3 * Sascha Hauer, Pengutronix
5 * (C) Copyright 2009 Freescale Semiconductor, Inc.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 #include <asm/errno.h>
29 #include <asm/arch/imx-regs.h>
30 #include <asm/arch/crm_regs.h>
31 #include <asm/arch/clock.h>
33 #include <asm/arch/sys_proto.h>
43 struct mxc_pll_reg *mxc_plls[PLL_CLOCKS] = {
44 [PLL1_CLOCK] = (struct mxc_pll_reg *)PLL1_BASE_ADDR,
45 [PLL2_CLOCK] = (struct mxc_pll_reg *)PLL2_BASE_ADDR,
46 [PLL3_CLOCK] = (struct mxc_pll_reg *)PLL3_BASE_ADDR,
48 [PLL4_CLOCK] = (struct mxc_pll_reg *)PLL4_BASE_ADDR,
52 #define AHB_CLK_ROOT 133333333
53 #define SZ_DEC_1M 1000000
54 #define PLL_PD_MAX 16 /* Actual pd+1 */
55 #define PLL_MFI_MAX 15
63 struct fixed_pll_mfd {
68 const struct fixed_pll_mfd fixed_mfd[] = {
69 {CONFIG_SYS_MX5_HCLK, 24 * 16},
79 #define PLL_FREQ_MAX(ref_clk) (4 * (ref_clk) * PLL_MFI_MAX)
80 #define PLL_FREQ_MIN(ref_clk) \
81 ((2 * (ref_clk) * (PLL_MFI_MIN - 1)) / PLL_PD_MAX)
82 #define MAX_DDR_CLK 420000000
83 #define NFC_CLK_MAX 34000000
85 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)MXC_CCM_BASE;
87 void set_usboh3_clk(void)
91 reg = readl(&mxc_ccm->cscmr1) &
92 ~MXC_CCM_CSCMR1_USBOH3_CLK_SEL_MASK;
93 reg |= 1 << MXC_CCM_CSCMR1_USBOH3_CLK_SEL_OFFSET;
94 writel(reg, &mxc_ccm->cscmr1);
96 reg = readl(&mxc_ccm->cscdr1);
97 reg &= ~MXC_CCM_CSCDR1_USBOH3_CLK_PODF_MASK;
98 reg &= ~MXC_CCM_CSCDR1_USBOH3_CLK_PRED_MASK;
99 reg |= 4 << MXC_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET;
100 reg |= 1 << MXC_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET;
102 writel(reg, &mxc_ccm->cscdr1);
105 void enable_usboh3_clk(unsigned char enable)
109 reg = readl(&mxc_ccm->CCGR2);
111 reg |= 1 << MXC_CCM_CCGR2_CG14_OFFSET;
113 reg &= ~(1 << MXC_CCM_CCGR2_CG14_OFFSET);
114 writel(reg, &mxc_ccm->CCGR2);
117 void set_usb_phy1_clk(void)
121 reg = readl(&mxc_ccm->cscmr1);
122 reg &= ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL;
123 writel(reg, &mxc_ccm->cscmr1);
126 void enable_usb_phy1_clk(unsigned char enable)
130 reg = readl(&mxc_ccm->CCGR4);
132 reg |= 1 << MXC_CCM_CCGR4_CG5_OFFSET;
134 reg &= ~(1 << MXC_CCM_CCGR4_CG5_OFFSET);
135 writel(reg, &mxc_ccm->CCGR4);
138 void set_usb_phy2_clk(void)
142 reg = readl(&mxc_ccm->cscmr1);
143 reg &= ~MXC_CCM_CSCMR1_USB_PHY_CLK_SEL;
144 writel(reg, &mxc_ccm->cscmr1);
147 void enable_usb_phy2_clk(unsigned char enable)
151 reg = readl(&mxc_ccm->CCGR4);
153 reg |= 1 << MXC_CCM_CCGR4_CG6_OFFSET;
155 reg &= ~(1 << MXC_CCM_CCGR4_CG6_OFFSET);
156 writel(reg, &mxc_ccm->CCGR4);
160 * Calculate the frequency of PLLn.
