2 * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@canonical.com>
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:
9 * http://www.opensource.org/licenses/gpl-license.html
10 * http://www.gnu.org/copyleft/gpl.html
14 #include <linux/delay.h>
15 #include <linux/clk.h>
18 #include <asm/clkdev.h>
20 #include <mach/hardware.h>
21 #include <mach/common.h>
22 #include <mach/clock.h>
26 /* External clock values passed-in by the board code */
27 static unsigned long external_high_reference, external_low_reference;
28 static unsigned long oscillator_reference, ckih2_reference;
30 static struct clk osc_clk;
31 static struct clk pll1_main_clk;
32 static struct clk pll1_sw_clk;
33 static struct clk pll2_sw_clk;
34 static struct clk pll3_sw_clk;
35 static struct clk lp_apm_clk;
36 static struct clk periph_apm_clk;
37 static struct clk ahb_clk;
38 static struct clk ipg_clk;
39 static struct clk usboh3_clk;
41 #define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */
43 static int _clk_ccgr_enable(struct clk *clk)
47 reg = __raw_readl(clk->enable_reg);
48 reg |= MXC_CCM_CCGRx_MOD_ON << clk->enable_shift;
49 __raw_writel(reg, clk->enable_reg);
54 static void _clk_ccgr_disable(struct clk *clk)
57 reg = __raw_readl(clk->enable_reg);
58 reg &= ~(MXC_CCM_CCGRx_MOD_OFF << clk->enable_shift);
59 __raw_writel(reg, clk->enable_reg);
63 static void _clk_ccgr_disable_inwait(struct clk *clk)
67 reg = __raw_readl(clk->enable_reg);
68 reg &= ~(MXC_CCM_CCGRx_CG_MASK << clk->enable_shift);
69 reg |= MXC_CCM_CCGRx_MOD_IDLE << clk->enable_shift;
70 __raw_writel(reg, clk->enable_reg);
74 * For the 4-to-1 muxed input clock
76 static inline u32 _get_mux(struct clk *parent, struct clk *m0,
77 struct clk *m1, struct clk *m2, struct clk *m3)
81 else if (parent == m1)
83 else if (parent == m2)
85 else if (parent == m3)
93 static inline void __iomem *_get_pll_base(struct clk *pll)
95 if (pll == &pll1_main_clk)
96 return MX51_DPLL1_BASE;
97 else if (pll == &pll2_sw_clk)
98 return MX51_DPLL2_BASE;
99 else if (pll == &pll3_sw_clk)
100 return MX51_DPLL3_BASE;
107 static unsigned long clk_pll_get_rate(struct clk *clk)
109 long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
110 unsigned long dp_op, dp_mfd, dp_mfn, dp_ctl, pll_hfsm, dbl;
111 void __iomem *pllbase;
113 unsigned long parent_rate;
115 parent_rate = clk_get_rate(clk->parent);
117 pllbase = _get_pll_base(clk);
119 dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
120 pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
121 dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN;
124 dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
125 dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
126 dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
128 dp_op = __raw_readl(pllbase + MXC_PLL_DP_HFS_OP);
129 dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFD);
130 dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFN);
132 pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
133 mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET;
134 mfi = (mfi <= 5) ? 5 : mfi;
135 mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
136 mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK;
137 /* Sign extend to 32-bits */
138 if (mfn >= 0x04000000) {
143 ref_clk = 2 * parent_rate;
147 ref_clk /= (pdf + 1);
148 temp = (u64) ref_clk * mfn_abs;
149 do_div(temp, mfd + 1);
152 temp = (ref_clk * mfi) + temp;
