X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Fclk%2Fclk_stm32mp1.c;h=24859fd054eec8812726eed3a98472fef97d9a1d;hb=1f4ae66eaab29bfb5d1eb44996f7826c9cd01ed1;hp=c67aa444735ae3261dcc2cd14ca3495a4950cc41;hpb=938e0e3f6e0911ca5329ac140ba1b0c55ded5340;p=oweals%2Fu-boot.git diff --git a/drivers/clk/clk_stm32mp1.c b/drivers/clk/clk_stm32mp1.c index c67aa44473..24859fd054 100644 --- a/drivers/clk/clk_stm32mp1.c +++ b/drivers/clk/clk_stm32mp1.c @@ -1,7 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* * Copyright (C) 2018, STMicroelectronics - All Rights Reserved - * - * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause */ #include @@ -16,10 +15,12 @@ #include #include +#ifndef CONFIG_STM32MP1_TRUSTED #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) /* activate clock tree initialization in the driver */ #define STM32MP1_CLOCK_TREE_INIT #endif +#endif #define MAX_HSI_HZ 64000000 @@ -99,9 +100,13 @@ #define RCC_QSPICKSELR 0x900 #define RCC_FMCCKSELR 0x904 #define RCC_USBCKSELR 0x91C +#define RCC_DSICKSELR 0x924 +#define RCC_ADCCKSELR 0x928 #define RCC_MP_APB1ENSETR 0xA00 #define RCC_MP_APB2ENSETR 0XA08 +#define RCC_MP_APB3ENSETR 0xA10 #define RCC_MP_AHB2ENSETR 0xA18 +#define RCC_MP_AHB3ENSETR 0xA20 #define RCC_MP_AHB4ENSETR 0xA28 /* used for most of SELR register */ @@ -147,6 +152,7 @@ #define RCC_BDCR_LSEON BIT(0) #define RCC_BDCR_LSEBYP BIT(1) #define RCC_BDCR_LSERDY BIT(2) +#define RCC_BDCR_DIGBYP BIT(3) #define RCC_BDCR_LSEDRV_MASK GENMASK(5, 4) #define RCC_BDCR_LSEDRV_SHIFT 4 #define RCC_BDCR_LSECSSON BIT(8) @@ -161,6 +167,7 @@ /* used for ALL PLLNCR registers */ #define RCC_PLLNCR_PLLON BIT(0) #define RCC_PLLNCR_PLLRDY BIT(1) +#define RCC_PLLNCR_SSCG_CTRL BIT(2) #define RCC_PLLNCR_DIVPEN BIT(4) #define RCC_PLLNCR_DIVQEN BIT(5) #define RCC_PLLNCR_DIVREN BIT(6) @@ -175,13 +182,14 @@ #define RCC_PLLNCFGR1_IFRGE_SHIFT 24 #define RCC_PLLNCFGR1_IFRGE_MASK GENMASK(25, 24) -/* used for ALL PLLNCFGR2 registers */ +/* used for ALL PLLNCFGR2 registers , using stm32mp1_div_id */ +#define RCC_PLLNCFGR2_SHIFT(div_id) ((div_id) * 8) #define RCC_PLLNCFGR2_DIVX_MASK GENMASK(6, 0) -#define RCC_PLLNCFGR2_DIVP_SHIFT 0 +#define RCC_PLLNCFGR2_DIVP_SHIFT RCC_PLLNCFGR2_SHIFT(_DIV_P) #define RCC_PLLNCFGR2_DIVP_MASK GENMASK(6, 0) -#define RCC_PLLNCFGR2_DIVQ_SHIFT 8 +#define RCC_PLLNCFGR2_DIVQ_SHIFT RCC_PLLNCFGR2_SHIFT(_DIV_Q) #define RCC_PLLNCFGR2_DIVQ_MASK GENMASK(14, 8) -#define RCC_PLLNCFGR2_DIVR_SHIFT 16 +#define RCC_PLLNCFGR2_DIVR_SHIFT RCC_PLLNCFGR2_SHIFT(_DIV_R) #define RCC_PLLNCFGR2_DIVR_MASK GENMASK(22, 16) /* used for ALL PLLNFRACR registers */ @@ -200,6 +208,7 @@ /* used for RCC_OCENSETR and RCC_OCENCLRR registers */ #define RCC_OCENR_HSION BIT(0) #define RCC_OCENR_CSION BIT(4) +#define RCC_OCENR_DIGBYP BIT(7) #define RCC_OCENR_HSEON BIT(8) #define RCC_OCENR_HSEBYP BIT(10) #define RCC_OCENR_HSECSSON BIT(11) @@ -235,7 +244,6 @@ enum stm32mp1_parent_id { _LSI, _LSE, _I2S_CKIN, - _USB_PHY_48, NB_OSC, /* other parent