162 static uint32_t decode_pll(struct mxc_pll_reg *pll, uint32_t infreq)
164 uint32_t ctrl, op, mfd, mfn, mfi, pdf, ret;
165 uint64_t refclk, temp;
168 ctrl = readl(&pll->ctrl);
170 if (ctrl & MXC_DPLLC_CTL_HFSM) {
171 mfn = __raw_readl(&pll->hfs_mfn);
172 mfd = __raw_readl(&pll->hfs_mfd);
173 op = __raw_readl(&pll->hfs_op);
175 mfn = __raw_readl(&pll->mfn);
176 mfd = __raw_readl(&pll->mfd);
177 op = __raw_readl(&pll->op);
180 mfd &= MXC_DPLLC_MFD_MFD_MASK;
181 mfn &= MXC_DPLLC_MFN_MFN_MASK;
182 pdf = op & MXC_DPLLC_OP_PDF_MASK;
183 mfi = (op & MXC_DPLLC_OP_MFI_MASK) >> MXC_DPLLC_OP_MFI_OFFSET;
190 if (mfn >= 0x04000000) {
197 if (ctrl & MXC_DPLLC_CTL_DPDCK0_2_EN)
200 do_div(refclk, pdf + 1);
201 temp = refclk * mfn_abs;
202 do_div(temp, mfd + 1);
216 u32 get_mcu_main_clk(void)
220 reg = (__raw_readl(&mxc_ccm->cacrr) & MXC_CCM_CACRR_ARM_PODF_MASK) >>
221 MXC_CCM_CACRR_ARM_PODF_OFFSET;
222 freq = decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK);
223 return freq / (reg + 1);
227 * Get the rate of peripheral's root clock.
229 u32 get_periph_clk(void)
233 reg = __raw_readl(&mxc_ccm->cbcdr);
234 if (!(reg & MXC_CCM_CBCDR_PERIPH_CLK_SEL))
235 return decode_pll(mxc_plls[PLL2_CLOCK], CONFIG_SYS_MX5_HCLK);
236 reg = __raw_readl(&mxc_ccm->cbcmr);
237 switch ((reg & MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK) >>
238 MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET) {
240 return decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK);
242 return decode_pll(mxc_plls[PLL3_CLOCK], CONFIG_SYS_MX5_HCLK);
250 * Get the rate of ipg clock.
252 static u32 get_ipg_clk(void)
254 uint32_t freq, reg, div;
256 freq = get_ahb_clk();
258 reg = __raw_readl(&mxc_ccm->cbcdr);
259 div = ((reg & MXC_CCM_CBCDR_IPG_PODF_MASK) >>
260 MXC_CCM_CBCDR_IPG_PODF_OFFSET) + 1;
266 * Get the rate of ipg_per clock.
268 static u32 get_ipg_per_clk(void)
270 u32 pred1, pred2, podf;
272 if (__raw_readl(&mxc_ccm->cbcmr) & MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL)
273 return get_ipg_clk();
274 /* Fixme: not handle what about lpm*/
275 podf = __raw_readl(&mxc_ccm->cbcdr);
276 pred1 = (podf & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >>
277 MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET;
278 pred2 = (podf & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >>
279 MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET;
280 podf = (podf & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >>
281 MXC_CCM_CBCDR_PERCLK_PODF_OFFSET;
283 return get_periph_clk() / ((pred1 + 1) * (pred2 + 1) * (podf + 1));
287 * Get the rate of uart clk.
289 static u32 get_uart_clk(void)
291 unsigned int freq, reg, pred, podf;
293 reg = __raw_readl(&mxc_ccm->cscmr1);
294 switch ((reg & MXC_CCM_CSCMR1_UART_CLK_SEL_MASK) >>
295 MXC_CCM_CSCMR1_UART_CLK_SEL_OFFSET) {
297 freq = decode_pll(mxc_plls[PLL1_CLOCK],
298 CONFIG_SYS_MX5_HCLK);
301 freq = decode_pll(mxc_plls[PLL2_CLOCK],
302 CONFIG_SYS_MX5_HCLK);
305 freq = decode_pll(mxc_plls[PLL3_CLOCK],
306 CONFIG_SYS_MX5_HCLK);
312 reg = __raw_readl(&mxc_ccm->cscdr1);
314 pred = (reg & MXC_CCM_CSCDR1_UART_CLK_PRED_MASK) >>
315 MXC_CCM_CSCDR1_UART_CLK_PRED_OFFSET;
317 podf = (reg & MXC_CCM_CSCDR1_UART_CLK_PODF_MASK) >>
318 MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET;
319 freq /= (pred + 1) * (podf + 1);
325 * This function returns the low power audio clock.
