
212 temp = -temp;
213 temp = (ref_clk * mfi) + temp;
214
215 return temp;
216 }
217
218 static int _clk_pll_set_rate(struct clk *clk, unsigned long rate)
219 {
220 u32 reg;
221 void __iomem *pllbase;
222
223 long mfi, pdf, mfn, mfd = 999999;
224 s64 temp64;
225 unsigned long quad_parent_rate;
226 unsigned long pll_hfsm, dp_ctl;
227 unsigned long parent_rate;
228
229 parent_rate = clk_get_rate(clk->parent);
230
231 pllbase = _get_pll_base(clk);
232
233 quad_parent_rate = 4 * parent_rate;
234 pdf = mfi = -1;
235 while (++pdf < 16 && mfi < 5)
236 mfi = rate * (pdf+1) / quad_parent_rate;
237 if (mfi > 15)
238 return -EINVAL;
239 pdf--;
240
241 temp64 = rate * (pdf+1) - quad_parent_rate * mfi;
242 do_div(temp64, quad_parent_rate/1000000);
243 mfn = (long)temp64;
244
245 dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
246 /* use dpdck0_2 */
247 __raw_writel(dp_ctl | 0x1000L, pllbase + MXC_PLL_DP_CTL);
248 pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
249 if (pll_hfsm == 0) {
250 reg = mfi << 4 | pdf;
251 __raw_writel(reg, pllbase + MXC_PLL_DP_OP);
252 __raw_writel(mfd, pllbase + MXC_PLL_DP_MFD);
253 __raw_writel(mfn, pllbase + MXC_PLL_DP_MFN);
254 } else {
255 reg = mfi << 4 | pdf;
256 __raw_writel(reg, pllbase + MXC_PLL_DP_HFS_OP);
257 __raw_writel(mfd, pllbase + MXC_PLL_DP_HFS_MFD);
258 __raw_writel(mfn, pllbase + MXC_PLL_DP_HFS_MFN);
259 }
260
261 return 0;
262 }
263
264 static int _clk_pll_enable(struct clk *clk)
265 {
266 u32 reg;
267 void __iomem *pllbase;
268 int i = 0;
269
270 pllbase = _get_pll_base(clk);
271 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN;
272 __raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
273
274 /* Wait for lock */
275 do {
276 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
277 if (reg & MXC_PLL_DP_CTL_LRF)
278 break;
279
280 udelay(1);
281 } while (++i < MAX_DPLL_WAIT_TRIES);
282
283 if (i == MAX_DPLL_WAIT_TRIES) {
284 pr_err("MX5: pll locking failed\n");
285 return -EINVAL;
286 }
287
288 return 0;
289 }
290
291 static void _clk_pll_disable(struct clk *clk)
292 {
293 u32 reg;
294 void __iomem *pllbase;
295
296 pllbase = _get_pll_base(clk);
297 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) & ~MXC_PLL_DP_CTL_UPEN;
298 __raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
299 }
300
301 static int _clk_pll1_sw_set_parent(struct clk *clk, struct clk *parent)
302 {
303 u32 reg, step;
304
305 reg = __raw_readl(MXC_CCM_CCSR);
306
307 /* When switching from pll_main_clk to a bypass clock, first select a
308 * multiplexed clock in 'step_sel', then shift the glitchless mux
309 * 'pll1_sw_clk_sel'.
310 *
311 * When switching back, do it in reverse order
312 */
313 if (parent == &pll1_main_clk) {
314 /* Switch to pll1_main_clk */
315 reg &= ~MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
316 __raw_writel(reg, MXC_CCM_CCSR);
317 /* step_clk mux switched to lp_apm, to save power. */
318 reg = __raw_readl(MXC_CCM_CCSR);
319 reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
320 reg |= (MXC_CCM_CCSR_STEP_SEL_LP_APM <<
321 MXC_CCM_CCSR_STEP_SEL_OFFSET);
322 } else {
323 if (parent == &lp_apm_clk) {
324 step = MXC_CCM_CCSR_STEP_SEL_LP_APM;
325 } else if (parent == &pll2_sw_clk) {
326 step = MXC_CCM_CCSR_STEP_SEL_PLL2_DIVIDED;
327 } else if (parent == &pll3_sw_clk) {
328 step = MXC_CCM_CCSR_STEP_SEL_PLL3_DIVIDED;
329 } else
330 return -EINVAL;
331
332 reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
333 reg |= (step << MXC_CCM_CCSR_STEP_SEL_OFFSET);
334
335 __raw_writel(reg, MXC_CCM_CCSR);
336 /* Switch to step_clk */
337 reg = __raw_readl(MXC_CCM_CCSR);
338 reg |= MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
339 }
340 __raw_writel(reg, MXC_CCM_CCSR);
341 return 0;
342 }
343
344 static unsigned long clk_pll1_sw_get_rate(struct clk *clk)
345 {
346 u32 reg, div;
347 unsigned long parent_rate;
348
349 parent_rate = clk_get_rate(clk->parent);
350
351 reg = __raw_readl(MXC_CCM_CCSR);
352
353 if (clk->parent == &pll2_sw_clk) {
354 div = ((reg & MXC_CCM_CCSR_PLL2_PODF_MASK) >>
355 MXC_CCM_CCSR_PLL2_PODF_OFFSET) + 1;
356 } else if (clk->parent == &pll3_sw_clk) {
357 div = ((reg & MXC_CCM_CCSR_PLL3_PODF_MASK) >>
358 MXC_CCM_CCSR_PLL3_PODF_OFFSET) + 1;
359 } else
360 div = 1;
361 return parent_rate / div;
362 }
363
364 static int _clk_pll2_sw_set_parent(struct clk *clk, struct clk *parent)
365 {
366 u32 reg;
367
368 reg = __raw_readl(MXC_CCM_CCSR);
369
370 if (parent == &pll2_sw_clk)
371 reg &= ~MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
372 else
373 reg |= MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
374
375 __raw_writel(reg, MXC_CCM_CCSR);
376 return 0;
