1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
4 * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
8 #include <clk-uclass.h>
10 #include <stm32_rcc.h>
13 #include <asm/arch/stm32.h>
14 #include <asm/arch/stm32_pwr.h>
16 #include <dt-bindings/mfd/stm32f7-rcc.h>
18 #define RCC_CR_HSION BIT(0)
19 #define RCC_CR_HSEON BIT(16)
20 #define RCC_CR_HSERDY BIT(17)
21 #define RCC_CR_HSEBYP BIT(18)
22 #define RCC_CR_CSSON BIT(19)
23 #define RCC_CR_PLLON BIT(24)
24 #define RCC_CR_PLLRDY BIT(25)
25 #define RCC_CR_PLLSAION BIT(28)
26 #define RCC_CR_PLLSAIRDY BIT(29)
28 #define RCC_PLLCFGR_PLLM_MASK GENMASK(5, 0)
29 #define RCC_PLLCFGR_PLLN_MASK GENMASK(14, 6)
30 #define RCC_PLLCFGR_PLLP_MASK GENMASK(17, 16)
31 #define RCC_PLLCFGR_PLLQ_MASK GENMASK(27, 24)
32 #define RCC_PLLCFGR_PLLSRC BIT(22)
33 #define RCC_PLLCFGR_PLLM_SHIFT 0
34 #define RCC_PLLCFGR_PLLN_SHIFT 6
35 #define RCC_PLLCFGR_PLLP_SHIFT 16
36 #define RCC_PLLCFGR_PLLQ_SHIFT 24
38 #define RCC_CFGR_AHB_PSC_MASK GENMASK(7, 4)
39 #define RCC_CFGR_APB1_PSC_MASK GENMASK(12, 10)
40 #define RCC_CFGR_APB2_PSC_MASK GENMASK(15, 13)
41 #define RCC_CFGR_SW0 BIT(0)
42 #define RCC_CFGR_SW1 BIT(1)
43 #define RCC_CFGR_SW_MASK GENMASK(1, 0)
44 #define RCC_CFGR_SW_HSI 0
45 #define RCC_CFGR_SW_HSE RCC_CFGR_SW0
46 #define RCC_CFGR_SW_PLL RCC_CFGR_SW1
47 #define RCC_CFGR_SWS0 BIT(2)
48 #define RCC_CFGR_SWS1 BIT(3)
49 #define RCC_CFGR_SWS_MASK GENMASK(3, 2)
50 #define RCC_CFGR_SWS_HSI 0
51 #define RCC_CFGR_SWS_HSE RCC_CFGR_SWS0
52 #define RCC_CFGR_SWS_PLL RCC_CFGR_SWS1
53 #define RCC_CFGR_HPRE_SHIFT 4
54 #define RCC_CFGR_PPRE1_SHIFT 10
55 #define RCC_CFGR_PPRE2_SHIFT 13
57 #define RCC_PLLSAICFGR_PLLSAIN_MASK GENMASK(14, 6)
58 #define RCC_PLLSAICFGR_PLLSAIP_MASK GENMASK(17, 16)
59 #define RCC_PLLSAICFGR_PLLSAIQ_MASK GENMASK(27, 24)
60 #define RCC_PLLSAICFGR_PLLSAIR_MASK GENMASK(30, 28)
61 #define RCC_PLLSAICFGR_PLLSAIN_SHIFT 6
62 #define RCC_PLLSAICFGR_PLLSAIP_SHIFT 16
63 #define RCC_PLLSAICFGR_PLLSAIQ_SHIFT 24
64 #define RCC_PLLSAICFGR_PLLSAIR_SHIFT 28
65 #define RCC_PLLSAICFGR_PLLSAIP_4 BIT(16)
66 #define RCC_PLLSAICFGR_PLLSAIQ_4 BIT(26)
67 #define RCC_PLLSAICFGR_PLLSAIR_3 BIT(29) | BIT(28)
69 #define RCC_DCKCFGRX_TIMPRE BIT(24)
70 #define RCC_DCKCFGRX_CK48MSEL BIT(27)
71 #define RCC_DCKCFGRX_SDMMC1SEL BIT(28)
72 #define RCC_DCKCFGR2_SDMMC2SEL BIT(29)
74 #define RCC_DCKCFGR_PLLSAIDIVR_SHIFT 16
75 #define RCC_DCKCFGR_PLLSAIDIVR_MASK GENMASK(17, 16)
76 #define RCC_DCKCFGR_PLLSAIDIVR_2 0
79 * RCC AHB1ENR specific definitions
81 #define RCC_AHB1ENR_ETHMAC_EN BIT(25)
82 #define RCC_AHB1ENR_ETHMAC_TX_EN BIT(26)
83 #define RCC_AHB1ENR_ETHMAC_RX_EN BIT(27)
86 * RCC APB1ENR specific definitions
88 #define RCC_APB1ENR_TIM2EN BIT(0)
89 #define RCC_APB1ENR_PWREN BIT(28)
92 * RCC APB2ENR specific definitions
94 #define RCC_APB2ENR_SYSCFGEN BIT(14)
