// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* * Copyright (C) 2018, STMicroelectronics - All Rights Reserved */ #define LOG_CATEGORY UCLASS_CLK #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_SPL_BUILD) /* activate clock tree initialization in the driver */ #define STM32MP1_CLOCK_TREE_INIT #endif #define MAX_HSI_HZ 64000000 /* TIMEOUT */ #define TIMEOUT_200MS 200000 #define TIMEOUT_1S 1000000 /* STGEN registers */ #define STGENC_CNTCR 0x00 #define STGENC_CNTSR 0x04 #define STGENC_CNTCVL 0x08 #define STGENC_CNTCVU 0x0C #define STGENC_CNTFID0 0x20 #define STGENC_CNTCR_EN BIT(0) /* RCC registers */ #define RCC_OCENSETR 0x0C #define RCC_OCENCLRR 0x10 #define RCC_HSICFGR 0x18 #define RCC_MPCKSELR 0x20 #define RCC_ASSCKSELR 0x24 #define RCC_RCK12SELR 0x28 #define RCC_MPCKDIVR 0x2C #define RCC_AXIDIVR 0x30 #define RCC_APB4DIVR 0x3C #define RCC_APB5DIVR 0x40 #define RCC_RTCDIVR 0x44 #define RCC_MSSCKSELR 0x48 #define RCC_PLL1CR 0x80 #define RCC_PLL1CFGR1 0x84 #define RCC_PLL1CFGR2 0x88 #define RCC_PLL1FRACR 0x8C #define RCC_PLL1CSGR 0x90 #define RCC_PLL2CR 0x94 #define RCC_PLL2CFGR1 0x98 #define RCC_PLL2CFGR2 0x9C #define RCC_PLL2FRACR 0xA0 #define RCC_PLL2CSGR 0xA4 #define RCC_I2C46CKSELR 0xC0 #define RCC_SPI6CKSELR 0xC4 #define RCC_UART1CKSELR 0xC8 #define RCC_CPERCKSELR 0xD0 #define RCC_STGENCKSELR 0xD4 #define RCC_DDRITFCR 0xD8 #define RCC_BDCR 0x140 #define RCC_RDLSICR 0x144 #define RCC_MP_APB4ENSETR 0x200 #define RCC_MP_APB5ENSETR 0x208 #define RCC_MP_AHB5ENSETR 0x210 #define RCC_MP_AHB6ENSETR 0x218 #define RCC_OCRDYR 0x808 #define RCC_DBGCFGR 0x80C #define RCC_RCK3SELR 0x820 #define RCC_RCK4SELR 0x824 #define RCC_MCUDIVR 0x830 #define RCC_APB1DIVR 0x834 #define RCC_APB2DIVR 0x838 #define RCC_APB3DIVR 0x83C #define RCC_PLL3CR 0x880 #define RCC_PLL3CFGR1 0x884 #define RCC_PLL3CFGR2 0x888 #define RCC_PLL3FRACR 0x88C #define RCC_PLL3CSGR 0x890 #define RCC_PLL4CR 0x894 #define RCC_PLL4CFGR1 0x898 #define RCC_PLL4CFGR2 0x89C #define RCC_PLL4FRACR 0x8A0 #define RCC_PLL4CSGR 0x8A4 #define RCC_I2C12CKSELR 0x8C0 #define RCC_I2C35CKSELR 0x8C4 #define RCC_SPI2S1CKSELR 0x8D8 #define RCC_SPI2S23CKSELR 0x8DC #define RCC_SPI45CKSELR 0x8E0 #define RCC_UART6CKSELR 0x8E4 #define RCC_UART24CKSELR 0x8E8 #define RCC_UART35CKSELR 0x8EC #define RCC_UART78CKSELR 0x8F0 #define RCC_SDMMC12CKSELR 0x8F4 #define RCC_SDMMC3CKSELR 0x8F8 #define RCC_ETHCKSELR 0x8FC #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 */ #define RCC_SELR_SRC_MASK GENMASK(2, 0) #define RCC_SELR_SRCRDY BIT(31) /* Values of RCC_MPCKSELR register */ #define RCC_MPCKSELR_HSI 0 #define RCC_MPCKSELR_HSE 1 #define RCC_MPCKSELR_PLL 2 #define RCC_MPCKSELR_PLL_MPUDIV 3 /* Values of RCC_ASSCKSELR register */ #define RCC_ASSCKSELR_HSI 0 #define RCC_ASSCKSELR_HSE 1 #define RCC_ASSCKSELR_PLL 2 /* Values of RCC_MSSCKSELR register */ #define RCC_MSSCKSELR_HSI 0 #define RCC_MSSCKSELR_HSE 1 #define RCC_MSSCKSELR_CSI 2 #define RCC_MSSCKSELR_PLL 3 /* Values of RCC_CPERCKSELR register */ #define RCC_CPERCKSELR_HSI 0 #define RCC_CPERCKSELR_CSI 1 #define RCC_CPERCKSELR_HSE 2 /* used for most of DIVR register : max div for RTC */ #define RCC_DIVR_DIV_MASK GENMASK(5, 0) #define RCC_DIVR_DIVRDY BIT(31) /* Masks for specific DIVR registers */ #define RCC_APBXDIV_MASK GENMASK(2, 0) #define RCC_MPUDIV_MASK GENMASK(2, 0) #define RCC_AXIDIV_MASK GENMASK(2, 0) #define RCC_MCUDIV_MASK GENMASK(3, 0) /* offset between RCC_MP_xxxENSETR and RCC_MP_xxxENCLRR registers */ #define RCC_MP_ENCLRR_OFFSET 4 /* Fields of RCC_BDCR register */ #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) #define RCC_BDCR_RTCCKEN BIT(20) #define RCC_BDCR_RTCSRC_MASK GENMASK(17, 16) #define RCC_BDCR_RTCSRC_SHIFT 16 /* Fields of RCC_RDLSICR register */ #define RCC_RDLSICR_LSION BIT(0) #define RCC_RDLSICR_LSIRDY BIT(1) /* 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) #define RCC_PLLNCR_DIVEN_SHIFT 4 /* used for ALL PLLNCFGR1 registers */ #define RCC_PLLNCFGR1_DIVM_SHIFT 16 #define RCC_PLLNCFGR1_DIVM_MASK GENMASK(21, 16) #define RCC_PLLNCFGR1_DIVN_SHIFT 0 #define RCC_PLLNCFGR1_DIVN_MASK GENMASK(8, 0) /* only for PLL3 and PLL4 */ #define RCC_PLLNCFGR1_IFRGE_SHIFT 24 #define RCC_PLLNCFGR1_IFRGE_MASK GENMASK(25, 24) /* 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 RCC_PLLNCFGR2_SHIFT(_DIV_P) #define RCC_PLLNCFGR2_DIVP_MASK GENMASK(6, 0) #define RCC_PLLNCFGR2_DIVQ_SHIFT RCC_PLLNCFGR2_SHIFT(_DIV_Q) #define RCC_PLLNCFGR2_DIVQ_MASK GENMASK(14, 8) #define RCC_PLLNCFGR2_DIVR_SHIFT RCC_PLLNCFGR2_SHIFT(_DIV_R) #define RCC_PLLNCFGR2_DIVR_MASK GENMASK(22, 16) /* used for ALL PLLNFRACR registers */ #define RCC_PLLNFRACR_FRACV_SHIFT 3 #define RCC_PLLNFRACR_FRACV_MASK GENMASK(15, 3) #define RCC_PLLNFRACR_FRACLE BIT(16) /* used for ALL PLLNCSGR registers */ #define RCC_PLLNCSGR_INC_STEP_SHIFT 16 #define RCC_PLLNCSGR_INC_STEP_MASK GENMASK(30, 16) #define RCC_PLLNCSGR_MOD_PER_SHIFT 0 #define RCC_PLLNCSGR_MOD_PER_MASK GENMASK(12, 0) #define RCC_PLLNCSGR_SSCG_MODE_SHIFT 15 #define RCC_PLLNCSGR_SSCG_MODE_MASK BIT(15) /* 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) /* Fields of RCC_OCRDYR register */ #define RCC_OCRDYR_HSIRDY BIT(0) #define RCC_OCRDYR_HSIDIVRDY BIT(2) #define RCC_OCRDYR_CSIRDY BIT(4) #define RCC_OCRDYR_HSERDY BIT(8) /* Fields of DDRITFCR register */ #define RCC_DDRITFCR_DDRCKMOD_MASK GENMASK(22, 20) #define RCC_DDRITFCR_DDRCKMOD_SHIFT 20 #define RCC_DDRITFCR_DDRCKMOD_SSR 0 /* Fields of RCC_HSICFGR register */ #define RCC_HSICFGR_HSIDIV_MASK GENMASK(1, 0) /* used for MCO related operations */ #define RCC_MCOCFG_MCOON BIT(12) #define RCC_MCOCFG_MCODIV_MASK GENMASK(7, 4) #define RCC_MCOCFG_MCODIV_SHIFT 4 #define RCC_MCOCFG_MCOSRC_MASK GENMASK(2, 0) enum stm32mp1_parent_id { /* * _HSI, _HSE, _CSI, _LSI, _LSE should not be moved * they are used as index in osc_clk[] as clock reference */ _HSI, _HSE, _CSI, _LSI, _LSE, _I2S_CKIN, NB_OSC, /* other parent source */ _HSI_KER = NB_OSC, _HSE_KER, _HSE_KER_DIV2, _CSI_KER, _PLL1_P, _PLL1_Q, _PLL1_R, _PLL2_P, _PLL2_Q, _PLL2_R, _PLL3_P, _PLL3_Q, _PLL3_R, _PLL4_P, _PLL4_Q, _PLL4_R, _ACLK, _PCLK1, _PCLK2, _PCLK3, _PCLK4, _PCLK5, _HCLK6, _HCLK2, _CK_PER, _CK_MPU, _CK_MCU, _DSI_PHY, _USB_PHY_48, _PARENT_NB, _UNKNOWN_ID = 0xff, }; enum stm32mp1_parent_sel { _I2C12_SEL, _I2C35_SEL, _I2C46_SEL, _UART6_SEL, _UART24_SEL, _UART35_SEL, _UART78_SEL, _SDMMC12_SEL, _SDMMC3_SEL, _ETH_SEL, _QSPI_SEL, _FMC_SEL, _USBPHY_SEL, _USBO_SEL, _STGEN_SEL, _DSI_SEL, _ADC12_SEL, _SPI1_SEL, _SPI23_SEL, _SPI45_SEL, _SPI6_SEL, _RTC_SEL, _UART1_SEL, _PARENT_SEL_NB, _UNKNOWN_SEL = 0xff, }; enum stm32mp1_pll_id { _PLL1, _PLL2, _PLL3, _PLL4, _PLL_NB }; enum stm32mp1_div_id { _DIV_P, _DIV_Q, _DIV_R, _DIV_NB, }; enum stm32mp1_clksrc_id { CLKSRC_MPU, CLKSRC_AXI, CLKSRC_MCU, CLKSRC_PLL12, CLKSRC_PLL3, CLKSRC_PLL4, CLKSRC_RTC, CLKSRC_MCO1, CLKSRC_MCO2, CLKSRC_NB }; enum stm32mp1_clkdiv_id { CLKDIV_MPU, CLKDIV_AXI, CLKDIV_MCU, CLKDIV_APB1, CLKDIV_APB2, CLKDIV_APB3, CLKDIV_APB4, CLKDIV_APB5, CLKDIV_RTC, CLKDIV_MCO1, CLKDIV_MCO2, CLKDIV_NB }; enum stm32mp1_pllcfg { PLLCFG_M, PLLCFG_N, PLLCFG_P, PLLCFG_Q, PLLCFG_R, PLLCFG_O, PLLCFG_NB }; enum stm32mp1_pllcsg { PLLCSG_MOD_PER, PLLCSG_INC_STEP, PLLCSG_SSCG_MODE, PLLCSG_NB }; enum stm32mp1_plltype { PLL_800, PLL_1600, PLL_TYPE_NB }; struct stm32mp1_pll { u8 refclk_min; u8 refclk_max; u8 divn_max; }; struct stm32mp1_clk_gate { u16 offset; u8 bit; u8 index; u8 set_clr; u8 sel; u8 