source */ @@ -266,6 +274,8 @@ enum stm32mp1_parent_id { _CK_PER, _CK_MPU, _CK_MCU, + _DSI_PHY, + _USB_PHY_48, _PARENT_NB, _UNKNOWN_ID = 0xff, }; @@ -286,6 +296,8 @@ enum stm32mp1_parent_sel { _USBPHY_SEL, _USBO_SEL, _STGEN_SEL, + _DSI_SEL, + _ADC12_SEL, _PARENT_SEL_NB, _UNKNOWN_SEL = 0xff, }; @@ -509,6 +521,11 @@ static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = { STM32MP1_CLK_SET_CLR(RCC_MP_APB2ENSETR, 13, USART6_K, _UART6_SEL), + STM32MP1_CLK_SET_CLR_F(RCC_MP_APB3ENSETR, 13, VREF, _PCLK3), + + STM32MP1_CLK_SET_CLR_F(RCC_MP_APB4ENSETR, 0, LTDC_PX, _PLL4_Q), + STM32MP1_CLK_SET_CLR_F(RCC_MP_APB4ENSETR, 4, DSI_PX, _PLL4_Q), + STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 4, DSI_K, _DSI_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 8, DDRPERFM, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 15, IWDG2, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB4ENSETR, 16, USBPHY_K, _USBPHY_SEL), @@ -516,9 +533,14 @@ static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = { STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 2, I2C4_K, _I2C46_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 20, STGEN_K, _STGEN_SEL), + STM32MP1_CLK_SET_CLR_F(RCC_MP_AHB2ENSETR, 5, ADC12, _HCLK2), + STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 5, ADC12_K, _ADC12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 8, USBO_K, _USBO_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB2ENSETR, 16, SDMMC3_K, _SDMMC3_SEL), + STM32MP1_CLK_SET_CLR(RCC_MP_AHB3ENSETR, 11, HSEM, _UNKNOWN_SEL), + STM32MP1_CLK_SET_CLR(RCC_MP_AHB3ENSETR, 12, IPCC, _UNKNOWN_SEL), + STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 0, GPIOA, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 1, GPIOB, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 2, GPIOC, _UNKNOWN_SEL), @@ -533,10 +555,9 @@ static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = { STM32MP1_CLK_SET_CLR(RCC_MP_AHB5ENSETR, 0, GPIOZ, _UNKNOWN_SEL), - STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 7, ETHCK, _UNKNOWN_SEL), + STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 7, ETHCK, _ETH_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 8, ETHTX, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 9, ETHRX, _UNKNOWN_SEL), - STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 10, ETHMAC_K, _ETH_SEL), STM32MP1_CLK_SET_CLR_F(RCC_MP_AHB6ENSETR, 10, ETHMAC, _ACLK), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 12, FMC_K, _FMC_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 14, QSPI_K, _QSPI_SEL), @@ -566,6 +587,8 @@ static const u8 fmc_parents[] = {_ACLK, _PLL3_R, _PLL4_P, _CK_PER}; static const u8 usbphy_parents[] = {_HSE_KER, _PLL4_R, _HSE_KER_DIV2}; static const u8 usbo_parents[] = {_PLL4_R, _USB_PHY_48}; static const u8 stgen_parents[] = {_HSI_KER, _HSE_KER}; +static const u8 dsi_parents[] = {_DSI_PHY, _PLL4_P}; +static const u8 adc_parents[] = {_PLL4_R, _CK_PER, _PLL3_Q}; static const struct stm32mp1_clk_sel