377 }
378
379 static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent)
380 {
381 u32 reg;
382
383 if (parent == &osc_clk)
384 reg = __raw_readl(MXC_CCM_CCSR) & ~MXC_CCM_CCSR_LP_APM_SEL;
385 else
386 return -EINVAL;
387
388 __raw_writel(reg, MXC_CCM_CCSR);
389
390 return 0;
391 }
392
393 static unsigned long clk_cpu_get_rate(struct clk *clk)
394 {
395 u32 cacrr, div;
396 unsigned long parent_rate;
397
398 parent_rate = clk_get_rate(clk->parent);
399 cacrr = __raw_readl(MXC_CCM_CACRR);
400 div = (cacrr & MXC_CCM_CACRR_ARM_PODF_MASK) + 1;
401
402 return parent_rate / div;
403 }
404
405 static int clk_cpu_set_rate(struct clk *clk, unsigned long rate)
406 {
407 u32 reg, cpu_podf;
408 unsigned long parent_rate;
409
410 parent_rate = clk_get_rate(clk->parent);
411 cpu_podf = parent_rate / rate - 1;
412 /* use post divider to change freq */
413 reg = __raw_readl(MXC_CCM_CACRR);
414 reg &= ~MXC_CCM_CACRR_ARM_PODF_MASK;
415 reg |= cpu_podf << MXC_CCM_CACRR_ARM_PODF_OFFSET;
416 __raw_writel(reg, MXC_CCM_CACRR);
417
418 return 0;
419 }
420
421 static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent)
422 {
423 u32 reg, mux;
424 int i = 0;
425
426 mux = _get_mux(parent, &pll1_sw_clk, &pll3_sw_clk, &lp_apm_clk, NULL);
427
428 reg = __raw_readl(MXC_CCM_CBCMR) & ~MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK;
429 reg |= mux << MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET;
430 __raw_writel(reg, MXC_CCM_CBCMR);
431
432 /* Wait for lock */
433 do {
434 reg = __raw_readl(MXC_CCM_CDHIPR);
435 if (!(reg & MXC_CCM_CDHIPR_PERIPH_CLK_SEL_BUSY))
436 break;
437
438 udelay(1);
439 } while (++i < MAX_DPLL_WAIT_TRIES);
440
441 if (i == MAX_DPLL_WAIT_TRIES) {
442 pr_err("MX5: Set parent for periph_apm clock failed\n");
443 return -EINVAL;
444 }
445
446 return 0;
447 }
448
449 static int _clk_main_bus_set_parent(struct clk *clk, struct clk *parent)
450 {
451 u32 reg;
452
453 reg = __raw_readl(MXC_CCM_CBCDR);
454
455 if (parent == &pll2_sw_clk)
456 reg &= ~MXC_CCM_CBCDR_PERIPH_CLK_SEL;
457 else if (parent == &periph_apm_clk)
458 reg |= MXC_CCM_CBCDR_PERIPH_CLK_SEL;
459 else
460 return -EINVAL;
461
462 __raw_writel(reg, MXC_CCM_CBCDR);
463
464 return 0;
465 }
466
467 static struct clk main_bus_clk = {
468 .parent = &pll2_sw_clk,
469 .set_parent = _clk_main_bus_set_parent,
470 };
471
472 static unsigned long clk_ahb_get_rate(struct clk *clk)
473 {
474 u32 reg, div;
475 unsigned long parent_rate;
476
477 parent_rate = clk_get_rate(clk->parent);
478
479 reg = __raw_readl(MXC_CCM_CBCDR);
480 div = ((reg & MXC_CCM_CBCDR_AHB_PODF_MASK) >>
481 MXC_CCM_CBCDR_AHB_PODF_OFFSET) + 1;
482 return parent_rate / div;
483 }
484
485
486 static int _clk_ahb_set_rate(struct clk *clk, unsigned long rate)
487 {
488 u32 reg, div;
489 unsigned long parent_rate;
490 int i = 0;
491
492 parent_rate = clk_get_rate(clk->parent);
493
494 div = parent_rate / rate;
495 if (div > 8 || div < 1 || ((parent_rate / div) != rate))
496 return -EINVAL;
497
498 reg = __raw_readl(MXC_CCM_CBCDR);
499 reg &= ~MXC_CCM_CBCDR_AHB_PODF_MASK;
500 reg |= (div - 1) << MXC_CCM_CBCDR_AHB_PODF_OFFSET;
501 __raw_writel(reg, MXC_CCM_CBCDR);
502
503 /* Wait for lock */
504 do {
505 reg = __raw_readl(MXC_CCM_CDHIPR);
506 if (!(reg & MXC_CCM_CDHIPR_AHB_PODF_BUSY))
507 break;
508
509 udelay(1);
510 } while (++i < MAX_DPLL_WAIT_TRIES);
511
512 if (i == MAX_DPLL_WAIT_TRIES) {
513 pr_err("MX5: clk_ahb_set_rate failed\n");
514 return -EINVAL;
515 }
516
517 return 0;
518 }
519
520 static unsigned long _clk_ahb_round_rate(struct clk *clk,
521 unsigned long rate)
522 {
523 u32 div;
524 unsigned long parent_rate;
525
526 parent_rate = clk_get_rate(clk->parent);
527
528 div = parent_rate / rate;
529 if (div > 8)
530 div = 8;
531 else if (div == 0)
532 div++;
533 return parent_rate / div;
534 }
535
536
537 static int _clk_max_enable(struct clk *clk)
538 {
539 u32 reg;
540
541 _clk_ccgr_enable(clk);
542
543 /* Handshake with MAX when LPM is entered. */
544 reg = __raw_readl(MXC_CCM_CLPCR);
545 if (cpu_is_mx51())
546 reg &= ~MX51_CCM_CLPCR_BYPASS_MAX_LPM_HS;
547 else if (cpu_is_mx53())
548 reg &= ~MX53_CCM_CLPCR_BYPASS_MAX_LPM_HS;
549 __raw_writel(reg, MXC_CCM_CLPCR);
550
551 return 0;
552 }
553
554 static void _clk_max_disable(struct clk *clk)
555 {
556 u32 reg;
557
558 _clk_ccgr_disable_inwait(clk);
559
560 /* No Handshake with MAX when LPM is entered as its disabled. */
561 reg = __raw_readl(MXC_CCM_CLPCR);
562 if (cpu_is_mx51())
563 reg |= MX51_CCM_CLPCR_BYPASS_MAX_LPM_HS;
564 else if (cpu_is_mx53())
565 reg &= ~MX53_CCM_CLPCR_BYPASS_MAX_LPM_HS;
566 __raw_writel(reg, MXC_CCM_CLPCR);
567 }
568