327 static u32 get_lp_apm(void)
330 u32 ccsr = __raw_readl(&mxc_ccm->ccsr);
332 if (((ccsr >> 9) & 1) == 0)
333 ret_val = CONFIG_SYS_MX5_HCLK;
335 ret_val = ((32768 * 1024));
341 * get cspi clock rate.
343 static u32 imx_get_cspiclk(void)
345 u32 ret_val = 0, pdf, pre_pdf, clk_sel;
346 u32 cscmr1 = __raw_readl(&mxc_ccm->cscmr1);
347 u32 cscdr2 = __raw_readl(&mxc_ccm->cscdr2);
349 pre_pdf = (cscdr2 & MXC_CCM_CSCDR2_CSPI_CLK_PRED_MASK) \
350 >> MXC_CCM_CSCDR2_CSPI_CLK_PRED_OFFSET;
351 pdf = (cscdr2 & MXC_CCM_CSCDR2_CSPI_CLK_PODF_MASK) \
352 >> MXC_CCM_CSCDR2_CSPI_CLK_PODF_OFFSET;
353 clk_sel = (cscmr1 & MXC_CCM_CSCMR1_CSPI_CLK_SEL_MASK) \
354 >> MXC_CCM_CSCMR1_CSPI_CLK_SEL_OFFSET;
358 ret_val = decode_pll(mxc_plls[PLL1_CLOCK],
359 CONFIG_SYS_MX5_HCLK) /
360 ((pre_pdf + 1) * (pdf + 1));
363 ret_val = decode_pll(mxc_plls[PLL2_CLOCK],
364 CONFIG_SYS_MX5_HCLK) /
365 ((pre_pdf + 1) * (pdf + 1));
368 ret_val = decode_pll(mxc_plls[PLL3_CLOCK],
369 CONFIG_SYS_MX5_HCLK) /
370 ((pre_pdf + 1) * (pdf + 1));
373 ret_val = get_lp_apm() / ((pre_pdf + 1) * (pdf + 1));
380 static u32 get_axi_a_clk(void)
382 u32 cbcdr = __raw_readl(&mxc_ccm->cbcdr);
383 u32 pdf = (cbcdr & MXC_CCM_CBCDR_AXI_A_PODF_MASK) \
384 >> MXC_CCM_CBCDR_AXI_A_PODF_OFFSET;
386 return get_periph_clk() / (pdf + 1);
389 static u32 get_axi_b_clk(void)
391 u32 cbcdr = __raw_readl(&mxc_ccm->cbcdr);
392 u32 pdf = (cbcdr & MXC_CCM_CBCDR_AXI_B_PODF_MASK) \
393 >> MXC_CCM_CBCDR_AXI_B_PODF_OFFSET;
395 return get_periph_clk() / (pdf + 1);
398 static u32 get_emi_slow_clk(void)
400 u32 cbcdr = __raw_readl(&mxc_ccm->cbcdr);
401 u32 emi_clk_sel = cbcdr & MXC_CCM_CBCDR_EMI_CLK_SEL;
402 u32 pdf = (cbcdr & MXC_CCM_CBCDR_EMI_PODF_MASK) \
403 >> MXC_CCM_CBCDR_EMI_PODF_OFFSET;
406 return get_ahb_clk() / (pdf + 1);
408 return get_periph_clk() / (pdf + 1);
411 static u32 get_ddr_clk(void)
414 u32 cbcmr = __raw_readl(&mxc_ccm->cbcmr);
415 u32 ddr_clk_sel = (cbcmr & MXC_CCM_CBCMR_DDR_CLK_SEL_MASK) \
416 >> MXC_CCM_CBCMR_DDR_CLK_SEL_OFFSET;
418 u32 cbcdr = __raw_readl(&mxc_ccm->cbcdr);
419 if (cbcdr & MXC_CCM_CBCDR_DDR_HIFREQ_SEL) {
420 u32 ddr_clk_podf = (cbcdr & MXC_CCM_CBCDR_DDR_PODF_MASK) >> \
421 MXC_CCM_CBCDR_DDR_PODF_OFFSET;
423 ret_val = decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK);
424 ret_val /= ddr_clk_podf + 1;
429 switch (ddr_clk_sel) {
431 ret_val = get_axi_a_clk();
434 ret_val = get_axi_b_clk();
437 ret_val = get_emi_slow_clk();
440 ret_val = get_ahb_clk();
450 * The API of get mxc clocks.