stm32mp1_clk_sel[_PARENT_SEL_NB] = { STM32MP1_CLK_PARENT(_I2C12_SEL, RCC_I2C12CKSELR, 0, 0x7, i2c12_parents), @@ -588,6 +611,8 @@ static const struct stm32mp1_clk_sel stm32mp1_clk_sel[_PARENT_SEL_NB] = { STM32MP1_CLK_PARENT(_USBPHY_SEL, RCC_USBCKSELR, 0, 0x3, usbphy_parents), STM32MP1_CLK_PARENT(_USBO_SEL, RCC_USBCKSELR, 4, 0x1, usbo_parents), STM32MP1_CLK_PARENT(_STGEN_SEL, RCC_STGENCKSELR, 0, 0x3, stgen_parents), + STM32MP1_CLK_PARENT(_DSI_SEL, RCC_DSICKSELR, 0, 0x1, dsi_parents), + STM32MP1_CLK_PARENT(_ADC12_SEL, RCC_ADCCKSELR, 0, 0x1, adc_parents), }; #ifdef STM32MP1_CLOCK_TREE_INIT @@ -644,8 +669,8 @@ static const u8 stm32mp1_axi_div[8] = { 1, 2, 3, 4, 4, 4, 4, 4 }; -#ifdef DEBUG -static const char * const stm32mp1_clk_parent_name[_PARENT_NB] = { +static const __maybe_unused +char * const stm32mp1_clk_parent_name[_PARENT_NB] = { [_HSI] = "HSI", [_HSE] = "HSE", [_CSI] = "CSI", @@ -679,10 +704,12 @@ static const char * const stm32mp1_clk_parent_name[_PARENT_NB] = { [_CK_PER] = "CK_PER", [_CK_MPU] = "CK_MPU", [_CK_MCU] = "CK_MCU", - [_USB_PHY_48] = "USB_PHY_48" + [_USB_PHY_48] = "USB_PHY_48", + [_DSI_PHY] = "DSI_PHY_PLL", }; -static const char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = { +static const __maybe_unused +char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = { [_I2C12_SEL] = "I2C12", [_I2C35_SEL] = "I2C35", [_I2C46_SEL] = "I2C46", @@ -697,9 +724,10 @@ static const char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = { [_FMC_SEL] = "FMC", [_USBPHY_SEL] = "USBPHY", [_USBO_SEL] = "USBO", - [_STGEN_SEL] = "STGEN" + [_STGEN_SEL] = "STGEN", + [_DSI_SEL] = "DSI", + [_ADC12_SEL] = "ADC12", }; -#endif static const struct stm32mp1_clk_data stm32mp1_data = { .gate = stm32mp1_clk_gate, @@ -805,60 +833,87 @@ static int stm32mp1_clk_get_parent(struct stm32mp1_clk_priv *priv, return -EINVAL; } -static ulong stm32mp1_read_pll_freq(struct stm32mp1_clk_priv *priv, - int pll_id, int div_id) +static ulong pll_get_fref_ck(struct stm32mp1_clk_priv *priv, + int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; - int divm, divn, divy, src; - ulong refclk, dfout; - u32 selr, cfgr1, cfgr2, fracr; - const u8 shift[_DIV_NB] = { - [_DIV_P] = RCC_PLLNCFGR2_DIVP_SHIFT, - [_DIV_Q] = RCC_PLLNCFGR2_DIVQ_SHIFT, - [_DIV_R] = RCC_PLLNCFGR2_DIVR_SHIFT }; - - debug("%s(%d, %d)\n", __func__, pll_id, div_id); - if (div_id > _DIV_NB) - return 0; + u32 selr; + int src; + ulong refclk; + /* Get current refclk */ selr = readl(priv->base + pll[pll_id].rckxselr); + src = selr & RCC_SELR_SRC_MASK; + + refclk = stm32mp1_clk_get_fixed(priv, pll[pll_id].refclk[src]); + debug("PLL%d : selr=%x refclk = %d kHz\n", + pll_id, selr, (u32)(refclk / 1000)); + + return refclk; +} + +/* + * pll_get_fvco() : return the VCO or (VCO / 2) frequency for the requested PLL + * - PLL1 & PLL2 => return VCO / 2 with Fpll_y_ck = FVCO / 2 * (DIVy + 1) + * - PLL3 & PLL4 => return VCO with Fpll_y_ck = FVCO / (DIVy + 1) + * => in all the case Fpll_y_ck = pll_get_fvco() / (DIVy + 1) + */ +static ulong pll_get_fvco(struct stm32mp1_clk_priv *priv, + int pll_id) +{ + const struct stm32mp1_clk_pll *pll = priv->data->pll; + int divm, divn; + ulong refclk, fvco; + u32 cfgr1, fracr; + cfgr1 = readl(priv->base + pll[pll_id].pllxcfgr1); - cfgr2 = readl(priv->base + pll[pll_id].pllxcfgr2); fracr = readl(priv->base + pll[pll_id].pllxfracr); - debug("PLL%d : selr=%x cfgr1=%x cfgr2=%x fracr=%x\n", - pll_id, selr, cfgr1, cfgr2, fracr); - divm = (cfgr1 & (RCC_PLLNCFGR1_DIVM_MASK)) >> RCC_PLLNCFGR1_DIVM_SHIFT; divn = cfgr1 & RCC_PLLNCFGR1_DIVN_MASK; - divy = (cfgr2 >> shift[div_id]) & RCC_PLLNCFGR2_DIVX_MASK; - - debug(" DIVN=%d DIVM=%d DIVY=%d\n", divn, divm, divy); - src = selr & RCC_SELR_SRC_MASK; - refclk = stm32mp1_clk_get_fixed(priv, pll[pll_id].refclk[src]); + debug("PLL%d : cfgr1=%x fracr=%x DIVN=%d DIVM=%d\n", + pll_id, cfgr1, fracr, divn, divm); - debug(" refclk = %d kHz\n", (u32)(refclk / 1000)); + refclk = pll_get_fref_ck(priv, pll_id); - /* - * For: PLL1 & PLL2 => VCO is * 2 but ck_pll_y is also / 2 - * So same final result than PLL2 et 4 - * with FRACV : - * Fck_pll_y = Fck_ref * ((DIVN + 1) + FRACV / 2^13) - * / (DIVM + 1) * (DIVy + 1) + /* with FRACV : + * Fvco = Fck_ref * ((DIVN + 1) + FRACV / 2^13) / (DIVM + 1) * without FRACV - * Fck_pll_y = Fck_ref * ((DIVN + 1) / (DIVM + 1) *(DIVy + 1) + * Fvco = Fck_ref * ((DIVN + 1) / (DIVM + 1) */ if (fracr & RCC_PLLNFRACR_FRACLE) { u32 fracv = (fracr & RCC_PLLNFRACR_FRACV_MASK) >> RCC_PLLNFRACR_FRACV_SHIFT; - dfout = (ulong)lldiv((unsigned long long)refclk * + fvco = (ulong)lldiv((unsigned long long)refclk * (((divn + 1) << 13) + fracv), - ((unsigned long long)(divm + 1) * - (divy + 1)) << 13); + ((unsigned long long)(divm + 1)) << 13); } else { - dfout = (ulong)(refclk * (divn + 1) / (divm + 1) * (divy + 1)); + fvco = (ulong)(refclk * (divn + 1) / (divm + 1)); } + debug("PLL%d : %s = %ld\n", pll_id, __func__, fvco); + + return fvco; +} + +static ulong stm32mp1_read_pll_freq(struct stm32mp1_clk_priv *priv, + int pll_id, int div_id) +{ + const struct stm32mp1_clk_pll *pll = priv->data->pll; + int divy; + ulong dfout; + u32 cfgr2; + + debug("%s(%d, %d)\n", __func__, pll_id, div_id); + if (div_id >= _DIV_NB) + return 0; + + cfgr2 = readl(priv->base + pll[pll_id].pllxcfgr2); + divy = (cfgr2 >> RCC_PLLNCFGR2_SHIFT(div_id)) & RCC_PLLNCFGR2_DIVX_MASK; + + debug("PLL%d : cfgr2=%x DIVY=%d\n", pll_id, cfgr2, divy); + + dfout = pll_get_fvco(priv, pll_id) / (divy + 1); debug(" => dfout = %d kHz\n", (u32)(dfout / 1000)); return dfout; @@ -1028,9 +1083,24 @@ static ulong stm32mp1_clk_get(struct stm32mp1_clk_priv *priv, int p) break; /* other */ case _USB_PHY_48: - clock = stm32mp1_clk_get_fixed(priv, _USB_PHY_48); + clock = 48000000; break; - + case _DSI_PHY: + { + struct clk clk; + struct udevice *dev = NULL; + + if (!uclass_get_device_by_name(UCLASS_CLK, "ck_dsi_phy", + &dev)) { + if (clk_request(dev, &clk)) { + pr_err("ck_dsi_phy