569 static unsigned long clk_ipg_get_rate(struct clk *clk)
570 {
571 u32 reg, div;
572 unsigned long parent_rate;
573
574 parent_rate = clk_get_rate(clk->parent);
575
576 reg = __raw_readl(MXC_CCM_CBCDR);
577 div = ((reg & MXC_CCM_CBCDR_IPG_PODF_MASK) >>
578 MXC_CCM_CBCDR_IPG_PODF_OFFSET) + 1;
579
580 return parent_rate / div;
581 }
582
583 static unsigned long clk_ipg_per_get_rate(struct clk *clk)
584 {
585 u32 reg, prediv1, prediv2, podf;
586 unsigned long parent_rate;
587
588 parent_rate = clk_get_rate(clk->parent);
589
590 if (clk->parent == &main_bus_clk || clk->parent == &lp_apm_clk) {
591 /* the main_bus_clk is the one before the DVFS engine */
592 reg = __raw_readl(MXC_CCM_CBCDR);
593 prediv1 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >>
594 MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET) + 1;
595 prediv2 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >>
596 MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET) + 1;
597 podf = ((reg & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >>
598 MXC_CCM_CBCDR_PERCLK_PODF_OFFSET) + 1;
599 return parent_rate / (prediv1 * prediv2 * podf);
600 } else if (clk->parent == &ipg_clk)
601 return parent_rate;
602 else
603 BUG();
604 }
605
606 static int _clk_ipg_per_set_parent(struct clk *clk, struct clk *parent)
607 {
608 u32 reg;
609
610 reg = __raw_readl(MXC_CCM_CBCMR);
611
612 reg &= ~MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
613 reg &= ~MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
614
615 if (parent == &ipg_clk)
616 reg |= MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
617 else if (parent == &lp_apm_clk)
618 reg |= MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
619 else if (parent != &main_bus_clk)
620 return -EINVAL;
621
622 __raw_writel(reg, MXC_CCM_CBCMR);
623
624 return 0;
625 }
626
627 #define clk_nfc_set_parent NULL
628
629 static unsigned long clk_nfc_get_rate(struct clk *clk)
630 {
631 unsigned long rate;
632 u32 reg, div;
633
634 reg = __raw_readl(MXC_CCM_CBCDR);
635 div = ((reg & MXC_CCM_CBCDR_NFC_PODF_MASK) >>
636 MXC_CCM_CBCDR_NFC_PODF_OFFSET) + 1;
637 rate = clk_get_rate(clk->parent) / div;
638 WARN_ON(rate == 0);
639 return rate;
640 }
641
642 static unsigned long clk_nfc_round_rate(struct clk *clk,
643 unsigned long rate)
644 {
645 u32 div;
646 unsigned long parent_rate = clk_get_rate(clk->parent);
647
648 if (!rate)
649 return -EINVAL;
650
651 div = parent_rate / rate;
652
653 if (parent_rate % rate)
654 div++;
655
656 if (div > 8)
657 return -EINVAL;
658
659 return parent_rate / div;
660
661 }
662
663 static int clk_nfc_set_rate(struct clk *clk, unsigned long rate)
664 {
665 u32 reg, div;
666
667 div = clk_get_rate(clk->parent) / rate;
668 if (div == 0)
669 div++;
670 if (((clk_get_rate(clk->parent) / div) != rate) || (div > 8))
671 return -EINVAL;
672
673 reg = __raw_readl(MXC_CCM_CBCDR);
674 reg &= ~MXC_CCM_CBCDR_NFC_PODF_MASK;
675 reg |= (div - 1) << MXC_CCM_CBCDR_NFC_PODF_OFFSET;
676 __raw_writel(reg, MXC_CCM_CBCDR);
677
678 while (__raw_readl(MXC_CCM_CDHIPR) &
679 MXC_CCM_CDHIPR_NFC_IPG_INT_MEM_PODF_BUSY){
680 }
681
682 return 0;
683 }
684
685 static unsigned long get_high_reference_clock_rate(struct clk *clk)
686 {
687 return external_high_reference;
688 }
689
690 static unsigned long get_low_reference_clock_rate(struct clk *clk)
691 {
692 return external_low_reference;
693 }
694
695 static unsigned long get_oscillator_reference_clock_rate(struct clk *clk)
696 {
697 return oscillator_reference;
698 }
699
700 static unsigned long get_ckih2_reference_clock_rate(struct clk *clk)
701 {
702 return ckih2_reference;
703 }
704
705 static unsigned long clk_emi_slow_get_rate(struct clk *clk)
706 {
707 u32 reg, div;
708
709 reg = __raw_readl(MXC_CCM_CBCDR);
710 div = ((reg & MXC_CCM_CBCDR_EMI_PODF_MASK) >>
711 MXC_CCM_CBCDR_EMI_PODF_OFFSET) + 1;
712
713 return clk_get_rate(clk->parent) / div;
714 }
715
716 static unsigned long _clk_ddr_hf_get_rate(struct clk *clk)
717 {
718 unsigned long rate;
719 u32 reg, div;
720
721 reg = __raw_readl(MXC_CCM_CBCDR);
722 div = ((reg & MXC_CCM_CBCDR_DDR_PODF_MASK) >>
723 MXC_CCM_CBCDR_DDR_PODF_OFFSET) + 1;
724 rate = clk_get_rate(clk->parent) / div;
725
726 return rate;
727 }
728
729 /* External high frequency clock */
730 static struct clk ckih_clk = {
731 .get_rate = get_high_reference_clock_rate,
732 };
733
734 static struct clk ckih2_clk = {
735 .get_rate = get_ckih2_reference_clock_rate,
736 };
737
738 static struct clk osc_clk = {
739 .get_rate = get_oscillator_reference_clock_rate,
740 };
741
742 /* External low frequency (32kHz) clock */
743 static struct clk ckil_clk = {
744 .get_rate = get_low_reference_clock_rate,