95 #define RCC_APB2ENR_SAI1EN BIT(22)
103 static const struct stm32_clk_info stm32f4_clk_info = {
109 .ahb_psc = AHB_PSC_1,
110 .apb1_psc = APB_PSC_4,
111 .apb2_psc = APB_PSC_2,
113 .has_overdrive = false,
117 static const struct stm32_clk_info stm32f7_clk_info = {
123 .ahb_psc = AHB_PSC_1,
124 .apb1_psc = APB_PSC_4,
125 .apb2_psc = APB_PSC_2,
127 .has_overdrive = true,
132 struct stm32_rcc_regs *base;
133 struct stm32_pwr_regs *pwr_regs;
134 struct stm32_clk_info info;
135 unsigned long hse_rate;
138 #ifdef CONFIG_VIDEO_STM32
139 static const u8 plldivr_table[] = { 0, 0, 2, 3, 4, 5, 6, 7 };
141 static const u8 pllsaidivr_table[] = { 2, 4, 8, 16 };
143 static int configure_clocks(struct udevice *dev)
145 struct stm32_clk *priv = dev_get_priv(dev);
146 struct stm32_rcc_regs *regs = priv->base;
147 struct stm32_pwr_regs *pwr = priv->pwr_regs;
148 struct pll_psc *sys_pll_psc = &priv->info.sys_pll_psc;
150 /* Reset RCC configuration */
151 setbits_le32(®s->cr, RCC_CR_HSION);
152 writel(0, ®s->cfgr); /* Reset CFGR */
153 clrbits_le32(®s->cr, (RCC_CR_HSEON | RCC_CR_CSSON
154 | RCC_CR_PLLON | RCC_CR_PLLSAION));
155 writel(0x24003010, ®s->pllcfgr); /* Reset value from RM */
156 clrbits_le32(®s->cr, RCC_CR_HSEBYP);
157 writel(0, ®s->cir); /* Disable all interrupts */
159 /* Configure for HSE+PLL operation */
160 setbits_le32(®s->cr, RCC_CR_HSEON);
161 while (!(readl(®s->cr) & RCC_CR_HSERDY))
164 setbits_le32(®s->cfgr, ((
165 sys_pll_psc->ahb_psc << RCC_CFGR_HPRE_SHIFT)
166 | (sys_pll_psc->apb1_psc << RCC_CFGR_PPRE1_SHIFT)
167 | (sys_pll_psc->apb2_psc << RCC_CFGR_PPRE2_SHIFT)));
169 /* Configure the main PLL */
170 setbits_le32(®s->pllcfgr, RCC_PLLCFGR_PLLSRC); /* pll source HSE */
171 clrsetbits_le32(®s->pllcfgr, RCC_PLLCFGR_PLLM_MASK,
172 sys_pll_psc->pll_m << RCC_PLLCFGR_PLLM_SHIFT);
173 clrsetbits_le32(®s->pllcfgr, RCC_PLLCFGR_PLLN_MASK,
174 sys_pll_psc->pll_n << RCC_PLLCFGR_PLLN_SHIFT);
175 clrsetbits_le32(®s->pllcfgr, RCC_PLLCFGR_PLLP_MASK,
176 ((sys_pll_psc->pll_p >> 1) - 1) << RCC_PLLCFGR_PLLP_SHIFT);
177 clrsetbits_le32(®s->pllcfgr, RCC_PLLCFGR_PLLQ_MASK,
178 sys_pll_psc->pll_q << RCC_PLLCFGR_PLLQ_SHIFT);
180 /* configure SDMMC clock */
181 if (priv->info.v2) { /*stm32f7 case */
182 /* select PLLQ as 48MHz clock source */
183 clrbits_le32(®s->dckcfgr2, RCC_DCKCFGRX_CK48MSEL);
185 /* select 48MHz as SDMMC1 clock source */
186 clrbits_le32(®s->dckcfgr2, RCC_DCKCFGRX_SDMMC1SEL);
188 /* select 48MHz as SDMMC2 clock source */
189 clrbits_le32(®s->dckcfgr2, RCC_DCKCFGR2_SDMMC2SEL);
190 } else { /* stm32f4 case */
191 /* select PLLQ as 48MHz clock source */
192 clrbits_le32(®s->dckcfgr, RCC_DCKCFGRX_CK48MSEL);
194 /* select 48MHz as SDMMC1 clock source */
195 clrbits_le32(®s->dckcfgr, RCC_DCKCFGRX_SDMMC1SEL);
198 #ifdef CONFIG_VIDEO_STM32
