1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2010-2019, NVIDIA CORPORATION. All rights reserved.
6 /* Tegra SoC common clock control functions */
15 #include <asm/arch/clock.h>
16 #include <asm/arch/tegra.h>
17 #include <asm/arch-tegra/ap.h>
18 #include <asm/arch-tegra/clk_rst.h>
19 #include <asm/arch-tegra/pmc.h>
20 #include <asm/arch-tegra/timer.h>
23 * This is our record of the current clock rate of each clock. We don't
24 * fill all of these in since we are only really interested in clocks which
27 static unsigned pll_rate[CLOCK_ID_COUNT];
30 * The oscillator frequency is fixed to one of four set values. Based on this
31 * the other clocks are set up appropriately.
33 static unsigned osc_freq[CLOCK_OSC_FREQ_COUNT] = {
42 /* return 1 if a peripheral ID is in range */
43 #define clock_type_id_isvalid(id) ((id) >= 0 && \
44 (id) < CLOCK_TYPE_COUNT)
46 char pllp_valid = 1; /* PLLP is set up correctly */
48 /* return 1 if a periphc_internal_id is in range */
49 #define periphc_internal_id_isvalid(id) ((id) >= 0 && \
52 /* number of clock outputs of a PLL */
53 static const u8 pll_num_clkouts[] = {
62 int clock_get_osc_bypass(void)
64 struct clk_rst_ctlr *clkrst =
65 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
68 reg = readl(&clkrst->crc_osc_ctrl);
69 return (reg & OSC_XOBP_MASK) >> OSC_XOBP_SHIFT;
72 /* Returns a pointer to the registers of the given pll */
73 static struct clk_pll *get_pll(enum clock_id clkid)
75 struct clk_rst_ctlr *clkrst =
76 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
78 assert(clock_id_is_pll(clkid));
79 if (clkid >= (enum clock_id)TEGRA_CLK_PLLS) {
80 debug("%s: Invalid PLL %d\n", __func__, clkid);
83 return &clkrst->crc_pll[clkid];
86 __weak struct clk_pll_simple *clock_get_simple_pll(enum clock_id clkid)
91 int clock_ll_read_pll(enum clock_id clkid, u32 *divm, u32 *divn,
92 u32 *divp, u32 *cpcon, u32 *lfcon)
94 struct clk_pll *pll = get_pll(clkid);
95 struct clk_pll_info *pllinfo = &tegra_pll_info_table[clkid];
98 assert(clkid != CLOCK_ID_USB);
100 /* Safety check, adds to code size but is small */
101 if (!clock_id_is_pll(clkid) || clkid == CLOCK_ID_USB)
103 data = readl(&pll->pll_base);
104 *divm = (data >> pllinfo->m_shift) & pllinfo->m_mask;
105 *divn = (data >> pllinfo->n_shift) & pllinfo->n_mask;
106 *divp = (data >> pllinfo->p_shift) & pllinfo->p_mask;
107 data = readl(&pll->pll_misc);
108 /* NOTE: On T210, cpcon/lfcon no longer exist, moved to KCP/KVCO */
109 *cpcon = (data >> pllinfo->kcp_shift) & pllinfo->kcp_mask;
110 *lfcon = (data >> pllinfo->kvco_shift) & pllinfo->kvco_mask;
115 unsigned long clock_start_pll(enum clock_id clkid, u32 divm, u32 divn,
116 u32 divp, u32 cpcon, u32 lfcon)
118 struct clk_pll *pll = NULL;
119 struct clk_pll_info *pllinfo = &tegra_pll_info_table[clkid];
120 struct clk_pll_simple *simple_pll = NULL;
123 if (clkid < (enum clock_id)TEGRA_CLK_PLLS) {
124 pll = get_pll(clkid);
126 simple_pll = clock_get_simple_pll(clkid);
128 debug("%s: Uknown simple PLL %d\n", __func__, clkid);
134 * pllinfo has the m/n/p and kcp/kvco mask and shift
135 * values for all of the PLLs used in U-Boot, with any
136 * SoC differences accounted for.