452 unsigned int mxc_get_clock(enum mxc_clock clk)
456 return get_mcu_main_clk();
458 return get_ahb_clk();
460 return get_ipg_clk();
462 return get_ipg_per_clk();
464 return get_uart_clk();
466 return imx_get_cspiclk();
468 return decode_pll(mxc_plls[PLL1_CLOCK],
469 CONFIG_SYS_MX5_HCLK);
471 return get_ahb_clk();
473 return get_ddr_clk();
480 u32 imx_get_uartclk(void)
482 return get_uart_clk();
486 u32 imx_get_fecclk(void)
488 return mxc_get_clock(MXC_IPG_CLK);
491 static int gcd(int m, int n)
506 * This is to calculate various parameters based on reference clock and
507 * targeted clock based on the equation:
508 * t_clk = 2*ref_freq*(mfi + mfn/(mfd+1))/(pd+1)
509 * This calculation is based on a fixed MFD value for simplicity.
511 static int calc_pll_params(u32 ref, u32 target, struct pll_param *pll)
513 u64 pd, mfi = 1, mfn, mfd, t1;
514 u32 n_target = target;
518 * Make sure targeted freq is in the valid range.
519 * Otherwise the following calculation might be wrong!!!
521 if (n_target < PLL_FREQ_MIN(ref) ||
522 n_target > PLL_FREQ_MAX(ref)) {
523 printf("Targeted peripheral clock should be"
524 "within [%d - %d]\n",
525 PLL_FREQ_MIN(ref) / SZ_DEC_1M,
526 PLL_FREQ_MAX(ref) / SZ_DEC_1M);
530 for (i = 0; i < ARRAY_SIZE(fixed_mfd); i++) {
531 if (fixed_mfd[i].ref_clk_hz == ref) {
532 mfd = fixed_mfd[i].mfd;
537 if (i == ARRAY_SIZE(fixed_mfd))
540 /* Use n_target and n_ref to avoid overflow */
541 for (pd = 1; pd <= PLL_PD_MAX; pd++) {
543 do_div(t1, (4 * n_ref));
545 if (mfi > PLL_MFI_MAX)
552 * Now got pd and mfi already
554 * mfn = (((n_target * pd) / 4 - n_ref * mfi) * mfd) / n_ref;
562 debug("ref=%d, target=%d, pd=%d," "mfi=%d,mfn=%d, mfd=%d\n",
563 ref, n_target, (u32)pd, (u32)mfi, (u32)mfn, (u32)mfd);
577 #define calc_div(tgt_clk, src_clk, limit) ({ \
579 if (((src_clk) % (tgt_clk)) <= 100) \
580 v = (src_clk) / (tgt_clk); \
582 v = ((src_clk) / (tgt_clk)) + 1;\
588 #define CHANGE_PLL_SETTINGS(pll, pd, fi, fn, fd) \
590 __raw_writel(0x1232, &pll->ctrl); \
591 __raw_writel(0x2, &pll->config); \
592 __raw_writel((((pd) - 1) << 0) | ((fi) << 4), \
594 __raw_writel(fn, &(pll->mfn)); \
595 __raw_writel((fd) - 1, &pll->mfd); \
596 __raw_writel((((pd) - 1) << 0) | ((fi) << 4), \
598 __raw_writel(fn, &pll->hfs_mfn); \
599 __raw_writel((fd) - 1, &pll->hfs_mfd); \
600 __raw_writel(0x1232, &pll->ctrl); \
601 while (!__raw_readl(&pll->ctrl) & 0x1) \
605 static int config_pll_clk(enum pll_clocks index, struct pll_param *pll_param)
607 u32 ccsr = __raw_readl(&mxc_ccm->ccsr);
608 struct mxc_pll_reg *pll = mxc_plls[index];
612 /* Switch ARM to PLL2 clock */
613 __raw_writel(ccsr | 0x4, &mxc_ccm->ccsr);
614 CHANGE_PLL_SETTINGS(pll, pll_param->pd,
615 pll_param->mfi, pll_param->mfn,
618 __raw_writel(ccsr & ~0x4, &mxc_ccm->ccsr);
621 /* Switch to pll2 bypass clock */
622 __raw_writel(ccsr | 0x2, &mxc_ccm->ccsr);
623 CHANGE_PLL_SETTINGS(pll, pll_param->pd,
624 pll_param->mfi, pll_param->mfn,
627 __raw_writel(ccsr & ~0x2, &mxc_ccm->ccsr);
630 /* Switch to pll3 bypass clock */
631 __raw_writel(ccsr | 0x1, &mxc_ccm->ccsr);