745 };
746
747 static struct clk pll1_main_clk = {
748 .parent = &osc_clk,
749 .get_rate = clk_pll_get_rate,
750 .enable = _clk_pll_enable,
751 .disable = _clk_pll_disable,
752 };
753
754 /* Clock tree block diagram (WIP):
755 * CCM: Clock Controller Module
756 *
757 * PLL output -> |
758 * | CCM Switcher -> CCM_CLK_ROOT_GEN ->
759 * PLL bypass -> |
760 *
761 */
762
763 /* PLL1 SW supplies to ARM core */
764 static struct clk pll1_sw_clk = {
765 .parent = &pll1_main_clk,
766 .set_parent = _clk_pll1_sw_set_parent,
767 .get_rate = clk_pll1_sw_get_rate,
768 };
769
770 /* PLL2 SW supplies to AXI/AHB/IP buses */
771 static struct clk pll2_sw_clk = {
772 .parent = &osc_clk,
773 .get_rate = clk_pll_get_rate,
774 .set_rate = _clk_pll_set_rate,
775 .set_parent = _clk_pll2_sw_set_parent,
776 .enable = _clk_pll_enable,
777 .disable = _clk_pll_disable,
778 };
779
780 /* PLL3 SW supplies to serial clocks like USB, SSI, etc. */
781 static struct clk pll3_sw_clk = {
782 .parent = &osc_clk,
783 .set_rate = _clk_pll_set_rate,
784 .get_rate = clk_pll_get_rate,
785 .enable = _clk_pll_enable,
786 .disable = _clk_pll_disable,
787 };
788
789 /* PLL4 SW supplies to LVDS Display Bridge(LDB) */
790 static struct clk mx53_pll4_sw_clk = {
791 .parent = &osc_clk,
792 .set_rate = _clk_pll_set_rate,
793 .enable = _clk_pll_enable,
794 .disable = _clk_pll_disable,
795 };
796
797 /* Low-power Audio Playback Mode clock */
798 static struct clk lp_apm_clk = {
799 .parent = &osc_clk,
800 .set_parent = _clk_lp_apm_set_parent,
801 };
802
803 static struct clk periph_apm_clk = {
804 .parent = &pll1_sw_clk,
805 .set_parent = _clk_periph_apm_set_parent,
806 };
807
808 static struct clk cpu_clk = {
809 .parent = &pll1_sw_clk,
810 .get_rate = clk_cpu_get_rate,
811 .set_rate = clk_cpu_set_rate,
812 };
813
814 static struct clk ahb_clk = {
815 .parent = &main_bus_clk,
816 .get_rate = clk_ahb_get_rate,
817 .set_rate = _clk_ahb_set_rate,
818 .round_rate = _clk_ahb_round_rate,
819 };
820
821 static struct clk iim_clk = {
822 .parent = &ipg_clk,
823 .enable_reg = MXC_CCM_CCGR0,
824 .enable_shift = MXC_CCM_CCGRx_CG15_OFFSET,
825 };
826
827 /* Main IP interface clock for access to registers */
828 static struct clk ipg_clk = {
829 .parent = &ahb_clk,
830 .get_rate = clk_ipg_get_rate,
831 };
832
833 static struct clk ipg_perclk = {
834 .parent = &lp_apm_clk,
835 .get_rate = clk_ipg_per_get_rate,
836 .set_parent = _clk_ipg_per_set_parent,
837 };
838
839 static struct clk ahb_max_clk = {
840 .parent = &ahb_clk,
841 .enable_reg = MXC_CCM_CCGR0,
842 .enable_shift = MXC_CCM_CCGRx_CG14_OFFSET,
843 .enable = _clk_max_enable,
844 .disable = _clk_max_disable,
845 };
846
847 static struct clk aips_tz1_clk = {
848 .parent = &ahb_clk,
849 .secondary = &ahb_max_clk,
850 .enable_reg = MXC_CCM_CCGR0,
851 .enable_shift = MXC_CCM_CCGRx_CG12_OFFSET,
852 .enable = _clk_ccgr_enable,
853 .disable = _clk_ccgr_disable_inwait,
854 };
855
856 static struct clk aips_tz2_clk = {
857 .parent = &ahb_clk,
858 .secondary = &ahb_max_clk,
859 .enable_reg = MXC_CCM_CCGR0,
860 .enable_shift = MXC_CCM_CCGRx_CG13_OFFSET,
861 .enable = _clk_ccgr_enable,
862 .disable = _clk_ccgr_disable_inwait,
863 };
864
865 static struct clk gpt_32k_clk = {
866 .id = 0,
867 .parent = &ckil_clk,
868 };
869
870 static struct clk kpp_clk = {
871 .id = 0,
872 };
873
874 static struct clk dummy_clk = {
875 .id = 0,
876 };
877
878 static struct clk emi_slow_clk = {
879 .parent = &pll2_sw_clk,
880 .enable_reg = MXC_CCM_CCGR5,
881 .enable_shift = MXC_CCM_CCGRx_CG8_OFFSET,
882 .enable = _clk_ccgr_enable,
883 .disable = _clk_ccgr_disable_inwait,
884 .get_rate = clk_emi_slow_get_rate,
885 };
886
887 static int clk_ipu_enable(struct clk *clk)
888 {
889 u32 reg;
890
891 _clk_ccgr_enable(clk);
892
893 /* Enable handshake with IPU when certain clock rates are changed */
894 reg = __raw_readl(MXC_CCM_CCDR);
895 reg &= ~MXC_CCM_CCDR_IPU_HS_MASK;
896 __raw_writel(reg, MXC_CCM_CCDR);
897
898 /* Enable handshake with IPU when LPM is entered */
899 reg = __raw_readl(MXC_CCM_CLPCR);
900 reg &= ~MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
901 __raw_writel(reg, MXC_CCM_CLPCR);
902
903 return 0;
904 }
905
906 static void clk_ipu_disable(struct clk *clk)
907 {
908 u32 reg;
909
910 _clk_ccgr_disable(clk);
911
912 /* Disable handshake with IPU whe dividers are changed */
913 reg = __raw_readl(MXC_CCM_CCDR);
914 reg |= MXC_CCM_CCDR_IPU_HS_MASK;
915 __raw_writel(reg, MXC_CCM_CCDR);
916
917 /* Disable handshake with IPU when LPM is entered */
918 reg = __raw_readl(MXC_CCM_CLPCR);
919 reg |= MXC_CCM_CLPCR_BYPASS_IPU_LPM_HS;
920 __raw_writel(reg, MXC_CCM_CLPCR);
921 }