138 * Preserve EN_LOCKDET, etc.
141 misc_data = readl(&pll->pll_misc);
143 misc_data = readl(&simple_pll->pll_misc);
144 misc_data &= ~(pllinfo->kcp_mask << pllinfo->kcp_shift);
145 misc_data |= cpcon << pllinfo->kcp_shift;
146 misc_data &= ~(pllinfo->kvco_mask << pllinfo->kvco_shift);
147 misc_data |= lfcon << pllinfo->kvco_shift;
149 data = (divm << pllinfo->m_shift) | (divn << pllinfo->n_shift);
150 data |= divp << pllinfo->p_shift;
151 data |= (1 << PLL_ENABLE_SHIFT); /* BYPASS s/b 0 already */
154 writel(misc_data, &pll->pll_misc);
155 writel(data, &pll->pll_base);
157 writel(misc_data, &simple_pll->pll_misc);
158 writel(data, &simple_pll->pll_base);
161 /* calculate the stable time */
162 return timer_get_us() + CLOCK_PLL_STABLE_DELAY_US;
165 void clock_ll_set_source_divisor(enum periph_id periph_id, unsigned source,
168 u32 *reg = get_periph_source_reg(periph_id);
173 value &= ~OUT_CLK_SOURCE_31_30_MASK;
174 value |= source << OUT_CLK_SOURCE_31_30_SHIFT;
176 value &= ~OUT_CLK_DIVISOR_MASK;
177 value |= divisor << OUT_CLK_DIVISOR_SHIFT;
182 int clock_ll_set_source_bits(enum periph_id periph_id, int mux_bits,
185 u32 *reg = get_periph_source_reg(periph_id);
188 case MASK_BITS_31_30:
189 clrsetbits_le32(reg, OUT_CLK_SOURCE_31_30_MASK,
190 source << OUT_CLK_SOURCE_31_30_SHIFT);
193 case MASK_BITS_31_29:
194 clrsetbits_le32(reg, OUT_CLK_SOURCE_31_29_MASK,
195 source << OUT_CLK_SOURCE_31_29_SHIFT);
198 case MASK_BITS_31_28:
199 clrsetbits_le32(reg, OUT_CLK_SOURCE_31_28_MASK,
200 source << OUT_CLK_SOURCE_31_28_SHIFT);
210 static int clock_ll_get_source_bits(enum periph_id periph_id, int mux_bits)
212 u32 *reg = get_periph_source_reg(periph_id);
213 u32 val = readl(reg);
216 case MASK_BITS_31_30:
217 val >>= OUT_CLK_SOURCE_31_30_SHIFT;
218 val &= OUT_CLK_SOURCE_31_30_MASK;
220 case MASK_BITS_31_29:
221 val >>= OUT_CLK_SOURCE_31_29_SHIFT;
222 val &= OUT_CLK_SOURCE_31_29_MASK;
224 case MASK_BITS_31_28:
225 val >>= OUT_CLK_SOURCE_31_28_SHIFT;
226 val &= OUT_CLK_SOURCE_31_28_MASK;
233 void clock_ll_set_source(enum periph_id periph_id, unsigned source)
235 clock_ll_set_source_bits(periph_id, MASK_BITS_31_30, source);
239 * Given the parent's rate and the required rate for the children, this works
240 * out the peripheral clock divider to use, in 7.1 binary format.