200 * Configure the SAI PLL to generate LTDC pixel clock
202 clrsetbits_le32(®s->pllsaicfgr, RCC_PLLSAICFGR_PLLSAIR_MASK,
203 RCC_PLLSAICFGR_PLLSAIR_3);
204 clrsetbits_le32(®s->pllsaicfgr, RCC_PLLSAICFGR_PLLSAIN_MASK,
205 195 << RCC_PLLSAICFGR_PLLSAIN_SHIFT);
207 clrsetbits_le32(®s->dckcfgr, RCC_DCKCFGR_PLLSAIDIVR_MASK,
208 RCC_DCKCFGR_PLLSAIDIVR_2 << RCC_DCKCFGR_PLLSAIDIVR_SHIFT);
210 /* Enable the main PLL */
211 setbits_le32(®s->cr, RCC_CR_PLLON);
212 while (!(readl(®s->cr) & RCC_CR_PLLRDY))
215 #ifdef CONFIG_VIDEO_STM32
216 /* Enable the SAI PLL */
217 setbits_le32(®s->cr, RCC_CR_PLLSAION);
218 while (!(readl(®s->cr) & RCC_CR_PLLSAIRDY))
221 setbits_le32(®s->apb1enr, RCC_APB1ENR_PWREN);
223 if (priv->info.has_overdrive) {
225 * Enable high performance mode
226 * System frequency up to 200 MHz
228 setbits_le32(&pwr->cr1, PWR_CR1_ODEN);
230 while (!(readl(&pwr->csr1) & PWR_CSR1_ODRDY))
232 /* Enable the Over-drive switch */
233 setbits_le32(&pwr->cr1, PWR_CR1_ODSWEN);
235 while (!(readl(&pwr->csr1) & PWR_CSR1_ODSWRDY))
239 stm32_flash_latency_cfg(5);
240 clrbits_le32(®s->cfgr, (RCC_CFGR_SW0 | RCC_CFGR_SW1));
241 setbits_le32(®s->cfgr, RCC_CFGR_SW_PLL);
243 while ((readl(®s->cfgr) & RCC_CFGR_SWS_MASK) !=
247 #ifdef CONFIG_ETH_DESIGNWARE
248 /* gate the SYSCFG clock, needed to set RMII ethernet interface */
249 setbits_le32(®s->apb2enr, RCC_APB2ENR_SYSCFGEN);
255 static bool stm32_clk_get_ck48msel(struct stm32_clk *priv)
257 struct stm32_rcc_regs *regs = priv->base;
259 if (priv->info.v2) /*stm32f7 case */
260 return readl(®s->dckcfgr2) & RCC_DCKCFGRX_CK48MSEL;
263 return readl(®s->dckcfgr) & RCC_DCKCFGRX_CK48MSEL;
266 static unsigned long stm32_clk_get_pllsai_vco_rate(struct stm32_clk *priv)
268 struct stm32_rcc_regs *regs = priv->base;
271 pllm = (readl(®s->pllcfgr) & RCC_PLLCFGR_PLLM_MASK);
272 pllsain = ((readl(®s->pllsaicfgr) & RCC_PLLSAICFGR_PLLSAIN_MASK)
273 >> RCC_PLLSAICFGR_PLLSAIN_SHIFT);
275 return ((priv->hse_rate / pllm) * pllsain);
278 static unsigned long stm32_clk_get_pllsai_rate(struct stm32_clk *priv,
279 enum pllsai_div output)
281 struct stm32_rcc_regs *regs = priv->base;
286 pll_div_output = ((((readl(®s->pllsaicfgr)
287 & RCC_PLLSAICFGR_PLLSAIP_MASK)
288 >> RCC_PLLSAICFGR_PLLSAIP_SHIFT) + 1) << 1);
291 pll_div_output = (readl(®s->pllsaicfgr)
292 & RCC_PLLSAICFGR_PLLSAIQ_MASK)
293 >> RCC_PLLSAICFGR_PLLSAIQ_SHIFT;
296 pll_div_output = (readl(®s->pllsaicfgr)
297 & RCC_PLLSAICFGR_PLLSAIR_MASK)
298 >> RCC_PLLSAICFGR_PLLSAIR_SHIFT;
301 pr_err("incorrect PLLSAI output %d\n", output);
305 return (stm32_clk_get_pllsai_vco_rate(priv) / pll_div_output);
308 static bool stm32_get_timpre(struct stm32_clk *priv)
310 struct stm32_rcc_regs *regs = priv->base;
313 if (priv->info.v2) /*stm32f7 case */
314 val = readl(®s->dckcfgr2);
316 val = readl(®s->dckcfgr);
317 /* get timer prescaler */