922
923 static struct clk ahbmux1_clk = {
924 .parent = &ahb_clk,
925 .secondary = &ahb_max_clk,
926 .enable_reg = MXC_CCM_CCGR0,
927 .enable_shift = MXC_CCM_CCGRx_CG8_OFFSET,
928 .enable = _clk_ccgr_enable,
929 .disable = _clk_ccgr_disable_inwait,
930 };
931
932 static struct clk ipu_sec_clk = {
933 .parent = &emi_fast_clk,
934 .secondary = &ahbmux1_clk,
935 };
936
937 static struct clk ddr_hf_clk = {
938 .parent = &pll1_sw_clk,
939 .get_rate = _clk_ddr_hf_get_rate,
940 };
941
942 static struct clk ddr_clk = {
943 .parent = &ddr_hf_clk,
944 };
945
946 /* clock definitions for MIPI HSC unit which has been removed
947 * from documentation, but not from hardware
948 */
949 static int _clk_hsc_enable(struct clk *clk)
950 {
951 u32 reg;
952
953 _clk_ccgr_enable(clk);
954 /* Handshake with IPU when certain clock rates are changed. */
955 reg = __raw_readl(MXC_CCM_CCDR);
956 reg &= ~MXC_CCM_CCDR_HSC_HS_MASK;
957 __raw_writel(reg, MXC_CCM_CCDR);
958
959 reg = __raw_readl(MXC_CCM_CLPCR);
960 reg &= ~MXC_CCM_CLPCR_BYPASS_HSC_LPM_HS;
961 __raw_writel(reg, MXC_CCM_CLPCR);
962
963 return 0;
964 }
965
966 static void _clk_hsc_disable(struct clk *clk)
967 {
968 u32 reg;
969
970 _clk_ccgr_disable(clk);
971 /* No handshake with HSC as its not enabled. */
972 reg = __raw_readl(MXC_CCM_CCDR);
973 reg |= MXC_CCM_CCDR_HSC_HS_MASK;
974 __raw_writel(reg, MXC_CCM_CCDR);
975
976 reg = __raw_readl(MXC_CCM_CLPCR);
977 reg |= MXC_CCM_CLPCR_BYPASS_HSC_LPM_HS;
978 __raw_writel(reg, MXC_CCM_CLPCR);
979 }
980
981 static struct clk mipi_hsp_clk = {
982 .parent = &ipu_clk,
983 .enable_reg = MXC_CCM_CCGR4,
984 .enable_shift = MXC_CCM_CCGRx_CG6_OFFSET,
985 .enable = _clk_hsc_enable,
986 .disable = _clk_hsc_disable,
987 .secondary = &mipi_hsc1_clk,
988 };
989
990 #define DEFINE_CLOCK_CCGR(name, i, er, es, pfx, p, s) \
991 static struct clk name = { \
992 .id = i, \
993 .enable_reg = er, \
994 .enable_shift = es, \
995 .get_rate = pfx##_get_rate, \
996 .set_rate = pfx##_set_rate, \
997 .round_rate = pfx##_round_rate, \
998 .set_parent = pfx##_set_parent, \
999 .enable = _clk_ccgr_enable, \
1000 .disable = _clk_ccgr_disable, \
1001 .parent = p, \
1002 .secondary = s, \
1003 }
1004
1005 #define DEFINE_CLOCK_MAX(name, i, er, es, pfx, p, s) \
1006 static struct clk name = { \
1007 .id = i, \
1008 .enable_reg = er, \
1009 .enable_shift = es, \
1010 .get_rate = pfx##_get_rate, \
1011 .set_rate = pfx##_set_rate, \
1012 .set_parent = pfx##_set_parent, \
1013 .enable = _clk_max_enable, \
1014 .disable = _clk_max_disable, \
1015 .parent = p, \
1016 .secondary = s, \
1017 }
1018
1019 #define CLK_GET_RATE(name, nr, bitsname) \
1020 static unsigned long clk_##name##_get_rate(struct clk *clk) \
1021 { \
1022 u32 reg, pred, podf; \
1023 \
1024 reg = __raw_readl(MXC_CCM_CSCDR##nr); \
1025 pred = (reg & MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK) \
1026 >> MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET; \
1027 podf = (reg & MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK) \
1028 >> MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET; \
1029 \
1030 return DIV_ROUND_CLOSEST(clk_get_rate(clk->parent), \
1031 (pred + 1) * (podf + 1)); \
1032 }
1033
1034 #define CLK_SET_PARENT(name, nr, bitsname) \
1035 static int clk_##name##_set_parent(struct clk *clk, struct clk *parent) \
1036 { \
1037 u32 reg, mux; \
1038 \
1039 mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, \
1040 &pll3_sw_clk, &lp_apm_clk); \
1041 reg = __raw_readl(MXC_CCM_CSCMR##nr) & \
1042 ~MXC_CCM_CSCMR##nr##_##bitsname##_CLK_SEL_MASK; \
1043 reg |= mux << MXC_CCM_CSCMR##nr##_##bitsname##_CLK_SEL_OFFSET; \
1044 __raw_writel(reg, MXC_CCM_CSCMR##nr); \
1045 \
1046 return 0; \
1047 }
1048
1049 #define CLK_SET_RATE(name, nr, bitsname) \
1050 static int clk_##name##_set_rate(struct clk *clk, unsigned long rate) \
1051 { \
1052 u32 reg, div, parent_rate; \
1053 u32 pre = 0, post = 0; \
1054 \
1055 parent_rate = clk_get_rate(clk->parent); \
1056 div = parent_rate / rate; \
1057 \
1058 if ((parent_rate / div) != rate) \
1059 return -EINVAL; \
1060 \
1061 __calc_pre_post_dividers(div, &pre, &post, \
1062 (MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK >> \
1063 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET) + 1, \
1064 (MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK >> \
1065 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET) + 1);\
1066 \
1067 /* Set sdhc1 clock divider */ \
1068 reg = __raw_readl(MXC_CCM_CSCDR##nr) & \
1069 ~(MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_MASK \
1070 | MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_MASK); \
1071 reg |= (post - 1) << \