242 * @param divider_bits number of divider bits (8 or 16)
243 * @param parent_rate clock rate of parent clock in Hz
244 * @param rate required clock rate for this clock
245 * @return divider which should be used
247 static int clk_get_divider(unsigned divider_bits, unsigned long parent_rate,
250 u64 divider = parent_rate * 2;
251 unsigned max_divider = 1 << divider_bits;
254 do_div(divider, rate);
256 if ((s64)divider - 2 < 0)
259 if ((s64)divider - 2 >= max_divider)
265 int clock_set_pllout(enum clock_id clkid, enum pll_out_id pllout, unsigned rate)
267 struct clk_pll *pll = get_pll(clkid);
268 int data = 0, div = 0, offset = 0;
270 if (!clock_id_is_pll(clkid))
273 if (pllout + 1 > pll_num_clkouts[clkid])
276 div = clk_get_divider(8, pll_rate[clkid], rate);
281 /* out2 and out4 are in the high part of the register */
282 if (pllout == PLL_OUT2 || pllout == PLL_OUT4)
285 data = (div << PLL_OUT_RATIO_SHIFT) |
286 PLL_OUT_OVRRIDE | PLL_OUT_CLKEN | PLL_OUT_RSTN;
287 clrsetbits_le32(&pll->pll_out[pllout >> 1],
288 PLL_OUT_RATIO_MASK << offset, data << offset);
294 * Given the parent's rate and the divider in 7.1 format, this works out the
295 * resulting peripheral clock rate.
297 * @param parent_rate clock rate of parent clock in Hz
298 * @param divider which should be used in 7.1 format
299 * @return effective clock rate of peripheral
301 static unsigned long get_rate_from_divider(unsigned long parent_rate,
306 rate = (u64)parent_rate * 2;
307 do_div(rate, divider + 2);
311 unsigned long clock_get_periph_rate(enum periph_id periph_id,
312 enum clock_id parent)
314 u32 *reg = get_periph_source_reg(periph_id);
315 unsigned parent_rate = pll_rate[parent];
316 int div = (readl(reg) & OUT_CLK_DIVISOR_MASK) >> OUT_CLK_DIVISOR_SHIFT;
319 case PERIPH_ID_UART1:
320 case PERIPH_ID_UART2:
321 case PERIPH_ID_UART3:
322 case PERIPH_ID_UART4:
323 case PERIPH_ID_UART5:
324 #ifdef CONFIG_TEGRA20
325 /* There's no divider for these clocks in this SoC. */
329 * This undoes the +2 in get_rate_from_divider() which I
330 * believe is incorrect. Ideally we would fix
331 * get_rate_from_divider(), but... Removing the +2 from
332 * get_rate_from_divider() would probably require remove the -2
333 * from the tail of clk_get_divider() since I believe that's
334 * only there to invert get_rate_from_divider()'s +2. Observe
335 * how find_best_divider() uses those two functions together.
336 * However, doing so breaks other stuff, such as Seaboard's
337 * display, likely due to clock_set_pllout()'s call to
338 * clk_get_divider(). Attempting to fix that by making
339 * clock_set_pllout() subtract 2 from clk_get_divider()'s
340 * return value doesn't help. In summary this clock driver is
341 * quite broken but I'm afraid I have no idea how to fix it
342 * without completely replacing it.
344 * Be careful to avoid a divide by zero error.
354 return get_rate_from_divider(parent_rate, div);
358 * Find the best available 7.1 format divisor given a parent clock rate and
359 * required child clock rate. This function assumes that a second-stage
360 * divisor is available which can divide by powers of 2 from 1 to 256.
362 * @param divider_bits number of divider bits (8 or 16)
363 * @param parent_rate clock rate of parent clock in Hz
364 * @param rate required clock rate for this clock
365 * @param extra_div value for the second-stage divisor (not set if this
366 * function returns -1.
367 * @return divider which should be used, or -1 if nothing is valid
370 static int find_best_divider(unsigned divider_bits, unsigned long parent_rate,
371 unsigned long rate, int *extra_div)
374 int best_divider = -1;
375 int best_error = rate;
377 /* try dividers from 1 to 256 and find closest match */
378 for (shift = 0; shift <= 8 && best_error > 0; shift++) {
379 unsigned divided_parent = parent_rate >> shift;
380 int divider = clk_get_divider(divider_bits, divided_parent,
382 unsigned effective_rate = get_rate_from_divider(divided_parent,
384 int error = rate - effective_rate;
386 /* Given a valid divider, look for the lowest error */
387 if (divider != -1 && error < best_error) {
389 *extra_div = 1 << shift;
390 best_divider = divider;
394 /* return what we found - *extra_div will already be set */
399 * Adjust peripheral PLL to use the given divider and source.