157 static int _clk_pll_set_rate(struct clk *clk, unsigned long rate)
160 void __iomem *pllbase;
162 long mfi, pdf, mfn, mfd = 999999;
164 unsigned long quad_parent_rate;
165 unsigned long pll_hfsm, dp_ctl;
166 unsigned long parent_rate;
168 parent_rate = clk_get_rate(clk->parent);
170 pllbase = _get_pll_base(clk);
172 quad_parent_rate = 4 * parent_rate;
174 while (++pdf < 16 && mfi < 5)
175 mfi = rate * (pdf+1) / quad_parent_rate;
180 temp64 = rate * (pdf+1) - quad_parent_rate * mfi;
181 do_div(temp64, quad_parent_rate/1000000);
184 dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
186 __raw_writel(dp_ctl | 0x1000L, pllbase + MXC_PLL_DP_CTL);
187 pll_hfsm = dp_ctl & MXC_PLL_DP_CTL_HFSM;
189 reg = mfi << 4 | pdf;
190 __raw_writel(reg, pllbase + MXC_PLL_DP_OP);
191 __raw_writel(mfd, pllbase + MXC_PLL_DP_MFD);
192 __raw_writel(mfn, pllbase + MXC_PLL_DP_MFN);
194 reg = mfi << 4 | pdf;
195 __raw_writel(reg, pllbase + MXC_PLL_DP_HFS_OP);
196 __raw_writel(mfd, pllbase + MXC_PLL_DP_HFS_MFD);
197 __raw_writel(mfn, pllbase + MXC_PLL_DP_HFS_MFN);
203 static int _clk_pll_enable(struct clk *clk)
206 void __iomem *pllbase;
209 pllbase = _get_pll_base(clk);
210 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN;
211 __raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
215 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
216 if (reg & MXC_PLL_DP_CTL_LRF)
220 } while (++i < MAX_DPLL_WAIT_TRIES);
222 if (i == MAX_DPLL_WAIT_TRIES) {
223 pr_err("MX5: pll locking failed\n");
230 static void _clk_pll_disable(struct clk *clk)
233 void __iomem *pllbase;
235 pllbase = _get_pll_base(clk);
236 reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) & ~MXC_PLL_DP_CTL_UPEN;
237 __raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
240 static int _clk_pll1_sw_set_parent(struct clk *clk, struct clk *parent)
244 reg = __raw_readl(MXC_CCM_CCSR);
246 /* When switching from pll_main_clk to a bypass clock, first select a
247 * multiplexed clock in 'step_sel', then shift the glitchless mux
250 * When switching back, do it in reverse order
252 if (parent == &pll1_main_clk) {
253 /* Switch to pll1_main_clk */
254 reg &= ~MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
255 __raw_writel(reg, MXC_CCM_CCSR);
256 /* step_clk mux switched to lp_apm, to save power. */
257 reg = __raw_readl(MXC_CCM_CCSR);
258 reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
259 reg |= (MXC_CCM_CCSR_STEP_SEL_LP_APM <<
260 MXC_CCM_CCSR_STEP_SEL_OFFSET);
262 if (parent == &lp_apm_clk) {
263 step = MXC_CCM_CCSR_STEP_SEL_LP_APM;
264 } else if (parent == &pll2_sw_clk) {
265 step = MXC_CCM_CCSR_STEP_SEL_PLL2_DIVIDED;
266 } else if (parent == &pll3_sw_clk) {
267 step = MXC_CCM_CCSR_STEP_SEL_PLL3_DIVIDED;
271 reg &= ~MXC_CCM_CCSR_STEP_SEL_MASK;
272 reg |= (step << MXC_CCM_CCSR_STEP_SEL_OFFSET);
274 __raw_writel(reg, MXC_CCM_CCSR);
275 /* Switch to step_clk */
276 reg = __raw_readl(MXC_CCM_CCSR);
277 reg |= MXC_CCM_CCSR_PLL1_SW_CLK_SEL;
279 __raw_writel(reg, MXC_CCM_CCSR);
283 static unsigned long clk_pll1_sw_get_rate(struct clk *clk)
286 unsigned long parent_rate;
288 parent_rate = clk_get_rate(clk->parent);
290 reg = __raw_readl(MXC_CCM_CCSR);
292 if (clk->parent == &pll2_sw_clk) {
293 div = ((reg & MXC_CCM_CCSR_PLL2_PODF_MASK) >>
294 MXC_CCM_CCSR_PLL2_PODF_OFFSET) + 1;
295 } else if (clk->parent == &pll3_sw_clk) {
296 div = ((reg & MXC_CCM_CCSR_PLL3_PODF_MASK) >>