fixed; }; struct stm32mp1_clk_sel { u16 offset; u8 src; u8 msk; u8 nb_parent; const u8 *parent; }; #define REFCLK_SIZE 4 struct stm32mp1_clk_pll { enum stm32mp1_plltype plltype; u16 rckxselr; u16 pllxcfgr1; u16 pllxcfgr2; u16 pllxfracr; u16 pllxcr; u16 pllxcsgr; u8 refclk[REFCLK_SIZE]; }; struct stm32mp1_clk_data { const struct stm32mp1_clk_gate *gate; const struct stm32mp1_clk_sel *sel; const struct stm32mp1_clk_pll *pll; const int nb_gate; }; struct stm32mp1_clk_priv { fdt_addr_t base; const struct stm32mp1_clk_data *data; struct clk osc_clk[NB_OSC]; }; #define STM32MP1_CLK(off, b, idx, s) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 0, \ .sel = (s), \ .fixed = _UNKNOWN_ID, \ } #define STM32MP1_CLK_F(off, b, idx, f) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 0, \ .sel = _UNKNOWN_SEL, \ .fixed = (f), \ } #define STM32MP1_CLK_SET_CLR(off, b, idx, s) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 1, \ .sel = (s), \ .fixed = _UNKNOWN_ID, \ } #define STM32MP1_CLK_SET_CLR_F(off, b, idx, f) \ { \ .offset = (off), \ .bit = (b), \ .index = (idx), \ .set_clr = 1, \ .sel = _UNKNOWN_SEL, \ .fixed = (f), \ } #define STM32MP1_CLK_PARENT(idx, off, s, m, p) \ [(idx)] = { \ .offset = (off), \ .src = (s), \ .msk = (m), \ .parent = (p), \ .nb_parent = ARRAY_SIZE((p)) \ } #define STM32MP1_CLK_PLL(idx, type, off1, off2, off3, off4, off5, off6,\ p1, p2, p3, p4) \ [(idx)] = { \ .plltype = (type), \ .rckxselr = (off1), \ .pllxcfgr1 = (off2), \ .pllxcfgr2 = (off3), \ .pllxfracr = (off4), \ .pllxcr = (off5), \ .pllxcsgr = (off6), \ .refclk[0] = (p1), \ .refclk[1] = (p2), \ .refclk[2] = (p3), \ .refclk[3] = (p4), \ } static const u8 stm32mp1_clks[][2] = { {CK_PER, _CK_PER}, {CK_MPU, _CK_MPU}, {CK_AXI, _ACLK}, {CK_MCU, _CK_MCU}, {CK_HSE, _HSE}, {CK_CSI, _CSI}, {CK_LSI, _LSI}, {CK_LSE, _LSE}, {CK_HSI, _HSI}, {CK_HSE_DIV2, _HSE_KER_DIV2}, }; static const struct stm32mp1_clk_gate stm32mp1_clk_gate[] = { STM32MP1_CLK(RCC_DDRITFCR, 0, DDRC1, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 1, DDRC1LP, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 2, DDRC2, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 3, DDRC2LP, _UNKNOWN_SEL), STM32MP1_CLK_F(RCC_DDRITFCR, 4, DDRPHYC, _PLL2_R), STM32MP1_CLK(RCC_DDRITFCR, 5, DDRPHYCLP, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 6, DDRCAPB, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 7, DDRCAPBLP, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 8, AXIDCG, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 9, DDRPHYCAPB, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DDRITFCR, 10, DDRPHYCAPBLP, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 11, SPI2_K, _SPI23_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 12, SPI3_K, _SPI23_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 14, USART2_K, _UART24_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 15, USART3_K, _UART35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 16, UART4_K, _UART24_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 17, UART5_K, _UART35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 18, UART7_K, _UART78_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 19, UART8_K, _UART78_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 21, I2C1_K, _I2C12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 22, I2C2_K, _I2C12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 23, I2C3_K, _I2C35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB1ENSETR, 24, I2C5_K, _I2C35_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB2ENSETR, 8, SPI1_K, _SPI1_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB2ENSETR, 9, SPI4_K, _SPI45_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB2ENSETR, 