401 * @param periph_id peripheral to adjust
402 * @param source Source number (0-3 or 0-7)
403 * @param mux_bits Number of mux bits (2 or 4)
404 * @param divider Required divider in 7.1 or 15.1 format
405 * @return 0 if ok, -1 on error (requesting a parent clock which is not valid
406 * for this peripheral)
408 static int adjust_periph_pll(enum periph_id periph_id, int source,
409 int mux_bits, unsigned divider)
411 u32 *reg = get_periph_source_reg(periph_id);
413 clrsetbits_le32(reg, OUT_CLK_DIVISOR_MASK,
414 divider << OUT_CLK_DIVISOR_SHIFT);
417 /* work out the source clock and set it */
421 clock_ll_set_source_bits(periph_id, mux_bits, source);
427 enum clock_id clock_get_periph_parent(enum periph_id periph_id)
429 int err, mux_bits, divider_bits, type;
432 err = get_periph_clock_info(periph_id, &mux_bits, ÷r_bits, &type);
434 return CLOCK_ID_NONE;
436 source = clock_ll_get_source_bits(periph_id, mux_bits);
438 return get_periph_clock_id(periph_id, source);
441 unsigned clock_adjust_periph_pll_div(enum periph_id periph_id,
442 enum clock_id parent, unsigned rate, int *extra_div)
444 unsigned effective_rate;
445 int mux_bits, divider_bits, source;
449 /* work out the source clock and set it */
450 source = get_periph_clock_source(periph_id, parent, &mux_bits,
453 divider = find_best_divider(divider_bits, pll_rate[parent],
458 assert(divider >= 0);
459 if (adjust_periph_pll(periph_id, source, mux_bits, divider))
461 debug("periph %d, rate=%d, reg=%p = %x\n", periph_id, rate,
462 get_periph_source_reg(periph_id),
463 readl(get_periph_source_reg(periph_id)));
465 /* Check what we ended up with. This shouldn't matter though */
466 effective_rate = clock_get_periph_rate(periph_id, parent);
468 effective_rate /= *extra_div;
469 if (rate != effective_rate)
470 debug("Requested clock rate %u not honored (got %u)\n",
471 rate, effective_rate);
472 return effective_rate;
475 unsigned clock_start_periph_pll(enum periph_id periph_id,
476 enum clock_id parent, unsigned rate)
478 unsigned effective_rate;
480 reset_set_enable(periph_id, 1);
481 clock_enable(periph_id);
484 effective_rate = clock_adjust_periph_pll_div(periph_id, parent, rate,
487 reset_set_enable(periph_id, 0);
488 return effective_rate;
491 void clock_enable(enum periph_id clkid)
493 clock_set_enable(clkid, 1);
496 void clock_disable(enum periph_id clkid)
498 clock_set_enable(clkid, 0);
501 void reset_periph(enum periph_id periph_id, int us_delay)
503 /* Put peripheral into reset */
504 reset_set_enable(periph_id, 1);
508 reset_set_enable(periph_id, 0);
513 void reset_cmplx_set_enable(int cpu, int which, int reset)
515 struct clk_rst_ctlr *clkrst =
516 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
519 /* Form the mask, which depends on the cpu chosen (2 or 4) */
520 assert(cpu >= 0 && cpu < MAX_NUM_CPU);
523 /* either enable or disable those reset for that CPU */
525 writel(mask, &clkrst->crc_cpu_cmplx_set);
527 writel(mask, &clkrst->crc_cpu_cmplx_clr);
530 unsigned int __weak clk_m_get_rate(unsigned int parent_rate)
535 unsigned clock_get_rate(enum clock_id clkid)
539 u64 parent_rate, rate;
540 struct clk_pll_info *pllinfo = &tegra_pll_info_table[clkid];
542 parent_rate = osc_freq[clock_get_osc_freq()];
543 if (clkid == CLOCK_ID_OSC)
546 if (clkid == CLOCK_ID_CLK_M)
547 return clk_m_get_rate(parent_rate);
549 pll = get_pll(clkid);
552 base = readl(&pll->pll_base);
554 rate = parent_rate * ((base >> pllinfo->n_shift) & pllinfo->n_mask);
555 divm = (base >> pllinfo->m_shift) & pllinfo->m_mask;
557 * PLLU uses p_mask/p_shift for VCO on all but T210,
558 * T210 uses normal DIVP. Handled in pllinfo table.