297 MXC_CCM_CCSR_PLL3_PODF_OFFSET) + 1;
300 return parent_rate / div;
303 static int _clk_pll2_sw_set_parent(struct clk *clk, struct clk *parent)
307 reg = __raw_readl(MXC_CCM_CCSR);
309 if (parent == &pll2_sw_clk)
310 reg &= ~MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
312 reg |= MXC_CCM_CCSR_PLL2_SW_CLK_SEL;
314 __raw_writel(reg, MXC_CCM_CCSR);
318 static int _clk_lp_apm_set_parent(struct clk *clk, struct clk *parent)
322 if (parent == &osc_clk)
323 reg = __raw_readl(MXC_CCM_CCSR) & ~MXC_CCM_CCSR_LP_APM_SEL;
327 __raw_writel(reg, MXC_CCM_CCSR);
332 static unsigned long clk_arm_get_rate(struct clk *clk)
335 unsigned long parent_rate;
337 parent_rate = clk_get_rate(clk->parent);
338 cacrr = __raw_readl(MXC_CCM_CACRR);
339 div = (cacrr & MXC_CCM_CACRR_ARM_PODF_MASK) + 1;
341 return parent_rate / div;
344 static int _clk_periph_apm_set_parent(struct clk *clk, struct clk *parent)
349 mux = _get_mux(parent, &pll1_sw_clk, &pll3_sw_clk, &lp_apm_clk, NULL);
351 reg = __raw_readl(MXC_CCM_CBCMR) & ~MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK;
352 reg |= mux << MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET;
353 __raw_writel(reg, MXC_CCM_CBCMR);
357 reg = __raw_readl(MXC_CCM_CDHIPR);
358 if (!(reg & MXC_CCM_CDHIPR_PERIPH_CLK_SEL_BUSY))
362 } while (++i < MAX_DPLL_WAIT_TRIES);
364 if (i == MAX_DPLL_WAIT_TRIES) {
365 pr_err("MX5: Set parent for periph_apm clock failed\n");
372 static int _clk_main_bus_set_parent(struct clk *clk, struct clk *parent)
376 reg = __raw_readl(MXC_CCM_CBCDR);
378 if (parent == &pll2_sw_clk)
379 reg &= ~MXC_CCM_CBCDR_PERIPH_CLK_SEL;
380 else if (parent == &periph_apm_clk)
381 reg |= MXC_CCM_CBCDR_PERIPH_CLK_SEL;
385 __raw_writel(reg, MXC_CCM_CBCDR);
390 static struct clk main_bus_clk = {
391 .parent = &pll2_sw_clk,
392 .set_parent = _clk_main_bus_set_parent,
395 static unsigned long clk_ahb_get_rate(struct clk *clk)
398 unsigned long parent_rate;
400 parent_rate = clk_get_rate(clk->parent);
402 reg = __raw_readl(MXC_CCM_CBCDR);
403 div = ((reg & MXC_CCM_CBCDR_AHB_PODF_MASK) >>
404 MXC_CCM_CBCDR_AHB_PODF_OFFSET) + 1;
405 return parent_rate / div;
409 static int _clk_ahb_set_rate(struct clk *clk, unsigned long rate)
412 unsigned long parent_rate;
415 parent_rate = clk_get_rate(clk->parent);
417 div = parent_rate / rate;
418 if (div > 8 || div < 1 || ((parent_rate / div) != rate))
421 reg = __raw_readl(MXC_CCM_CBCDR);
422 reg &= ~MXC_CCM_CBCDR_AHB_PODF_MASK;
423 reg |= (div - 1) << MXC_CCM_CBCDR_AHB_PODF_OFFSET;
424 __raw_writel(reg, MXC_CCM_CBCDR);
428 reg = __raw_readl(MXC_CCM_CDHIPR);
429 if (!(reg & MXC_CCM_CDHIPR_AHB_PODF_BUSY))
433 } while (++i < MAX_DPLL_WAIT_TRIES);
435 if (i == MAX_DPLL_WAIT_TRIES) {
436 pr_err("MX5: clk_ahb_set_rate failed\n");
443 static unsigned long _clk_ahb_round_rate(struct clk *clk,
447 unsigned long parent_rate;
449 parent_rate = clk_get_rate(clk->parent);
451 div = parent_rate / rate;
456 return parent_rate / div;
460 static int _clk_max_enable(struct clk *clk)
464 _clk_ccgr_enable(clk);
466 /* Handshake with MAX when LPM is entered. */
467 reg = __raw_readl(MXC_CCM_CLPCR);
468 reg &= ~MXC_CCM_CLPCR_BYPASS_MAX_LPM_HS;
469 __raw_writel(reg, MXC_CCM_CLPCR);
474 static void _clk_max_disable(struct clk *clk)
478 _clk_ccgr_disable_inwait(clk);
480 /* No Handshake with MAX when LPM is entered as its disabled. */
481 reg = __raw_readl(MXC_CCM_CLPCR);