10, SPI5_K, _SPI45_SEL), 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_APB3ENSETR, 11, SYSCFG, _UNKNOWN_SEL), 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), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 0, SPI6_K, _SPI6_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 2, I2C4_K, _I2C46_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 3, I2C6_K, _I2C46_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 4, USART1_K, _UART1_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 8, RTCAPB, _PCLK5), STM32MP1_CLK_SET_CLR(RCC_MP_APB5ENSETR, 16, BSEC, _UNKNOWN_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), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 3, GPIOD, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 4, GPIOE, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 5, GPIOF, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 6, GPIOG, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 7, GPIOH, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 8, GPIOI, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 9, GPIOJ, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB4ENSETR, 10, GPIOK, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB5ENSETR, 0, GPIOZ, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB5ENSETR, 6, RNG1_K, _UNKNOWN_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 7, ETHCK_K, _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_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), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 16, SDMMC1_K, _SDMMC12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 17, SDMMC2_K, _SDMMC12_SEL), STM32MP1_CLK_SET_CLR(RCC_MP_AHB6ENSETR, 24, USBH, _UNKNOWN_SEL), STM32MP1_CLK(RCC_DBGCFGR, 8, CK_DBG, _UNKNOWN_SEL), STM32MP1_CLK(RCC_BDCR, 20, RTC, _RTC_SEL), }; static const u8 i2c12_parents[] = {_PCLK1, _PLL4_R, _HSI_KER, _CSI_KER}; static const u8 i2c35_parents[] = {_PCLK1, _PLL4_R, _HSI_KER, _CSI_KER}; static const u8 i2c46_parents[] = {_PCLK5, _PLL3_Q, _HSI_KER, _CSI_KER}; static const u8 uart1_parents[] = {_PCLK5, _PLL3_Q, _HSI_KER, _CSI_KER, _PLL4_Q, _HSE_KER}; static const u8 uart6_parents[] = {_PCLK2, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 uart24_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 uart35_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 uart78_parents[] = {_PCLK1, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 sdmmc12_parents[] = {_HCLK6, _PLL3_R, _PLL4_P, _HSI_KER}; static const u8 sdmmc3_parents[] = {_HCLK2, _PLL3_R, _PLL4_P, _HSI_KER}; static const u8 eth_parents[] = {_PLL4_P, _PLL3_Q}; static const u8 qspi_parents[] = {_ACLK, _PLL3_R, _PLL4_P, _CK_PER}; 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}; /* same parents for SPI1=RCC_SPI2S1CKSELR and SPI2&3 = RCC_SPI2S23CKSELR */ static const u8 spi_parents[] = {_PLL4_P, _PLL3_Q, _I2S_CKIN, _CK_PER, _PLL3_R}; static const u8 spi45_parents[] = {_PCLK2, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER}; static const u8 spi6_parents[] = {_PCLK5, _PLL4_Q, _HSI_KER, _CSI_KER, _HSE_KER, _PLL3_Q}; static const u8 rtc_parents[] = {_UNKNOWN_ID, _LSE, _LSI, _HSE}; static const struct stm32mp1_clk_sel stm32mp1_clk_sel[_PARENT_SEL_NB] = { STM32MP1_CLK_PARENT(_I2C12_SEL, RCC_I2C12CKSELR, 0, 0x7, i2c12_parents), STM32MP1_CLK_PARENT(_I2C35_SEL, RCC_I2C35CKSELR, 0, 0x7, i2c35_parents), STM32MP1_CLK_PARENT(_I2C46_SEL, RCC_I2C46CKSELR, 0, 0x7, i2c46_parents), STM32MP1_CLK_PARENT(_UART6_SEL, RCC_UART6CKSELR, 0, 0x7, uart6_parents), STM32MP1_CLK_PARENT(_UART24_SEL, RCC_UART24CKSELR, 0, 0x7, uart24_parents), STM32MP1_CLK_PARENT(_UART35_SEL, RCC_UART35CKSELR, 0, 