560 #ifdef CONFIG_TEGRA210
562 * PLLP's primary output (pllP_out0) on T210 is the VCO, and divp is
563 * not applied. pllP_out2 does have divp applied. All other pllP_outN
564 * are divided down from pllP_out0. We only support pllP_out0 in
565 * U-Boot at the time of writing this comment.
567 if (clkid != CLOCK_ID_PERIPH)
569 divm <<= (base >> pllinfo->p_shift) & pllinfo->p_mask;
575 * Set the output frequency you want for each PLL clock.
576 * PLL output frequencies are programmed by setting their N, M and P values.
577 * The governing equations are:
578 * VCO = (Fi / m) * n, Fo = VCO / (2^p)
579 * where Fo is the output frequency from the PLL.
580 * Example: Set the output frequency to 216Mhz(Fo) with 12Mhz OSC(Fi)
581 * 216Mhz = ((12Mhz / m) * n) / (2^p) so n=432,m=12,p=1
582 * Please see Tegra TRM section 5.3 to get the detail for PLL Programming
584 * @param n PLL feedback divider(DIVN)
585 * @param m PLL input divider(DIVN)
586 * @param p post divider(DIVP)
587 * @param cpcon base PLL charge pump(CPCON)
588 * @return 0 if ok, -1 on error (the requested PLL is incorrect and cannot
589 * be overridden), 1 if PLL is already correct
591 int clock_set_rate(enum clock_id clkid, u32 n, u32 m, u32 p, u32 cpcon)
593 u32 base_reg, misc_reg;
595 struct clk_pll_info *pllinfo = &tegra_pll_info_table[clkid];
597 pll = get_pll(clkid);
599 base_reg = readl(&pll->pll_base);
601 /* Set BYPASS, m, n and p to PLL_BASE */
602 base_reg &= ~(pllinfo->m_mask << pllinfo->m_shift);
603 base_reg |= m << pllinfo->m_shift;
605 base_reg &= ~(pllinfo->n_mask << pllinfo->n_shift);
606 base_reg |= n << pllinfo->n_shift;
608 base_reg &= ~(pllinfo->p_mask << pllinfo->p_shift);
609 base_reg |= p << pllinfo->p_shift;
611 if (clkid == CLOCK_ID_PERIPH) {
613 * If the PLL is already set up, check that it is correct
614 * and record this info for clock_verify() to check.