482 reg |= MXC_CCM_CLPCR_BYPASS_MAX_LPM_HS;
483 __raw_writel(reg, MXC_CCM_CLPCR);
486 static unsigned long clk_ipg_get_rate(struct clk *clk)
489 unsigned long parent_rate;
491 parent_rate = clk_get_rate(clk->parent);
493 reg = __raw_readl(MXC_CCM_CBCDR);
494 div = ((reg & MXC_CCM_CBCDR_IPG_PODF_MASK) >>
495 MXC_CCM_CBCDR_IPG_PODF_OFFSET) + 1;
497 return parent_rate / div;
500 static unsigned long clk_ipg_per_get_rate(struct clk *clk)
502 u32 reg, prediv1, prediv2, podf;
503 unsigned long parent_rate;
505 parent_rate = clk_get_rate(clk->parent);
507 if (clk->parent == &main_bus_clk || clk->parent == &lp_apm_clk) {
508 /* the main_bus_clk is the one before the DVFS engine */
509 reg = __raw_readl(MXC_CCM_CBCDR);
510 prediv1 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >>
511 MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET) + 1;
512 prediv2 = ((reg & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >>
513 MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET) + 1;
514 podf = ((reg & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >>
515 MXC_CCM_CBCDR_PERCLK_PODF_OFFSET) + 1;
516 return parent_rate / (prediv1 * prediv2 * podf);
517 } else if (clk->parent == &ipg_clk)
523 static int _clk_ipg_per_set_parent(struct clk *clk, struct clk *parent)
527 reg = __raw_readl(MXC_CCM_CBCMR);
529 reg &= ~MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
530 reg &= ~MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
532 if (parent == &ipg_clk)
533 reg |= MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL;
534 else if (parent == &lp_apm_clk)
535 reg |= MXC_CCM_CBCMR_PERCLK_LP_APM_CLK_SEL;
536 else if (parent != &main_bus_clk)
539 __raw_writel(reg, MXC_CCM_CBCMR);
544 static unsigned long clk_uart_get_rate(struct clk *clk)
546 u32 reg, prediv, podf;
547 unsigned long parent_rate;
549 parent_rate = clk_get_rate(clk->parent);
551 reg = __raw_readl(MXC_CCM_CSCDR1);
552 prediv = ((reg & MXC_CCM_CSCDR1_UART_CLK_PRED_MASK) >>
553 MXC_CCM_CSCDR1_UART_CLK_PRED_OFFSET) + 1;
554 podf = ((reg & MXC_CCM_CSCDR1_UART_CLK_PODF_MASK) >>
555 MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET) + 1;
557 return parent_rate / (prediv * podf);
560 static int _clk_uart_set_parent(struct clk *clk, struct clk *parent)
564 mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, &pll3_sw_clk,
566 reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_UART_CLK_SEL_MASK;
567 reg |= mux << MXC_CCM_CSCMR1_UART_CLK_SEL_OFFSET;
568 __raw_writel(reg, MXC_CCM_CSCMR1);
573 static unsigned long clk_usboh3_get_rate(struct clk *clk)
575 u32 reg, prediv, podf;
576 unsigned long parent_rate;
578 parent_rate = clk_get_rate(clk->parent);
580 reg = __raw_readl(MXC_CCM_CSCDR1);
581 prediv = ((reg & MXC_CCM_CSCDR1_USBOH3_CLK_PRED_MASK) >>
582 MXC_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET) + 1;
583 podf = ((reg & MXC_CCM_CSCDR1_USBOH3_CLK_PODF_MASK) >>
584 MXC_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET) + 1;
586 return parent_rate / (prediv * podf);
589 static int _clk_usboh3_set_parent(struct clk *clk, struct clk *parent)
593 mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, &pll3_sw_clk,
595 reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_USBOH3_CLK_SEL_MASK;
596 reg |= mux << MXC_CCM_CSCMR1_USBOH3_CLK_SEL_OFFSET;
597 __raw_writel(reg, MXC_CCM_CSCMR1);
602 static unsigned long get_high_reference_clock_rate(struct clk *clk)