0x7, uart35_parents), STM32MP1_CLK_PARENT(_UART78_SEL, RCC_UART78CKSELR, 0, 0x7, uart78_parents), STM32MP1_CLK_PARENT(_SDMMC12_SEL, RCC_SDMMC12CKSELR, 0, 0x7, sdmmc12_parents), STM32MP1_CLK_PARENT(_SDMMC3_SEL, RCC_SDMMC3CKSELR, 0, 0x7, sdmmc3_parents), STM32MP1_CLK_PARENT(_ETH_SEL, RCC_ETHCKSELR, 0, 0x3, eth_parents), STM32MP1_CLK_PARENT(_QSPI_SEL, RCC_QSPICKSELR, 0, 0x3, qspi_parents), STM32MP1_CLK_PARENT(_FMC_SEL, RCC_FMCCKSELR, 0, 0x3, fmc_parents), 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, 0x3, adc_parents), STM32MP1_CLK_PARENT(_SPI1_SEL, RCC_SPI2S1CKSELR, 0, 0x7, spi_parents), STM32MP1_CLK_PARENT(_SPI23_SEL, RCC_SPI2S23CKSELR, 0, 0x7, spi_parents), STM32MP1_CLK_PARENT(_SPI45_SEL, RCC_SPI45CKSELR, 0, 0x7, spi45_parents), STM32MP1_CLK_PARENT(_SPI6_SEL, RCC_SPI6CKSELR, 0, 0x7, spi6_parents), STM32MP1_CLK_PARENT(_RTC_SEL, RCC_BDCR, RCC_BDCR_RTCSRC_SHIFT, (RCC_BDCR_RTCSRC_MASK >> RCC_BDCR_RTCSRC_SHIFT), rtc_parents), STM32MP1_CLK_PARENT(_UART1_SEL, RCC_UART1CKSELR, 0, 0x7, uart1_parents), }; #ifdef STM32MP1_CLOCK_TREE_INIT /* define characteristic of PLL according type */ #define DIVM_MIN 0 #define DIVM_MAX 63 #define DIVN_MIN 24 #define DIVP_MIN 0 #define DIVP_MAX 127 #define FRAC_MAX 8192 #define PLL1600_VCO_MIN 800000000 #define PLL1600_VCO_MAX 1600000000 static const struct stm32mp1_pll stm32mp1_pll[PLL_TYPE_NB] = { [PLL_800] = { .refclk_min = 4, .refclk_max = 16, .divn_max = 99, }, [PLL_1600] = { .refclk_min = 8, .refclk_max = 16, .divn_max = 199, }, }; #endif /* STM32MP1_CLOCK_TREE_INIT */ static const struct stm32mp1_clk_pll stm32mp1_clk_pll[_PLL_NB] = { STM32MP1_CLK_PLL(_PLL1, PLL_1600, RCC_RCK12SELR, RCC_PLL1CFGR1, RCC_PLL1CFGR2, RCC_PLL1FRACR, RCC_PLL1CR, RCC_PLL1CSGR, _HSI, _HSE, _UNKNOWN_ID, _UNKNOWN_ID), STM32MP1_CLK_PLL(_PLL2, PLL_1600, RCC_RCK12SELR, RCC_PLL2CFGR1, RCC_PLL2CFGR2, RCC_PLL2FRACR, RCC_PLL2CR, RCC_PLL2CSGR, _HSI, _HSE, _UNKNOWN_ID, _UNKNOWN_ID), STM32MP1_CLK_PLL(_PLL3, PLL_800, RCC_RCK3SELR, RCC_PLL3CFGR1, RCC_PLL3CFGR2, RCC_PLL3FRACR, RCC_PLL3CR, RCC_PLL3CSGR, _HSI, _HSE, _CSI, _UNKNOWN_ID), STM32MP1_CLK_PLL(_PLL4, PLL_800, RCC_RCK4SELR, RCC_PLL4CFGR1, RCC_PLL4CFGR2, RCC_PLL4FRACR, RCC_PLL4CR, RCC_PLL4CSGR, _HSI, _HSE, _CSI, _I2S_CKIN), }; /* Prescaler table lookups for clock computation */ /* div = /1 /2 /4 /8 / 16 /64 /128 /512 */ static const u8 stm32mp1_mcu_div[16] = { 0, 1, 2, 3, 4, 6, 7, 8, 9, 9, 9, 9, 9, 9, 9, 9 }; /* div = /1 /2 /4 /8 /16 : same divider for pmu and apbx*/ #define stm32mp1_mpu_div stm32mp1_mpu_apbx_div #define stm32mp1_apbx_div stm32mp1_mpu_apbx_div static const u8 stm32mp1_mpu_apbx_div[8] = { 0, 1, 2, 3, 4, 4, 4, 4 }; /* div = /1 /2 /3 /4 */ static const u8 stm32mp1_axi_div[8] = { 1, 2, 3, 4, 4, 4, 4, 4 }; static const __maybe_unused char * const stm32mp1_clk_parent_name[_PARENT_NB] = { [_HSI] = "HSI", [_HSE] = "HSE", [_CSI] = "CSI", [_LSI] = "LSI", [_LSE] = "LSE", [_I2S_CKIN] = "I2S_CKIN", [_HSI_KER] = "HSI_KER", [_HSE_KER] = "HSE_KER", [_HSE_KER_DIV2] = "HSE_KER_DIV2", [_CSI_KER] = "CSI_KER", [_PLL1_P] = "PLL1_P", [_PLL1_Q] = "PLL1_Q", [_PLL1_R] = "PLL1_R", [_PLL2_P] = "PLL2_P", [_PLL2_Q] = "PLL2_Q", [_PLL2_R] = "PLL2_R", [_PLL3_P] = "PLL3_P", [_PLL3_Q] = "PLL3_Q", [_PLL3_R] = "PLL3_R", [_PLL4_P] = "PLL4_P", [_PLL4_Q] = "PLL4_Q", [_PLL4_R] = "PLL4_R", [_ACLK] = "ACLK", [_PCLK1] = "PCLK1", [_PCLK2] = "PCLK2", [_PCLK3] = "PCLK3", [_PCLK4] = "PCLK4", [_PCLK5] = "PCLK5", [_HCLK6] = "KCLK6", [_HCLK2] = "HCLK2", [_CK_PER] = "CK_PER", [_CK_MPU] = "CK_MPU", [_CK_MCU] = "CK_MCU", [_USB_PHY_48] = "USB_PHY_48", [_DSI_PHY] = "DSI_PHY_PLL", }; static const __maybe_unused char * const