616 if (base_reg & PLL_BASE_OVRRIDE_MASK) {
617 base_reg |= PLL_ENABLE_MASK;
618 if (base_reg != readl(&pll->pll_base))
620 return pllp_valid ? 1 : -1;
622 base_reg |= PLL_BASE_OVRRIDE_MASK;
625 base_reg |= PLL_BYPASS_MASK;
626 writel(base_reg, &pll->pll_base);
628 /* Set cpcon (KCP) to PLL_MISC */
629 misc_reg = readl(&pll->pll_misc);
630 misc_reg &= ~(pllinfo->kcp_mask << pllinfo->kcp_shift);
631 misc_reg |= cpcon << pllinfo->kcp_shift;
632 writel(misc_reg, &pll->pll_misc);
635 base_reg |= PLL_ENABLE_MASK;
636 writel(base_reg, &pll->pll_base);
639 base_reg &= ~PLL_BYPASS_MASK;
640 writel(base_reg, &pll->pll_base);
645 void clock_ll_start_uart(enum periph_id periph_id)
647 /* Assert UART reset and enable clock */
648 reset_set_enable(periph_id, 1);
649 clock_enable(periph_id);
650 clock_ll_set_source(periph_id, 0); /* UARTx_CLK_SRC = 00, PLLP_OUT0 */
655 /* De-assert reset to UART */
656 reset_set_enable(periph_id, 0);
659 #if CONFIG_IS_ENABLED(OF_CONTROL)
660 int clock_decode_periph_id(struct udevice *dev)
666 err = dev_read_u32_array(dev, "clocks", cell, ARRAY_SIZE(cell));
669 id = clk_id_to_periph_id(cell[1]);
670 assert(clock_periph_id_isvalid(id));
673 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
675 int clock_verify(void)
677 struct clk_pll *pll = get_pll(CLOCK_ID_PERIPH);
678 u32 reg = readl(&pll->pll_base);
681 printf("Warning: PLLP %x is not correct\n", reg);
684 debug("PLLP %x is correct\n", reg);
688 void clock_init(void)
692 pll_rate[CLOCK_ID_CGENERAL] = clock_get_rate(CLOCK_ID_CGENERAL);
693 pll_rate[CLOCK_ID_MEMORY] = clock_get_rate(CLOCK_ID_MEMORY);
694 pll_rate[CLOCK_ID_PERIPH] = clock_get_rate(CLOCK_ID_PERIPH);
695 pll_rate[CLOCK_ID_USB] = clock_get_rate(CLOCK_ID_USB);
696 pll_rate[CLOCK_ID_DISPLAY] = clock_get_rate(CLOCK_ID_DISPLAY);
697 pll_rate[CLOCK_ID_XCPU] = clock_get_rate(CLOCK_ID_XCPU);
698 pll_rate[CLOCK_ID_SFROM32KHZ] = 32768;
699 pll_rate[CLOCK_ID_OSC] = clock_get_rate(CLOCK_ID_OSC);
700 pll_rate[CLOCK_ID_CLK_M] = clock_get_rate(CLOCK_ID_CLK_M);
702 debug("Osc = %d\n", pll_rate[CLOCK_ID_OSC]);
703 debug("CLKM = %d\n", pll_rate[CLOCK_ID_CLK_M]);
704 debug("PLLC = %d\n", pll_rate[CLOCK_ID_CGENERAL]);
705 debug("PLLM = %d\n", pll_rate[CLOCK_ID_MEMORY]);
706 debug("PLLP = %d\n", pll_rate[CLOCK_ID_PERIPH]);
707 debug("PLLU = %d\n", pll_rate[CLOCK_ID_USB]);
708 debug("PLLD = %d\n", pll_rate[CLOCK_ID_DISPLAY]);
709 debug("PLLX = %d\n", pll_rate[CLOCK_ID_XCPU]);
711 for (i = 0; periph_clk_init_table[i].periph_id != -1; i++) {
712 enum periph_id periph_id;
713 enum clock_id parent;
714 int source, mux_bits, divider_bits;
716 periph_id = periph_clk_init_table[i].periph_id;
717 parent = periph_clk_init_table[i].parent_clock_id;
719 source = get_periph_clock_source(periph_id, parent, &mux_bits,
721 clock_ll_set_source_bits(periph_id, mux_bits, source);
725 static void set_avp_clock_source(u32 src)
727 struct clk_rst_ctlr *clkrst =
728 (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
731 val = (src << SCLK_SWAKEUP_FIQ_SOURCE_SHIFT) |
732 (src << SCLK_SWAKEUP_IRQ_SOURCE_SHIFT) |
733 (src << SCLK_SWAKEUP_RUN_SOURCE_SHIFT) |
734 (src << SCLK_SWAKEUP_IDLE_SOURCE_SHIFT) |
735 (SCLK_SYS_STATE_RUN << SCLK_SYS_STATE_SHIFT);
736 writel(val, &clkrst->crc_sclk_brst_pol);
741 * This function is useful on Tegra30, and any later SoCs that have compatible
742 * PLLP configuration registers.