604 return external_high_reference;
607 static unsigned long get_low_reference_clock_rate(struct clk *clk)
609 return external_low_reference;
612 static unsigned long get_oscillator_reference_clock_rate(struct clk *clk)
614 return oscillator_reference;
617 static unsigned long get_ckih2_reference_clock_rate(struct clk *clk)
619 return ckih2_reference;
622 /* External high frequency clock */
623 static struct clk ckih_clk = {
624 .get_rate = get_high_reference_clock_rate,
627 static struct clk ckih2_clk = {
628 .get_rate = get_ckih2_reference_clock_rate,
631 static struct clk osc_clk = {
632 .get_rate = get_oscillator_reference_clock_rate,
635 /* External low frequency (32kHz) clock */
636 static struct clk ckil_clk = {
637 .get_rate = get_low_reference_clock_rate,
640 static struct clk pll1_main_clk = {
642 .get_rate = clk_pll_get_rate,
643 .enable = _clk_pll_enable,
644 .disable = _clk_pll_disable,
647 /* Clock tree block diagram (WIP):
648 * CCM: Clock Controller Module
651 * | CCM Switcher -> CCM_CLK_ROOT_GEN ->
656 /* PLL1 SW supplies to ARM core */
657 static struct clk pll1_sw_clk = {
658 .parent = &pll1_main_clk,
659 .set_parent = _clk_pll1_sw_set_parent,
660 .get_rate = clk_pll1_sw_get_rate,
663 /* PLL2 SW supplies to AXI/AHB/IP buses */
664 static struct clk pll2_sw_clk = {
666 .get_rate = clk_pll_get_rate,
667 .set_rate = _clk_pll_set_rate,
668 .set_parent = _clk_pll2_sw_set_parent,
669 .enable = _clk_pll_enable,
670 .disable = _clk_pll_disable,
673 /* PLL3 SW supplies to serial clocks like USB, SSI, etc. */
674 static struct clk pll3_sw_clk = {
676 .set_rate = _clk_pll_set_rate,
677 .get_rate = clk_pll_get_rate,
678 .enable = _clk_pll_enable,
679 .disable = _clk_pll_disable,
682 /* Low-power Audio Playback Mode clock */
683 static struct clk lp_apm_clk = {
685 .set_parent = _clk_lp_apm_set_parent,
688 static struct clk periph_apm_clk = {
689 .parent = &pll1_sw_clk,
690 .set_parent = _clk_periph_apm_set_parent,
693 static struct clk cpu_clk = {
694 .parent = &pll1_sw_clk,
695 .get_rate = clk_arm_get_rate,
698 static struct clk ahb_clk = {
699 .parent = &main_bus_clk,
700 .get_rate = clk_ahb_get_rate,
701 .set_rate = _clk_ahb_set_rate,
702 .round_rate = _clk_ahb_round_rate,
705 /* Main IP interface clock for access to registers */
706 static struct clk ipg_clk = {
708 .get_rate = clk_ipg_get_rate,
711 static struct clk ipg_perclk = {
712 .parent = &lp_apm_clk,
713 .get_rate = clk_ipg_per_get_rate,
714 .set_parent = _clk_ipg_per_set_parent,
717 static struct clk uart_root_clk = {
718 .parent = &pll2_sw_clk,
719 .get_rate = clk_uart_get_rate,
720 .set_parent = _clk_uart_set_parent,
723 static struct clk usboh3_clk = {
724 .parent = &pll2_sw_clk,
725 .get_rate = clk_usboh3_get_rate,
726 .set_parent = _clk_usboh3_set_parent,
729 static struct clk ahb_max_clk = {
731 .enable_reg = MXC_CCM_CCGR0,
732 .enable_shift = MXC_CCM_CCGRx_CG14_OFFSET,
733 .enable = _clk_max_enable,
734 .disable = _clk_max_disable,
737 static struct clk aips_tz1_clk = {
739 .secondary = &ahb_max_clk,
740 .enable_reg = MXC_CCM_CCGR0,
741 .enable_shift = MXC_CCM_CCGRx_CG12_OFFSET,
742 .enable = _clk_ccgr_enable,
743 .disable = _clk_ccgr_disable_inwait,
746 static struct clk aips_tz2_clk = {
748 .secondary = &ahb_max_clk,
749 .enable_reg = MXC_CCM_CCGR0,
750 .enable_shift = MXC_CCM_CCGRx_CG13_OFFSET,
751 .enable = _clk_ccgr_enable,
752 .disable = _clk_ccgr_disable_inwait,