1072 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PODF_OFFSET; \
1073 reg |= (pre - 1) << \
1074 MXC_CCM_CSCDR##nr##_##bitsname##_CLK_PRED_OFFSET; \
1075 __raw_writel(reg, MXC_CCM_CSCDR##nr); \
1076 \
1077 return 0; \
1078 }
1079
1080 /* UART */
1081 CLK_GET_RATE(uart, 1, UART)
1082 CLK_SET_PARENT(uart, 1, UART)
1083
1084 static struct clk uart_root_clk = {
1085 .parent = &pll2_sw_clk,
1086 .get_rate = clk_uart_get_rate,
1087 .set_parent = clk_uart_set_parent,
1088 };
1089
1090 /* USBOH3 */
1091 CLK_GET_RATE(usboh3, 1, USBOH3)
1092 CLK_SET_PARENT(usboh3, 1, USBOH3)
1093
1094 static struct clk usboh3_clk = {
1095 .parent = &pll2_sw_clk,
1096 .get_rate = clk_usboh3_get_rate,
1097 .set_parent = clk_usboh3_set_parent,
1098 .enable = _clk_ccgr_enable,
1099 .disable = _clk_ccgr_disable,
1100 .enable_reg = MXC_CCM_CCGR2,
1101 .enable_shift = MXC_CCM_CCGRx_CG14_OFFSET,
1102 };
1103
1104 static struct clk usb_ahb_clk = {
1105 .parent = &ipg_clk,
1106 .enable = _clk_ccgr_enable,
1107 .disable = _clk_ccgr_disable,
1108 .enable_reg = MXC_CCM_CCGR2,
1109 .enable_shift = MXC_CCM_CCGRx_CG13_OFFSET,
1110 };
1111
1112 static int clk_usb_phy1_set_parent(struct clk *clk, struct clk *parent)
1113 {
1114 u32 reg;
1115
1116 reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL;
1117
1118 if (parent == &pll3_sw_clk)
1119 reg |= 1 << MXC_CCM_CSCMR1_USB_PHY_CLK_SEL_OFFSET;
1120
1121 __raw_writel(reg, MXC_CCM_CSCMR1);
1122
1123 return 0;
1124 }
1125
1126 static struct clk usb_phy1_clk = {
1127 .parent = &pll3_sw_clk,
1128 .set_parent = clk_usb_phy1_set_parent,
1129 .enable = _clk_ccgr_enable,
1130 .enable_reg = MXC_CCM_CCGR2,
1131 .enable_shift = MXC_CCM_CCGRx_CG0_OFFSET,
1132 .disable = _clk_ccgr_disable,
1133 };
1134
1135 /* eCSPI */
1136 CLK_GET_RATE(ecspi, 2, CSPI)
1137 CLK_SET_PARENT(ecspi, 1, CSPI)
1138
1139 static struct clk ecspi_main_clk = {
1140 .parent = &pll3_sw_clk,
1141 .get_rate = clk_ecspi_get_rate,
1142 .set_parent = clk_ecspi_set_parent,
1143 };
1144
1145 /* eSDHC */
1146 CLK_GET_RATE(esdhc1, 1, ESDHC1_MSHC1)
1147 CLK_SET_PARENT(esdhc1, 1, ESDHC1_MSHC1)
1148 CLK_SET_RATE(esdhc1, 1, ESDHC1_MSHC1)
1149
1150 CLK_GET_RATE(esdhc2, 1, ESDHC2_MSHC2)
1151 CLK_SET_PARENT(esdhc2, 1, ESDHC2_MSHC2)
1152 CLK_SET_RATE(esdhc2, 1, ESDHC2_MSHC2)
1153
1154 #define DEFINE_CLOCK_FULL(name, i, er, es, gr, sr, e, d, p, s) \
1155 static struct clk name = { \
1156 .id = i, \
1157 .enable_reg = er, \
1158 .enable_shift = es, \
1159 .get_rate = gr, \
1160 .set_rate = sr, \
1161 .enable = e, \
1162 .disable = d, \
1163 .parent = p, \
1164 .secondary = s, \
1165 }
1166
1167 #define DEFINE_CLOCK(name, i, er, es, gr, sr, p, s) \
1168 DEFINE_CLOCK_FULL(name, i, er, es, gr, sr, _clk_ccgr_enable, _clk_ccgr_disable, p, s)
1169
1170 /* Shared peripheral bus arbiter */
1171 DEFINE_CLOCK(spba_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG0_OFFSET,
1172 NULL, NULL, &ipg_clk, NULL);
1173
1174 /* UART */
1175 DEFINE_CLOCK(uart1_ipg_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG3_OFFSET,
1176 NULL, NULL, &ipg_clk, &aips_tz1_clk);
1177 DEFINE_CLOCK(uart2_ipg_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG5_OFFSET,
1178 NULL, NULL, &ipg_clk, &aips_tz1_clk);
1179 DEFINE_CLOCK(uart3_ipg_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG7_OFFSET,
1180 NULL, NULL, &ipg_clk, &spba_clk);
1181 DEFINE_CLOCK(uart1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG4_OFFSET,
1182 NULL, NULL, &uart_root_clk, &uart1_ipg_clk);
1183 DEFINE_CLOCK(uart2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG6_OFFSET,
1184 NULL, NULL, &uart_root_clk, &uart2_ipg_clk);
1185 DEFINE_CLOCK(uart3_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG8_OFFSET,
1186 NULL, NULL, &uart_root_clk, &uart3_ipg_clk);
1187
1188 /* GPT */
1189 DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG10_OFFSET,
1190 NULL, NULL, &ipg_clk, NULL);
1191 DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG9_OFFSET,
1192 NULL, NULL, &ipg_clk, &gpt_ipg_clk);
1193
1194 /* I2C */
1195 DEFINE_CLOCK(i2c1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG9_OFFSET,
1196 NULL, NULL, &ipg_clk, NULL);
1197 DEFINE_CLOCK(i2c2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG10_OFFSET,
1198 NULL, NULL, &ipg_clk, NULL);
1199 DEFINE_CLOCK(hsi2c_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG11_OFFSET,
1200 NULL, NULL, &ipg_clk, NULL);
1201
1202 /* FEC */
1203 DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
1204 NULL, NULL, &ipg_clk, NULL);
1205
1206 /* NFC */
1207 DEFINE_CLOCK_CCGR(nfc_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG10_OFFSET,
1208 clk_nfc, &emi_slow_clk, NULL);
1209
1210 /* SSI */