743 * NOTE: Not used on Tegra210 - see tegra210_setup_pllp in T210 clock.c
745 void tegra30_set_up_pllp(void)
747 struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
751 * Based on the Tegra TRM, the system clock (which is the AVP clock) can
752 * run up to 275MHz. On power on, the default sytem clock source is set
753 * to PLLP_OUT0. This function sets PLLP's (hence PLLP_OUT0's) rate to
754 * 408MHz which is beyond system clock's upper limit.
756 * The fix is to set the system clock to CLK_M before initializing PLLP,
757 * and then switch back to PLLP_OUT4, which has an appropriate divider
758 * configured, after PLLP has been configured
760 set_avp_clock_source(SCLK_SOURCE_CLKM);
763 * PLLP output frequency set to 408Mhz
764 * PLLC output frequency set to 228Mhz
766 switch (clock_get_osc_freq()) {
767 case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
768 clock_set_rate(CLOCK_ID_PERIPH, 408, 12, 0, 8);
769 clock_set_rate(CLOCK_ID_CGENERAL, 456, 12, 1, 8);
772 case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
773 clock_set_rate(CLOCK_ID_PERIPH, 408, 26, 0, 8);
774 clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8);
777 case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */
778 clock_set_rate(CLOCK_ID_PERIPH, 408, 13, 0, 8);
779 clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8);
781 case CLOCK_OSC_FREQ_19_2:
784 * These are not supported. It is too early to print a
785 * message and the UART likely won't work anyway due to the
786 * oscillator being wrong.
791 /* Set PLLP_OUT1, 2, 3 & 4 freqs to 9.6, 48, 102 & 204MHz */
794 /* Assert RSTN before enable */
795 reg = PLLP_OUT2_RSTN_EN | PLLP_OUT1_RSTN_EN;
796 writel(reg, &clkrst->crc_pll[CLOCK_ID_PERIPH].pll_out[0]);
797 /* Set divisor and reenable */
798 reg = (IN_408_OUT_48_DIVISOR << PLLP_OUT2_RATIO)
799 | PLLP_OUT2_OVR | PLLP_OUT2_CLKEN | PLLP_OUT2_RSTN_DIS
800 | (IN_408_OUT_9_6_DIVISOR << PLLP_OUT1_RATIO)
801 | PLLP_OUT1_OVR | PLLP_OUT1_CLKEN | PLLP_OUT1_RSTN_DIS;
802 writel(reg, &clkrst->crc_pll[CLOCK_ID_PERIPH].pll_out[0]);
805 /* Assert RSTN before enable */
806 reg = PLLP_OUT4_RSTN_EN | PLLP_OUT3_RSTN_EN;
807 writel(reg, &clkrst->crc_pll[CLOCK_ID_PERIPH].pll_out[1]);
808 /* Set divisor and reenable */
809 reg = (IN_408_OUT_204_DIVISOR << PLLP_OUT4_RATIO)
810 | PLLP_OUT4_OVR | PLLP_OUT4_CLKEN | PLLP_OUT4_RSTN_DIS
811 | (IN_408_OUT_102_DIVISOR << PLLP_OUT3_RATIO)
812 | PLLP_OUT3_OVR | PLLP_OUT3_CLKEN | PLLP_OUT3_RSTN_DIS;
813 writel(reg, &clkrst->crc_pll[CLOCK_ID_PERIPH].pll_out[1]);
815 set_avp_clock_source(SCLK_SOURCE_PLLP_OUT4);
818 int clock_external_output(int clk_id)
822 if (clk_id >= 1 && clk_id <= 3) {
823 val = tegra_pmc_readl(offsetof(struct pmc_ctlr,
825 val |= 1 << (2 + (clk_id - 1) * 8);
826 tegra_pmc_writel(val,
827 offsetof(struct pmc_ctlr,
831 printf("%s: Unknown output clock id %d\n", __func__, clk_id);
838 __weak bool clock_early_init_done(void)