632 CHANGE_PLL_SETTINGS(pll, pll_param->pd,
633 pll_param->mfi, pll_param->mfn,
636 __raw_writel(ccsr & ~0x1, &mxc_ccm->ccsr);
639 /* Switch to pll4 bypass clock */
640 __raw_writel(ccsr | 0x20, &mxc_ccm->ccsr);
641 CHANGE_PLL_SETTINGS(pll, pll_param->pd,
642 pll_param->mfi, pll_param->mfn,
645 __raw_writel(ccsr & ~0x20, &mxc_ccm->ccsr);
654 /* Config CPU clock */
655 static int config_core_clk(u32 ref, u32 freq)
658 struct pll_param pll_param;
660 memset(&pll_param, 0, sizeof(struct pll_param));
662 /* The case that periph uses PLL1 is not considered here */
663 ret = calc_pll_params(ref, freq, &pll_param);
665 printf("Error: Can't find pll parameters for %u.%03uMHz ref %u.%03uMHz\n",
666 freq / 1000000, freq / 1000 % 1000,
667 ref / 1000000, ref / 1000 % 1000);
671 return config_pll_clk(PLL1_CLOCK, &pll_param);
674 static int config_nfc_clk(u32 nfc_clk)
677 u32 parent_rate = get_emi_slow_clk();
678 u32 div = parent_rate / nfc_clk;
684 if (parent_rate / div > NFC_CLK_MAX)
686 reg = __raw_readl(&mxc_ccm->cbcdr);
687 reg &= ~MXC_CCM_CBCDR_NFC_PODF_MASK;
688 reg |= (div - 1) << MXC_CCM_CBCDR_NFC_PODF_OFFSET;
689 __raw_writel(reg, &mxc_ccm->cbcdr);
690 while (__raw_readl(&mxc_ccm->cdhipr) != 0)
695 /* Config main_bus_clock for periphs */
696 static int config_periph_clk(u32 ref, u32 freq)
699 struct pll_param pll_param;
701 memset(&pll_param, 0, sizeof(struct pll_param));
703 if (__raw_readl(&mxc_ccm->cbcdr) & MXC_CCM_CBCDR_PERIPH_CLK_SEL) {
704 ret = calc_pll_params(ref, freq, &pll_param);
706 printf("Error: Can't find pll parameters for %u.%03uMHz ref %u.%03uMHz\n",
707 freq / 1000000, freq / 1000 % 1000,
708 ref / 1000000, ref / 1000 % 1000);
711 switch ((__raw_readl(&mxc_ccm->cbcmr) & \
712 MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK) >> \
713 MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET) {
715 return config_pll_clk(PLL1_CLOCK, &pll_param);
718 return config_pll_clk(PLL3_CLOCK, &pll_param);
728 static int config_ddr_clk(u32 emi_clk)
731 s32 shift = 0, clk_sel, div = 1;
732 u32 cbcmr = __raw_readl(&mxc_ccm->cbcmr);
733 u32 cbcdr = __raw_readl(&mxc_ccm->cbcdr);
735 if (emi_clk > MAX_DDR_CLK) {
736 printf("Warning: DDR clock should not exceed %d MHz\n",
737 MAX_DDR_CLK / SZ_DEC_1M);
738 emi_clk = MAX_DDR_CLK;
741 clk_src = get_periph_clk();
742 /* Find DDR clock input */
743 clk_sel = (cbcmr >> 10) & 0x3;
745 if (cbcdr & MXC_CCM_CBCDR_DDR_HIFREQ_SEL) {
746 clk_src = decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK);
770 if ((clk_src % emi_clk) < 10000000)
771 div = clk_src / emi_clk;
773 div = (clk_src / emi_clk) + 1;
777 cbcdr &= ~(0x7 << shift);
778 cbcdr |= div << shift;
779 __raw_writel(cbcdr, &mxc_ccm->cbcdr);
780 while (__raw_readl(&mxc_ccm->cdhipr) != 0)
782 __raw_writel(0x0, &mxc_ccm->ccdr);
788 * This function assumes the expected core clock has to be changed by
789 * modifying the PLL. This is NOT true always but for most of the times,
790 * it is. So it assumes the PLL output freq is the same as the expected
791 * core clock (presc=1) unless the core clock is less than PLL_FREQ_MIN.