request"); + } else { + clk.id = 0; + clock = clk_get_rate(&clk); + } + } + break; + } default: break; } @@ -1113,10 +1183,7 @@ static void stm32mp1_ls_osc_set(int enable, fdt_addr_t rcc, u32 offset, static void stm32mp1_hs_ocs_set(int enable, fdt_addr_t rcc, u32 mask_on) { - if (enable) - setbits_le32(rcc + RCC_OCENSETR, mask_on); - else - setbits_le32(rcc + RCC_OCENCLRR, mask_on); + writel(mask_on, rcc + (enable ? RCC_OCENSETR : RCC_OCENCLRR)); } static int stm32mp1_osc_wait(int enable, fdt_addr_t rcc, u32 offset, @@ -1141,11 +1208,15 @@ static int stm32mp1_osc_wait(int enable, fdt_addr_t rcc, u32 offset, return ret; } -static void stm32mp1_lse_enable(fdt_addr_t rcc, int bypass, int lsedrv) +static void stm32mp1_lse_enable(fdt_addr_t rcc, int bypass, int digbyp, + int lsedrv) { u32 value; - if (bypass) + if (digbyp) + setbits_le32(rcc + RCC_BDCR, RCC_BDCR_DIGBYP); + + if (bypass || digbyp) setbits_le32(rcc + RCC_BDCR, RCC_BDCR_LSEBYP); /* @@ -1180,21 +1251,23 @@ static void stm32mp1_lsi_set(fdt_addr_t rcc, int enable) stm32mp1_osc_wait(enable, rcc, RCC_RDLSICR, RCC_RDLSICR_LSIRDY); } -static void stm32mp1_hse_enable(fdt_addr_t rcc, int bypass, int css) +static void stm32mp1_hse_enable(fdt_addr_t rcc, int bypass, int digbyp, int css) { - if (bypass) - setbits_le32(rcc + RCC_OCENSETR, RCC_OCENR_HSEBYP); + if (digbyp) + writel(RCC_OCENR_DIGBYP, rcc + RCC_OCENSETR); + if (bypass || digbyp) + writel(RCC_OCENR_HSEBYP, rcc + RCC_OCENSETR); stm32mp1_hs_ocs_set(1, rcc, RCC_OCENR_HSEON); stm32mp1_osc_wait(1, rcc, RCC_OCRDYR, RCC_OCRDYR_HSERDY); if (css) - setbits_le32(rcc + RCC_OCENSETR, RCC_OCENR_HSECSSON); + writel(RCC_OCENR_HSECSSON, rcc + RCC_OCENSETR); } static void stm32mp1_csi_set(fdt_addr_t rcc, int enable) { - stm32mp1_ls_osc_set(enable, rcc, RCC_OCENSETR, RCC_OCENR_CSION); + stm32mp1_hs_ocs_set(enable, rcc, RCC_OCENR_CSION); stm32mp1_osc_wait(enable, rcc, RCC_OCRDYR, RCC_OCRDYR_CSIRDY); } @@ -1249,7 +1322,10 @@ static void pll_start(struct stm32mp1_clk_priv *priv, int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; - writel(RCC_PLLNCR_PLLON, priv->base + pll[pll_id].pllxcr); + clrsetbits_le32(priv->base + pll[pll_id].pllxcr, + RCC_PLLNCR_DIVPEN | RCC_PLLNCR_DIVQEN | + RCC_PLLNCR_DIVREN, + RCC_PLLNCR_PLLON); } static int pll_output(struct stm32mp1_clk_priv *priv, int pll_id, int output) @@ -1368,6 +1444,8 @@ static void pll_csg(struct stm32mp1_clk_priv *priv, int pll_id, u32 *csg) RCC_PLLNCSGR_SSCG_MODE_MASK); writel(pllxcsg, priv->base + pll[pll_id].pllxcsgr); + + setbits_le32(priv->base + pll[pll_id].pllxcr, RCC_PLLNCR_SSCG_CTRL); } static int set_clksrc(struct stm32mp1_clk_priv *priv, unsigned int clksrc) @@ -1399,10 +1477,15 @@ static void stgen_config(struct stm32mp1_clk_priv *priv) rate = stm32mp1_clk_get(priv, p); if (cntfid0 != rate) { + u64 counter; + pr_debug("System Generic Counter (STGEN) update\n"); clrbits_le32(stgenc + STGENC_CNTCR, STGENC_CNTCR_EN); - writel(0x0, stgenc + STGENC_CNTCVL); - writel(0x0, stgenc + STGENC_CNTCVU); + counter = (u64)readl(stgenc + STGENC_CNTCVL); + counter |= ((u64)(readl(stgenc + STGENC_CNTCVU))) << 32; + counter = lldiv(counter * (u64)rate, cntfid0); + writel((u32)counter, stgenc + STGENC_CNTCVL); + writel((u32)(counter >> 32), stgenc + STGENC_CNTCVU); writel(rate, stgenc + STGENC_CNTFID0); setbits_le32(stgenc + STGENC_CNTCR, STGENC_CNTCR_EN); @@ -1545,26 +1628,27 @@ static int stm32mp1_clktree(struct udevice *dev) stm32mp1_lsi_set(rcc, 1); if (priv->osc[_LSE]) { - int bypass; - int lsedrv; + int bypass, digbyp, lsedrv; struct udevice *dev = priv->osc_dev[_LSE]; bypass = dev_read_bool(dev, "st,bypass"); + digbyp = dev_read_bool(dev, "st,digbypass"); lse_css = dev_read_bool(dev, "st,css"); lsedrv = dev_read_u32_default(dev, "st,drive", LSEDRV_MEDIUM_HIGH); - stm32mp1_lse_enable(rcc, bypass, lsedrv); + stm32mp1_lse_enable(rcc, bypass, digbyp, lsedrv); } if (priv->osc[_HSE]) { - int bypass, css; + int bypass, digbyp, css; struct udevice *dev = priv->osc_dev[_HSE]; bypass = dev_read_bool(dev, "st,bypass"); + digbyp = dev_read_bool(dev, "st,digbypass"); css = dev_read_bool(dev, "st,css"); - stm32mp1_hse_enable(rcc, bypass, css); + stm32mp1_hse_enable(rcc, bypass, digbyp, css); } /* CSI is mandatory for automatic I/O compensation (SYSCFG_CMPCR) * => switch on CSI even if node is not present in device tree @@ -1693,6 +1777,70 @@ static int stm32mp1_clktree(struct udevice *dev) } #endif /* STM32MP1_CLOCK_TREE_INIT */ +static int pll_set_output_rate(struct udevice *dev, + int pll_id, + int div_id, + unsigned long clk_rate) +{ + struct stm32mp1_clk_priv *priv = dev_get_priv(dev); + const struct stm32mp1_clk_pll *pll = priv->data->pll; + u32 pllxcr = priv->base + pll[pll_id].pllxcr; + int div; + ulong fvco; + + if (div_id > _DIV_NB) + return -EINVAL; + + fvco = pll_get_fvco(priv, pll_id); + + if (fvco <= clk_rate) + div = 1; + else + div = DIV_ROUND_UP(fvco, clk_rate); + + if (div > 128) + div = 128; + + debug("fvco = %ld, clk_rate = %ld, div=%d\n", fvco, clk_rate, div); + /* stop the requested output */ + clrbits_le32(pllxcr, 0x1 << div_id << RCC_PLLNCR_DIVEN_SHIFT); + /* change divider */ + clrsetbits_le32(priv->base + pll[pll_id].pllxcfgr2, + RCC_PLLNCFGR2_DIVX_MASK << RCC_PLLNCFGR2_SHIFT(div_id), + (div - 1) << RCC_PLLNCFGR2_SHIFT(div_id)); + /* start the requested output */ + setbits_le32(pllxcr, 0x1 << div_id << RCC_PLLNCR_DIVEN_SHIFT); + + return 0; +} + +static ulong stm32mp1_clk_set_rate(struct clk *clk, unsigned long clk_rate) +{ + struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); + int p; + + switch (clk->id) { + case LTDC_PX: + case DSI_PX: + break; + default: + pr_err("not supported"); + return -EINVAL; + } + + p = stm32mp1_clk_get_parent(priv, clk->id); + if (p < 0) + return -EINVAL; + + switch (p) { + case _PLL4_Q: + /* for LTDC_PX and DSI_PX case */ + return pll_set_output_rate(clk->dev, _PLL4, _DIV_Q, clk_rate); + } + + return -EINVAL; +} + static void stm32mp1_osc_clk_init(const