318 return !!(val & RCC_DCKCFGRX_TIMPRE);
321 static u32 stm32_get_hclk_rate(struct stm32_rcc_regs *regs, u32 sysclk)
324 /* Prescaler table lookups for clock computation */
325 u8 ahb_psc_table[16] = {
326 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9
329 shift = ahb_psc_table[(
330 (readl(®s->cfgr) & RCC_CFGR_AHB_PSC_MASK)
331 >> RCC_CFGR_HPRE_SHIFT)];
333 return sysclk >> shift;
336 static u8 stm32_get_apb_shift(struct stm32_rcc_regs *regs, enum apb apb)
338 /* Prescaler table lookups for clock computation */
339 u8 apb_psc_table[8] = {
340 0, 0, 0, 0, 1, 2, 3, 4
344 return apb_psc_table[(
345 (readl(®s->cfgr) & RCC_CFGR_APB1_PSC_MASK)
346 >> RCC_CFGR_PPRE1_SHIFT)];
348 return apb_psc_table[(
349 (readl(®s->cfgr) & RCC_CFGR_APB2_PSC_MASK)
350 >> RCC_CFGR_PPRE2_SHIFT)];
353 static u32 stm32_get_timer_rate(struct stm32_clk *priv, u32 sysclk,
356 struct stm32_rcc_regs *regs = priv->base;
357 u8 shift = stm32_get_apb_shift(regs, apb);
359 if (stm32_get_timpre(priv))
361 * if APB prescaler is configured to a
362 * division factor of 1, 2 or 4
368 return stm32_get_hclk_rate(regs, sysclk);
370 return (sysclk >> shift) * 4;
374 * if APB prescaler is configured to a
375 * division factor of 1
380 return (sysclk >> shift) * 2;
383 static ulong stm32_clk_get_rate(struct clk *clk)
385 struct stm32_clk *priv = dev_get_priv(clk->dev);
386 struct stm32_rcc_regs *regs = priv->base;
392 u16 pllm, plln, pllp, pllq;
394 if ((readl(®s->cfgr) & RCC_CFGR_SWS_MASK) ==
396 pllm = (readl(®s->pllcfgr) & RCC_PLLCFGR_PLLM_MASK);
397 plln = ((readl(®s->pllcfgr) & RCC_PLLCFGR_PLLN_MASK)
398 >> RCC_PLLCFGR_PLLN_SHIFT);
399 pllp = ((((readl(®s->pllcfgr) & RCC_PLLCFGR_PLLP_MASK)
400 >> RCC_PLLCFGR_PLLP_SHIFT) + 1) << 1);
401 pllq = ((readl(®s->pllcfgr) & RCC_PLLCFGR_PLLQ_MASK)
402 >> RCC_PLLCFGR_PLLQ_SHIFT);
403 vco = (priv->hse_rate / pllm) * plln;
411 * AHB CLOCK: 3 x 32 bits consecutive registers are used :
412 * AHB1, AHB2 and AHB3
414 case STM32F7_AHB1_CLOCK(GPIOA) ... STM32F7_AHB3_CLOCK(QSPI):
415 return stm32_get_hclk_rate(regs, sysclk);
417 case STM32F7_APB1_CLOCK(TIM2) ... STM32F7_APB1_CLOCK(UART8):
418 /* For timer clock, an additionnal prescaler is used*/
420 case STM32F7_APB1_CLOCK(TIM2):
421 case STM32F7_APB1_CLOCK(TIM3):
422 case STM32F7_APB1_CLOCK(TIM4):
423 case STM32F7_APB1_CLOCK(TIM5):
424 case STM32F7_APB1_CLOCK(TIM6):
425 case STM32F7_APB1_CLOCK(TIM7):
426 case STM32F7_APB1_CLOCK(TIM12):
427 case STM32F7_APB1_CLOCK(TIM13):
428 case STM32F7_APB1_CLOCK(TIM14):
429 return stm32_get_timer_rate(priv, sysclk, APB1);
431 return (sysclk >> stm32_get_apb_shift(regs, APB1));
434 case STM32F7_APB2_CLOCK(TIM1) ... STM32F7_APB2_CLOCK(DSI):
437 * particular case for SDMMC1 and SDMMC2 :
438 * 48Mhz source clock can be from main PLL or from
441 case STM32F7_APB2_CLOCK(SDMMC1):