1211 DEFINE_CLOCK(ssi1_ipg_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG8_OFFSET,
1212 NULL, NULL, &ipg_clk, NULL);
1213 DEFINE_CLOCK(ssi1_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG9_OFFSET,
1214 NULL, NULL, &pll3_sw_clk, &ssi1_ipg_clk);
1215 DEFINE_CLOCK(ssi2_ipg_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG10_OFFSET,
1216 NULL, NULL, &ipg_clk, NULL);
1217 DEFINE_CLOCK(ssi2_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG11_OFFSET,
1218 NULL, NULL, &pll3_sw_clk, &ssi2_ipg_clk);
1219 DEFINE_CLOCK(ssi3_ipg_clk, 2, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG12_OFFSET,
1220 NULL, NULL, &ipg_clk, NULL);
1221 DEFINE_CLOCK(ssi3_clk, 2, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG13_OFFSET,
1222 NULL, NULL, &pll3_sw_clk, &ssi3_ipg_clk);
1223
1224 /* eCSPI */
1225 DEFINE_CLOCK_FULL(ecspi1_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG9_OFFSET,
1226 NULL, NULL, _clk_ccgr_enable_inrun, _clk_ccgr_disable,
1227 &ipg_clk, &spba_clk);
1228 DEFINE_CLOCK(ecspi1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG10_OFFSET,
1229 NULL, NULL, &ecspi_main_clk, &ecspi1_ipg_clk);
1230 DEFINE_CLOCK_FULL(ecspi2_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG11_OFFSET,
1231 NULL, NULL, _clk_ccgr_enable_inrun, _clk_ccgr_disable,
1232 &ipg_clk, &aips_tz2_clk);
1233 DEFINE_CLOCK(ecspi2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG12_OFFSET,
1234 NULL, NULL, &ecspi_main_clk, &ecspi2_ipg_clk);
1235
1236 /* CSPI */
1237 DEFINE_CLOCK(cspi_ipg_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG9_OFFSET,
1238 NULL, NULL, &ipg_clk, &aips_tz2_clk);
1239 DEFINE_CLOCK(cspi_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG13_OFFSET,
1240 NULL, NULL, &ipg_clk, &cspi_ipg_clk);
1241
1242 /* SDMA */
1243 DEFINE_CLOCK(sdma_clk, 1, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG15_OFFSET,
1244 NULL, NULL, &ahb_clk, NULL);
1245
1246 /* eSDHC */
1247 DEFINE_CLOCK_FULL(esdhc1_ipg_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG0_OFFSET,
1248 NULL, NULL, _clk_max_enable, _clk_max_disable, &ipg_clk, NULL);
1249 DEFINE_CLOCK_MAX(esdhc1_clk, 0, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG1_OFFSET,
1250 clk_esdhc1, &pll2_sw_clk, &esdhc1_ipg_clk);
1251 DEFINE_CLOCK_FULL(esdhc2_ipg_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG2_OFFSET,
1252 NULL, NULL, _clk_max_enable, _clk_max_disable, &ipg_clk, NULL);
1253 DEFINE_CLOCK_MAX(esdhc2_clk, 1, MXC_CCM_CCGR3, MXC_CCM_CCGRx_CG3_OFFSET,
1254 clk_esdhc2, &pll2_sw_clk, &esdhc2_ipg_clk);
1255
1256 DEFINE_CLOCK(mipi_esc_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG5_OFFSET, NULL, NULL, NULL, &pll2_sw_clk);
1257 DEFINE_CLOCK(mipi_hsc2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG4_OFFSET, NULL, NULL, &mipi_esc_clk, &pll2_sw_clk);
1258 DEFINE_CLOCK(mipi_hsc1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG3_OFFSET, NULL, NULL, &mipi_hsc2_clk, &pll2_sw_clk);
1259
1260 /* IPU */
1261 DEFINE_CLOCK_FULL(ipu_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG5_OFFSET,
1262 NULL, NULL, clk_ipu_enable, clk_ipu_disable, &ahb_clk, &ipu_sec_clk);
1263
1264 DEFINE_CLOCK_FULL(emi_fast_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG7_OFFSET,
1265 NULL, NULL, _clk_ccgr_enable, _clk_ccgr_disable_inwait,
1266 &ddr_clk, NULL);
1267
1268 DEFINE_CLOCK(ipu_di0_clk, 0, MXC_CCM_CCGR6, MXC_CCM_CCGRx_CG5_OFFSET,
1269 NULL, NULL, &pll3_sw_clk, NULL);
1270 DEFINE_CLOCK(ipu_di1_clk, 0, MXC_CCM_CCGR6, MXC_CCM_CCGRx_CG6_OFFSET,
1271 NULL, NULL, &pll3_sw_clk, NULL);
1272
1273 #define _REGISTER_CLOCK(d, n, c) \
1274 { \
1275 .dev_id = d, \
1276 .con_id = n, \
1277 .clk = &c, \
1278 },
1279
1280 static struct clk_lookup mx51_lookups[] = {
1281 _REGISTER_CLOCK("imx-uart.0", NULL, uart1_clk)
1282 _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk)
1283 _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
1284 _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
1285 _REGISTER_CLOCK("fec.0", NULL, fec_clk)
1286 _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
1287 _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
1288 _REGISTER_CLOCK("imx-i2c.2", NULL, hsi2c_clk)
1289 _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk)
1290 _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", usb_ahb_clk)
1291 _REGISTER_CLOCK("mxc-ehci.0", "usb_phy1", usb_phy1_clk)
1292 _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)
1293 _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", usb_ahb_clk)
1294 _REGISTER_CLOCK("mxc-ehci.2", "usb", usboh3_clk)
1295 _REGISTER_CLOCK("mxc-ehci.2", "usb_ahb", usb_ahb_clk)