755 static struct clk gpt_32k_clk = {
760 #define DEFINE_CLOCK(name, i, er, es, gr, sr, p, s) \
761 static struct clk name = { \
764 .enable_shift = es, \
767 .enable = _clk_ccgr_enable, \
768 .disable = _clk_ccgr_disable, \
773 /* DEFINE_CLOCK(name, id, enable_reg, enable_shift,
774 get_rate, set_rate, parent, secondary); */
776 /* Shared peripheral bus arbiter */
777 DEFINE_CLOCK(spba_clk, 0, MXC_CCM_CCGR5, MXC_CCM_CCGRx_CG0_OFFSET,
778 NULL, NULL, &ipg_clk, NULL);
781 DEFINE_CLOCK(uart1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG4_OFFSET,
782 NULL, NULL, &uart_root_clk, NULL);
783 DEFINE_CLOCK(uart2_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG6_OFFSET,
784 NULL, NULL, &uart_root_clk, NULL);
785 DEFINE_CLOCK(uart3_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG8_OFFSET,
786 NULL, NULL, &uart_root_clk, NULL);
787 DEFINE_CLOCK(uart1_ipg_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG3_OFFSET,
788 NULL, NULL, &ipg_clk, &aips_tz1_clk);
789 DEFINE_CLOCK(uart2_ipg_clk, 1, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG5_OFFSET,
790 NULL, NULL, &ipg_clk, &aips_tz1_clk);
791 DEFINE_CLOCK(uart3_ipg_clk, 2, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG7_OFFSET,
792 NULL, NULL, &ipg_clk, &spba_clk);
795 DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG9_OFFSET,
796 NULL, NULL, &ipg_clk, NULL);
797 DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG10_OFFSET,
798 NULL, NULL, &ipg_clk, NULL);
801 DEFINE_CLOCK(fec_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG12_OFFSET,
802 NULL, NULL, &ipg_clk, NULL);
804 #define _REGISTER_CLOCK(d, n, c) \
811 static struct clk_lookup lookups[] = {
812 _REGISTER_CLOCK("imx-uart.0", NULL, uart1_clk)
813 _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk)
814 _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
815 _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
816 _REGISTER_CLOCK("fec.0", NULL, fec_clk)
817 _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk)
818 _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", ahb_clk)
819 _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)
820 _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", ahb_clk)
821 _REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk)
822 _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk)
825 static void clk_tree_init(void)
829 ipg_perclk.set_parent(&ipg_perclk, &lp_apm_clk);
832 * Initialise the IPG PER CLK dividers to 3. IPG_PER_CLK should be at
833 * 8MHz, its derived from lp_apm.
835 * FIXME: Verify if true for all boards
837 reg = __raw_readl(MXC_CCM_CBCDR);
838 reg &= ~MXC_CCM_CBCDR_PERCLK_PRED1_MASK;
839 reg &= ~MXC_CCM_CBCDR_PERCLK_PRED2_MASK;
840 reg &= ~MXC_CCM_CBCDR_PERCLK_PODF_MASK;
841 reg |= (2 << MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET);
842 __raw_writel(reg, MXC_CCM_CBCDR);
845 int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
846 unsigned long ckih1, unsigned long ckih2)
850 external_low_reference = ckil;
851 external_high_reference = ckih1;
852 ckih2_reference = ckih2;
853 oscillator_reference = osc;
855 for (i = 0; i < ARRAY_SIZE(lookups); i++)
856 clkdev_add(&lookups[i]);
860 clk_enable(&cpu_clk);
861 clk_enable(&main_bus_clk);
863 /* set the usboh3_clk parent to pll2_sw_clk */
864 clk_set_parent(&usboh3_clk, &pll2_sw_clk);
867 mxc_timer_init(&gpt_clk, MX51_IO_ADDRESS(MX51_GPT1_BASE_ADDR),