792 * In the latter case, it will try to increase the presc value until
793 * (presc*core_clk) is greater than PLL_FREQ_MIN. It then makes call to
794 * calc_pll_params() and obtains the values of PD, MFI,MFN, MFD based
795 * on the targeted PLL and reference input clock to the PLL. Lastly,
796 * it sets the register based on these values along with the dividers.
797 * Note 1) There is no value checking for the passed-in divider values
798 * so the caller has to make sure those values are sensible.
799 * 2) Also adjust the NFC divider such that the NFC clock doesn't
800 * exceed NFC_CLK_MAX.
801 * 3) IPU HSP clock is independent of AHB clock. Even it can go up to
802 * 177MHz for higher voltage, this function fixes the max to 133MHz.
803 * 4) This function should not have allowed diag_printf() calls since
804 * the serial driver has been stoped. But leave then here to allow
805 * easy debugging by NOT calling the cyg_hal_plf_serial_stop().
807 int mxc_set_clock(u32 ref, u32 freq, enum mxc_clock clk)
813 if (config_core_clk(ref, freq))
817 if (config_periph_clk(ref, freq))
821 if (config_ddr_clk(freq))
825 if (config_nfc_clk(freq))
829 printf("Warning: Unsupported or invalid clock type: %d\n",
839 * The clock for the external interface can be set to use internal clock
840 * if fuse bank 4, row 3, bit 2 is set.
841 * This is an undocumented feature and it was confirmed by Freescale's support:
842 * Fuses (but not pins) may be used to configure SATA clocks.
843 * Particularly the i.MX53 Fuse_Map contains the next information
844 * about configuring SATA clocks : SATA_ALT_REF_CLK[1:0] (offset 0x180C)
845 * '00' - 100MHz (External)
846 * '01' - 50MHz (External)
847 * '10' - 120MHz, internal (USB PHY)
850 void mxc_set_sata_internal_clock(void)
852 u32 *tmp_base = (u32 *)(IIM_BASE_ADDR + 0x180c);
856 writel((readl(tmp_base) & ~0x7) | 0x4, tmp_base);
861 * Dump some core clockes.
863 int do_mx5_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
867 freq = decode_pll(mxc_plls[PLL1_CLOCK], CONFIG_SYS_MX5_HCLK);
868 printf("PLL1 %8d MHz\n", freq / 1000000);
869 freq = decode_pll(mxc_plls[PLL2_CLOCK], CONFIG_SYS_MX5_HCLK);
870 printf("PLL2 %8d MHz\n", freq / 1000000);
871 freq = decode_pll(mxc_plls[PLL3_CLOCK], CONFIG_SYS_MX5_HCLK);
872 printf("PLL3 %8d MHz\n", freq / 1000000);
874 freq = decode_pll(mxc_plls[PLL4_CLOCK], CONFIG_SYS_MX5_HCLK);
875 printf("PLL4 %8d MHz\n", freq / 1000000);
879 printf("AHB %8d kHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000);
880 printf("IPG %8d kHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000);
881 printf("IPG PERCLK %8d kHz\n", mxc_get_clock(MXC_IPG_PERCLK) / 1000);
882 printf("DDR %8d kHz\n", mxc_get_clock(MXC_DDR_CLK) / 1000);
887 /***************************************************/
890 clocks, CONFIG_SYS_MAXARGS, 1, do_mx5_showclocks,