442 case STM32F7_APB2_CLOCK(SDMMC2):
443 if (clk->id == STM32F7_APB2_CLOCK(SDMMC1))
444 sdmmcxsel_bit = RCC_DCKCFGRX_SDMMC1SEL;
446 sdmmcxsel_bit = RCC_DCKCFGR2_SDMMC2SEL;
448 if (readl(®s->dckcfgr2) & sdmmcxsel_bit)
449 /* System clock is selected as SDMMC1 clock */
452 * 48 MHz can be generated by either PLLSAIP
453 * or by PLLQ depending of CK48MSEL bit of RCC_DCKCFGR
455 if (stm32_clk_get_ck48msel(priv))
456 return stm32_clk_get_pllsai_rate(priv, PLLSAIP);
461 /* For timer clock, an additionnal prescaler is used*/
462 case STM32F7_APB2_CLOCK(TIM1):
463 case STM32F7_APB2_CLOCK(TIM8):
464 case STM32F7_APB2_CLOCK(TIM9):
465 case STM32F7_APB2_CLOCK(TIM10):
466 case STM32F7_APB2_CLOCK(TIM11):
467 return stm32_get_timer_rate(priv, sysclk, APB2);
470 /* particular case for LTDC clock */
471 case STM32F7_APB2_CLOCK(LTDC):
472 saidivr = readl(®s->dckcfgr);
473 saidivr = (saidivr & RCC_DCKCFGR_PLLSAIDIVR_MASK)
474 >> RCC_DCKCFGR_PLLSAIDIVR_SHIFT;
475 pllsai_rate = stm32_clk_get_pllsai_rate(priv, PLLSAIR);
477 return pllsai_rate / pllsaidivr_table[saidivr];
479 return (sysclk >> stm32_get_apb_shift(regs, APB2));
482 pr_err("clock index %ld out of range\n", clk->id);
487 static ulong stm32_set_rate(struct clk *clk, ulong rate)
489 #ifdef CONFIG_VIDEO_STM32
490 struct stm32_clk *priv = dev_get_priv(clk->dev);
491 struct stm32_rcc_regs *regs = priv->base;
492 u32 pllsair_rate, pllsai_vco_rate, current_rate;
493 u32 best_div, best_diff, diff;
495 u8 best_plldivr, best_pllsaidivr;
499 /* Only set_rate for LTDC clock is implemented */
500 if (clk->id != STM32F7_APB2_CLOCK(LTDC)) {
501 pr_err("set_rate not implemented for clock index %ld\n",
506 if (rate == stm32_clk_get_rate(clk))
507 /* already set to requested rate */
510 /* get the current PLLSAIR output freq */
511 pllsair_rate = stm32_clk_get_pllsai_rate(priv, PLLSAIR);
512 best_div = pllsair_rate / rate;
514 /* look into pllsaidivr_table if this divider is available*/
515 for (i = 0 ; i < sizeof(pllsaidivr_table); i++)
516 if (best_div == pllsaidivr_table[i]) {
517 /* set pll_saidivr with found value */
518 clrsetbits_le32(®s->dckcfgr,
519 RCC_DCKCFGR_PLLSAIDIVR_MASK,
520 pllsaidivr_table[i]);
525 * As no pllsaidivr value is suitable to obtain requested freq,
526 * test all combination of pllsaidivr * pllsair and find the one
527 * which give freq closest to requested rate.
530 pllsai_vco_rate = stm32_clk_get_pllsai_vco_rate(priv);
531 best_diff = ULONG_MAX;
535 * start at index 2 of plldivr_table as divider value at index 0
538 for (i = 2; i < sizeof(plldivr_table); i++) {
539 for (j = 0; j < sizeof(pllsaidivr_table); j++) {
540 div = plldivr_table[i] * pllsaidivr_table[j];
541 current_rate = pllsai_vco_rate / div;
542 /* perfect combination is found ? */
543 if (current_rate == rate) {
550 diff = (current_rate > rate) ?