1296 _REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk)
1297 _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk)
1298 _REGISTER_CLOCK("imx-keypad.0", NULL, kpp_clk)
1299 _REGISTER_CLOCK("mxc_nand", NULL, nfc_clk)
1300 _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
1301 _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
1302 _REGISTER_CLOCK("imx-ssi.2", NULL, ssi3_clk)
1303 _REGISTER_CLOCK("imx-sdma", NULL, sdma_clk)
1304 _REGISTER_CLOCK(NULL, "ckih", ckih_clk)
1305 _REGISTER_CLOCK(NULL, "ckih2", ckih2_clk)
1306 _REGISTER_CLOCK(NULL, "gpt_32k", gpt_32k_clk)
1307 _REGISTER_CLOCK("imx51-ecspi.0", NULL, ecspi1_clk)
1308 _REGISTER_CLOCK("imx51-ecspi.1", NULL, ecspi2_clk)
1309 _REGISTER_CLOCK("imx51-cspi.0", NULL, cspi_clk)
1310 _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
1311 _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
1312 _REGISTER_CLOCK(NULL, "cpu_clk", cpu_clk)
1313 _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
1314 _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk)
1315 _REGISTER_CLOCK("imx2-wdt.1", NULL, dummy_clk)
1316 _REGISTER_CLOCK(NULL, "mipi_hsp", mipi_hsp_clk)
1317 _REGISTER_CLOCK("imx-ipuv3", NULL, ipu_clk)
1318 _REGISTER_CLOCK("imx-ipuv3", "di0", ipu_di0_clk)
1319 _REGISTER_CLOCK("imx-ipuv3", "di1", ipu_di1_clk)
1320 };
1321
1322 static struct clk_lookup mx53_lookups[] = {
1323 _REGISTER_CLOCK("imx-uart.0", NULL, uart1_clk)
1324 _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk)
1325 _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
1326 _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
1327 _REGISTER_CLOCK("fec.0", NULL, fec_clk)
1328 _REGISTER_CLOCK(NULL, "iim_clk", iim_clk)
1329 _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
1330 _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
1331 _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
1332 _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
1333 _REGISTER_CLOCK("imx53-ecspi.0", NULL, ecspi1_clk)
1334 _REGISTER_CLOCK("imx53-ecspi.1", NULL, ecspi2_clk)
1335 _REGISTER_CLOCK("imx53-cspi.0", NULL, cspi_clk)
1336 };
1337
1338 static void clk_tree_init(void)
1339 {
1340 u32 reg;
1341
1342 ipg_perclk.set_parent(&ipg_perclk, &lp_apm_clk);
1343
1344 /*
1345 * Initialise the IPG PER CLK dividers to 3. IPG_PER_CLK should be at
1346 * 8MHz, its derived from lp_apm.
1347 *
1348 * FIXME: Verify if true for all boards
1349 */
1350 reg = __raw_readl(MXC_CCM_CBCDR);
1351 reg &= ~MXC_CCM_CBCDR_PERCLK_PRED1_MASK;
1352 reg &= ~MXC_CCM_CBCDR_PERCLK_PRED2_MASK;
1353 reg &= ~MXC_CCM_CBCDR_PERCLK_PODF_MASK;
1354 reg |= (2 << MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET);
1355 __raw_writel(reg, MXC_CCM_CBCDR);
1356 }
1357
1358 int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
1359 unsigned long ckih1, unsigned long ckih2)
1360 {
1361 int i;
1362
1363 external_low_reference = ckil;
1364 external_high_reference = ckih1;
1365 ckih2_reference = ckih2;
1366 oscillator_reference = osc;
1367
1368 for (i = 0; i < ARRAY_SIZE(mx51_lookups); i++)
1369 clkdev_add(&mx51_lookups[i]);
1370
1371 clk_tree_init();
1372
1373 clk_enable(&cpu_clk);
1374 clk_enable(&main_bus_clk);
1375
1376 clk_enable(&iim_clk);
1377 mx51_revision();
1378 clk_disable(&iim_clk);
1379
1380 /* move usb_phy_clk to 24MHz */
1381 clk_set_parent(&usb_phy1_clk, &osc_clk);
1382
1383 /* set the usboh3_clk parent to pll2_sw_clk */
1384 clk_set_parent(&usboh3_clk, &pll2_sw_clk);
1385
1386 /* Set SDHC parents to be PLL2 */
1387 clk_set_parent(&esdhc1_clk, &pll2_sw_clk);
1388 clk_set_parent(&esdhc2_clk, &pll2_sw_clk);
1389
1390 /* set SDHC root clock as 166.25MHZ*/
1391 clk_set_rate(&esdhc1_clk, 166250000);
1392 clk_set_rate(&esdhc2_clk, 166250000);
1393
1394 /* System timer */
1395 mxc_timer_init(&gpt_clk, MX51_IO_ADDRESS(MX51_GPT1_BASE_ADDR),
1396 MX51_MXC_INT_GPT);
1397 return 0;
1398 }
1399
1400 int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
1401 unsigned long ckih1, unsigned long ckih2)
1402 {
1403 int i;
1404
1405 external_low_reference = ckil;
1406 external_high_reference = ckih1;
1407 ckih2_reference = ckih2;
1408 oscillator_reference = osc;
1409
1410 for (i = 0; i < ARRAY_SIZE(mx53_lookups); i++)
1411 clkdev_add(&mx53_lookups[i]);
1412
1413 clk_tree_init();
1414
1415 clk_set_parent(&uart_root_clk, &pll3_sw_clk);
1416 clk_enable(&cpu_clk);
1417 clk_enable(&main_bus_clk);
1418
1419 clk_enable(&iim_clk);
1420 mx53_revision();
1421 clk_disable(&iim_clk);
1422
1423 /* System timer */
1424 mxc_timer_init(&gpt_clk, MX53_IO_ADDRESS(MX53_GPT1_BASE_ADDR),
1425 MX53_INT_GPT);
1426 return 0;
1427 }
Linux kernel - Deliverables
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