char *name, struct stm32mp1_clk_priv *priv, int index) @@ -1722,7 +1870,7 @@ static void stm32mp1_osc_init(struct udevice *dev) [_HSE] = "clk-hse", [_CSI] = "clk-csi", [_I2S_CKIN] = "i2s_ckin", - [_USB_PHY_48] = "ck_usbo_48m"}; + }; for (i = 0; i < NB_OSC; i++) { stm32mp1_osc_clk_init(name[i], priv, i); @@ -1730,6 +1878,54 @@ static void stm32mp1_osc_init(struct udevice *dev) } } +static void __maybe_unused stm32mp1_clk_dump(struct stm32mp1_clk_priv *priv) +{ + char buf[32]; + int i, s, p; + + printf("Clocks:\n"); + for (i = 0; i < _PARENT_NB; i++) { + printf("- %s : %s MHz\n", + stm32mp1_clk_parent_name[i], + strmhz(buf, stm32mp1_clk_get(priv, i))); + } + printf("Source Clocks:\n"); + for (i = 0; i < _PARENT_SEL_NB; i++) { + p = (readl(priv->base + priv->data->sel[i].offset) >> + priv->data->sel[i].src) & priv->data->sel[i].msk; + if (p < priv->data->sel[i].nb_parent) { + s = priv->data->sel[i].parent[p]; + printf("- %s(%d) => parent %s(%d)\n", + stm32mp1_clk_parent_sel_name[i], i, + stm32mp1_clk_parent_name[s], s); + } else { + printf("- %s(%d) => parent index %d is invalid\n", + stm32mp1_clk_parent_sel_name[i], i, p); + } + } +} + +#ifdef CONFIG_CMD_CLK +int soc_clk_dump(void) +{ + struct udevice *dev; + struct stm32mp1_clk_priv *priv; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_CLK, + DM_GET_DRIVER(stm32mp1_clock), + &dev); + if (ret) + return ret; + + priv = dev_get_priv(dev); + + stm32mp1_clk_dump(priv); + + return 0; +} +#endif + static int stm32mp1_clk_probe(struct udevice *dev) { int result = 0; @@ -1753,6 +1949,33 @@ static int stm32mp1_clk_probe(struct udevice *dev) result = stm32mp1_clktree(dev); #endif +#ifndef CONFIG_SPL_BUILD +#if defined(DEBUG) + /* display debug information for probe after relocation */ + if (gd->flags & GD_FLG_RELOC) + stm32mp1_clk_dump(priv); +#endif + +#if defined(CONFIG_DISPLAY_CPUINFO) + if (gd->flags & GD_FLG_RELOC) { + char buf[32]; + + printf("Clocks:\n"); + printf("- MPU : %s MHz\n", + strmhz(buf, stm32mp1_clk_get(priv, _CK_MPU))); + printf("- MCU : %s MHz\n", + strmhz(buf, stm32mp1_clk_get(priv, _CK_MCU))); + printf("- AXI : %s MHz\n", + strmhz(buf, stm32mp1_clk_get(priv, _ACLK))); + printf("- PER : %s MHz\n", + strmhz(buf, stm32mp1_clk_get(priv, _CK_PER))); + /* DDRPHYC father */ + printf("- DDR : %s MHz\n", + strmhz(buf, stm32mp1_clk_get(priv, _PLL2_R))); + } +#endif /* CONFIG_DISPLAY_CPUINFO */ +#endif + return result; } @@ -1760,17 +1983,12 @@ static const struct clk_ops stm32mp1_clk_ops = { .enable = stm32mp1_clk_enable, .disable = stm32mp1_clk_disable, .get_rate = stm32mp1_clk_get_rate, -}; - -static const struct udevice_id stm32mp1_clk_ids[] = { - { .compatible = "st,stm32mp1-rcc-clk" }, - { } + .set_rate = stm32mp1_clk_set_rate, }; U_BOOT_DRIVER(stm32mp1_clock) = { .name = "stm32mp1_clk", .id = UCLASS_CLK, - .of_match = stm32mp1_clk_ids, .ops = &stm32mp1_clk_ops, .priv_auto_alloc_size = sizeof(struct stm32mp1_clk_priv), .probe = stm32mp1_clk_probe,