551 current_rate - rate : rate - current_rate;
553 /* found a better combination ? */
554 if (diff < best_diff) {
565 /* Disable the SAI PLL */
566 clrbits_le32(®s->cr, RCC_CR_PLLSAION);
568 /* set pll_saidivr with found value */
569 clrsetbits_le32(®s->dckcfgr, RCC_DCKCFGR_PLLSAIDIVR_MASK,
570 best_pllsaidivr << RCC_DCKCFGR_PLLSAIDIVR_SHIFT);
572 /* set pllsair with found value */
573 clrsetbits_le32(®s->pllsaicfgr, RCC_PLLSAICFGR_PLLSAIR_MASK,
574 plldivr_table[best_plldivr]
575 << RCC_PLLSAICFGR_PLLSAIR_SHIFT);
577 /* Enable the SAI PLL */
578 setbits_le32(®s->cr, RCC_CR_PLLSAION);
579 while (!(readl(®s->cr) & RCC_CR_PLLSAIRDY))
582 div = plldivr_table[best_plldivr] * pllsaidivr_table[best_pllsaidivr];
583 return pllsai_vco_rate / div;
589 static int stm32_clk_enable(struct clk *clk)
591 struct stm32_clk *priv = dev_get_priv(clk->dev);
592 struct stm32_rcc_regs *regs = priv->base;
593 u32 offset = clk->id / 32;
594 u32 bit_index = clk->id % 32;
596 debug("%s: clkid = %ld, offset from AHB1ENR is %d, bit_index = %d\n",
597 __func__, clk->id, offset, bit_index);
598 setbits_le32(®s->ahb1enr + offset, BIT(bit_index));
603 static int stm32_clk_probe(struct udevice *dev)
605 struct ofnode_phandle_args args;
606 struct udevice *fixed_clock_dev = NULL;
610 debug("%s\n", __func__);
612 struct stm32_clk *priv = dev_get_priv(dev);
615 addr = dev_read_addr(dev);
616 if (addr == FDT_ADDR_T_NONE)
619 priv->base = (struct stm32_rcc_regs *)addr;
621 switch (dev_get_driver_data(dev)) {
623 memcpy(&priv->info, &stm32f4_clk_info,
624 sizeof(struct stm32_clk_info));
627 memcpy(&priv->info, &stm32f7_clk_info,
628 sizeof(struct stm32_clk_info));
634 /* retrieve HSE frequency (external oscillator) */
635 err = uclass_get_device_by_name(UCLASS_CLK, "clk-hse",
639 pr_err("Can't find fixed clock (%d)", err);
643 err = clk_request(fixed_clock_dev, &clk);
645 pr_err("Can't request %s clk (%d)", fixed_clock_dev->name,
651 * set pllm factor accordingly to the external oscillator
652 * frequency (HSE). For STM32F4 and STM32F7, we want VCO
654 * if input PLL frequency is 25Mhz, divide it by 25
657 priv->hse_rate = clk_get_rate(&clk);
659 if (priv->hse_rate < 1000000) {
660 pr_err("%s: unexpected HSE clock rate = %ld \"n", __func__,
665 priv->info.sys_pll_psc.pll_m = priv->hse_rate / 1000000;
667 if (priv->info.has_overdrive) {
668 err = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0,
671 debug("%s: can't find syscon device (%d)\n", __func__,
676 priv->pwr_regs = (struct stm32_pwr_regs *)ofnode_get_addr(args.node);
679 configure_clocks(dev);
684 static int stm32_clk_of_xlate(struct clk *clk, struct ofnode_phandle_args *args)
686 debug("%s(clk=%p)\n", __func__, clk);
688 if (args->args_count != 2) {
689 debug("Invaild args_count: %d\n", args->args_count);
693 if (args->args_count)
694 clk->id = args->args[1];
701 static struct clk_ops stm32_clk_ops = {
702 .of_xlate = stm32_clk_of_xlate,
703 .enable = stm32_clk_enable,
704 .get_rate = stm32_clk_get_rate,
705 .set_rate = stm32_set_rate,
708 U_BOOT_DRIVER(stm32fx_clk) = {
709 .name = "stm32fx_rcc_clock",
711 .ops = &stm32_clk_ops,
712 .probe = stm32_clk_probe,
713 .priv_auto_alloc_size = sizeof(struct stm32_clk),
714 .flags = DM_FLAG_PRE_RELOC,