stm32mp1_clk_parent_sel_name[_PARENT_SEL_NB] = { [_I2C12_SEL] = "I2C12", [_I2C35_SEL] = "I2C35", [_I2C46_SEL] = "I2C46", [_UART6_SEL] = "UART6", [_UART24_SEL] = "UART24", [_UART35_SEL] = "UART35", [_UART78_SEL] = "UART78", [_SDMMC12_SEL] = "SDMMC12", [_SDMMC3_SEL] = "SDMMC3", [_ETH_SEL] = "ETH", [_QSPI_SEL] = "QSPI", [_FMC_SEL] = "FMC", [_USBPHY_SEL] = "USBPHY", [_USBO_SEL] = "USBO", [_STGEN_SEL] = "STGEN", [_DSI_SEL] = "DSI", [_ADC12_SEL] = "ADC12", [_SPI1_SEL] = "SPI1", [_SPI45_SEL] = "SPI45", [_RTC_SEL] = "RTC", [_UART1_SEL] = "UART1", }; static const struct stm32mp1_clk_data stm32mp1_data = { .gate = stm32mp1_clk_gate, .sel = stm32mp1_clk_sel, .pll = stm32mp1_clk_pll, .nb_gate = ARRAY_SIZE(stm32mp1_clk_gate), }; static ulong stm32mp1_clk_get_fixed(struct stm32mp1_clk_priv *priv, int idx) { if (idx >= NB_OSC) { log_debug("clk id %d not found\n", idx); return 0; } return clk_get_rate(&priv->osc_clk[idx]); } static int stm32mp1_clk_get_id(struct stm32mp1_clk_priv *priv, unsigned long id) { const struct stm32mp1_clk_gate *gate = priv->data->gate; int i, nb_clks = priv->data->nb_gate; for (i = 0; i < nb_clks; i++) { if (gate[i].index == id) break; } if (i == nb_clks) { log_err("clk id %d not found\n", (u32)id); return -EINVAL; } return i; } static int stm32mp1_clk_get_sel(struct stm32mp1_clk_priv *priv, int i) { const struct stm32mp1_clk_gate *gate = priv->data->gate; if (gate[i].sel > _PARENT_SEL_NB) { log_err("parents for clk id %d not found\n", i); return -EINVAL; } return gate[i].sel; } static int stm32mp1_clk_get_fixed_parent(struct stm32mp1_clk_priv *priv, int i) { const struct stm32mp1_clk_gate *gate = priv->data->gate; if (gate[i].fixed == _UNKNOWN_ID) return -ENOENT; return gate[i].fixed; } static int stm32mp1_clk_get_parent(struct stm32mp1_clk_priv *priv, unsigned long id) { const struct stm32mp1_clk_sel *sel = priv->data->sel; int i; int s, p; unsigned int idx; for (idx = 0; idx < ARRAY_SIZE(stm32mp1_clks); idx++) if (stm32mp1_clks[idx][0] == id) return stm32mp1_clks[idx][1]; i = stm32mp1_clk_get_id(priv, id); if (i < 0) return i; p = stm32mp1_clk_get_fixed_parent(priv, i); if (p >= 0 && p < _PARENT_NB) return p; s = stm32mp1_clk_get_sel(priv, i); if (s < 0) return s; p = (readl(priv->base + sel[s].offset) >> sel[s].src) & sel[s].msk; if (p < sel[s].nb_parent) { log_content("%s clock is the parent %s of clk id %d\n", stm32mp1_clk_parent_name[sel[s].parent[p]], stm32mp1_clk_parent_sel_name[s], (u32)id); return sel[s].parent[p]; } /* clock is DISABLED when the clock src is not in clk_parent[] range */ log_debug("no parents defined for clk id %d\n", (u32)id); return -EINVAL; } static ulong pll_get_fref_ck(struct stm32mp1_clk_priv *priv, int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; 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]); 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); fracr = readl(priv->base + pll[pll_id].pllxfracr); divm = (cfgr1 & (RCC_PLLNCFGR1_DIVM_MASK)) >> RCC_PLLNCFGR1_DIVM_SHIFT; divn = cfgr1 & RCC_PLLNCFGR1_DIVN_MASK; refclk = pll_get_fref_ck(priv, pll_id); /* with FRACV : * Fvco = Fck_ref * ((DIVN + 1) + FRACV / 2^13) / (DIVM + 1) * without FRACV * Fvco = Fck_ref * ((DIVN + 1) / (DIVM + 1) */ if (fracr & RCC_PLLNFRACR_FRACLE) { u32 fracv = (fracr & RCC_PLLNFRACR_FRACV_MASK) >> RCC_PLLNFRACR_FRACV_SHIFT; fvco = (ulong)lldiv((unsigned long long)refclk * (((divn + 1) << 13) + fracv), ((unsigned long long)(divm + 1)) << 13); } else { fvco = (ulong)(refclk * (divn + 1) / (divm + 1)); } 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; 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; dfout = pll_get_fvco(priv, pll_id) / (divy + 1); return dfout; } static ulong stm32mp1_clk_get_by_name(const char *name) { struct clk clk; struct udevice *dev = NULL; ulong clock = 0; if (!uclass_get_device_by_name(UCLASS_CLK, name, &dev)) { if (clk_request(dev, &clk)) { log_err("%s request", name); } else { clk.id = 0; clock = clk_get_rate(&clk); } } return clock; } static ulong stm32mp1_clk_get(struct stm32mp1_clk_priv *priv, int p) { u32 reg; ulong clock = 0; switch (p) { case _CK_MPU: /* MPU sub system */ reg = readl(priv->base + RCC_MPCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_MPCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_MPCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_MPCKSELR_PLL: case RCC_MPCKSELR_PLL_MPUDIV: clock = stm32mp1_read_pll_freq(priv, _PLL1, _DIV_P); if ((reg & RCC_SELR_SRC_MASK) == RCC_MPCKSELR_PLL_MPUDIV) { reg = readl(priv->base + RCC_MPCKDIVR); clock >>= stm32mp1_mpu_div[reg & RCC_MPUDIV_MASK]; } break; } break; /* AXI sub system */ case _ACLK: case _HCLK2: case _HCLK6: case _PCLK4: case _PCLK5: reg = readl(priv->base + RCC_ASSCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_ASSCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_ASSCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_ASSCKSELR_PLL: clock = stm32mp1_read_pll_freq(priv, _PLL2, _DIV_P); break; } /* System clock divider */ reg = readl(priv->base + RCC_AXIDIVR); clock /= stm32mp1_axi_div[reg & RCC_AXIDIV_MASK]; switch (p) { case _PCLK4: reg = readl(priv->base + RCC_APB4DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _PCLK5: reg = readl(priv->base + RCC_APB5DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; default: break; } break; /* MCU sub system */ case _CK_MCU: case _PCLK1: case _PCLK2: case _PCLK3: reg = readl(priv->base + RCC_MSSCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_MSSCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_MSSCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_MSSCKSELR_CSI: clock = stm32mp1_clk_get_fixed(priv, _CSI); break; case RCC_MSSCKSELR_PLL: clock = stm32mp1_read_pll_freq(priv, _PLL3, _DIV_P); break; } /* MCU clock divider */ reg = readl(priv->base + RCC_MCUDIVR); clock >>= stm32mp1_mcu_div[reg & RCC_MCUDIV_MASK]; switch (p) { case _PCLK1: reg = readl(priv->base + RCC_APB1DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _PCLK2: reg = readl(priv->base + RCC_APB2DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _PCLK3: reg = readl(priv->base + RCC_APB3DIVR); clock >>= stm32mp1_apbx_div[reg & RCC_APBXDIV_MASK]; break; case _CK_MCU: default: break; } break; case _CK_PER: reg = readl(priv->base + RCC_CPERCKSELR); switch (reg & RCC_SELR_SRC_MASK) { case RCC_CPERCKSELR_HSI: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case RCC_CPERCKSELR_HSE: clock = stm32mp1_clk_get_fixed(priv, _HSE); break; case RCC_CPERCKSELR_CSI: clock = stm32mp1_clk_get_fixed(priv, _CSI); break; } break; case _HSI: case _HSI_KER: clock = stm32mp1_clk_get_fixed(priv, _HSI); break; case _CSI: case _CSI_KER: clock = stm32mp1_clk_get_fixed(priv, _CSI); break; case _HSE: case _HSE_KER: case _HSE_KER_DIV2: clock = stm32mp1_clk_get_fixed(priv, _HSE); if (p == _HSE_KER_DIV2) clock >>= 1; break; case _LSI: clock = stm32mp1_clk_get_fixed(priv, _LSI); break; case _LSE: clock = stm32mp1_clk_get_fixed(priv, _LSE); break; /* PLL */ case _PLL1_P: case _PLL1_Q: case _PLL1_R: clock = stm32mp1_read_pll_freq(priv, _PLL1, p - _PLL1_P); break; case _PLL2_P: case _PLL2_Q: case _PLL2_R: clock = stm32mp1_read_pll_freq(priv, _PLL2, p - _PLL2_P); break; case _PLL3_P: case _PLL3_Q: case _PLL3_R: clock = stm32mp1_read_pll_freq(priv, _PLL3, p - _PLL3_P); break; case _PLL4_P: case _PLL4_Q: case _PLL4_R: clock = stm32mp1_read_pll_freq(priv, _PLL4, p - _PLL4_P); break; /* other */ case _USB_PHY_48: clock = stm32mp1_clk_get_by_name("ck_usbo_48m"); break; case _DSI_PHY: clock = stm32mp1_clk_get_by_name("ck_dsi_phy"); break; default: break; } log_debug("id=%d clock = %lx : %ld kHz\n", p, clock, clock / 1000); return clock; } static int stm32mp1_clk_enable(struct clk *clk) { struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); const struct stm32mp1_clk_gate *gate = priv->data->gate; int i = stm32mp1_clk_get_id(priv, clk->id); if (i < 0) return i; if (gate[i].set_clr) writel(BIT(gate[i].bit), priv->base + gate[i].offset); else setbits_le32(priv->base + gate[i].offset, BIT(gate[i].bit)); dev_dbg(clk->dev, "%s: id clock %d has been enabled\n", __func__, (u32)clk->id); return 0; } static int stm32mp1_clk_disable(struct clk *clk) { struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); const struct stm32mp1_clk_gate *gate = priv->data->gate; int i = stm32mp1_clk_get_id(priv, clk->id); if (i < 0) return i; if (gate[i].set_clr) writel(BIT(gate[i].bit), priv->base + gate[i].offset + RCC_MP_ENCLRR_OFFSET); else clrbits_le32(priv->base + gate[i].offset, BIT(gate[i].bit)); dev_dbg(clk->dev, "%s: id clock %d has been disabled\n", __func__, (u32)clk->id); return 0; } static ulong stm32mp1_clk_get_rate(struct clk *clk) { struct stm32mp1_clk_priv *priv = dev_get_priv(clk->dev); int p = stm32mp1_clk_get_parent(priv, clk->id); ulong rate; if (p < 0) return 0; rate = stm32mp1_clk_get(priv, p); dev_vdbg(clk->dev, "computed rate for id clock %d is %d (parent is %s)\n", (u32)clk->id, (u32)rate, stm32mp1_clk_parent_name[p]); return rate; } #ifdef STM32MP1_CLOCK_TREE_INIT bool stm32mp1_supports_opp(u32 opp_id, u32 cpu_type) { unsigned int id; switch (opp_id) { case 1: case 2: id = opp_id; break; default: id = 1; /* default value */ break; } switch (cpu_type) { case CPU_STM32MP157Fxx: case CPU_STM32MP157Dxx: case CPU_STM32MP153Fxx: case CPU_STM32MP153Dxx: case CPU_STM32MP151Fxx: case CPU_STM32MP151Dxx: return true; default: return id == 1; } } __weak void board_vddcore_init(u32 voltage_mv) { } /* * gets OPP parameters (frequency in KHz and voltage in mV) from * an OPP table subnode. Platform HW support capabilities are also checked. * Returns 0 on success and a negative FDT error code on failure. */ static int stm32mp1_get_opp(u32 cpu_type, ofnode subnode, u32 *freq_khz, u32 *voltage_mv) { u32 opp_hw; u64 read_freq_64; u32 read_voltage_32; *freq_khz = 0; *voltage_mv = 0; opp_hw = ofnode_read_u32_default(subnode, "opp-supported-hw", 0); if (opp_hw) if (!stm32mp1_supports_opp(opp_hw, cpu_type)) return -FDT_ERR_BADVALUE; read_freq_64 = ofnode_read_u64_default(subnode, "opp-hz", 0) / 1000ULL; read_voltage_32 = ofnode_read_u32_default(subnode, "opp-microvolt", 0) / 1000U; if (!read_voltage_32 || !read_freq_64) return -FDT_ERR_NOTFOUND; /* Frequency value expressed in KHz must fit on 32 bits */ if (read_freq_64 > U32_MAX) return -FDT_ERR_BADVALUE; /* Millivolt value must fit on 16 bits */ if (read_voltage_32 > U16_MAX) return -FDT_ERR_BADVALUE; *freq_khz = (u32)read_freq_64; *voltage_mv = read_voltage_32; return 0; } /* * parses OPP table in DT and finds the parameters for the * highest frequency supported by the HW platform. * Returns 0 on success and a negative FDT error code on failure. */ int stm32mp1_get_max_opp_freq(struct stm32mp1_clk_priv *priv, u64 *freq_hz) { ofnode node, subnode; int ret; u32 freq = 0U, voltage = 0U; u32 cpu_type = get_cpu_type(); node = ofnode_by_compatible(ofnode_null(), "operating-points-v2"); if (!ofnode_valid(node)) return -FDT_ERR_NOTFOUND; ofnode_for_each_subnode(subnode, node) { unsigned int read_freq; unsigned int read_voltage; ret = stm32mp1_get_opp(cpu_type, subnode, &read_freq, &read_voltage); if (ret) continue; if (read_freq > freq) { freq = read_freq; voltage = read_voltage; } } if (!freq || !voltage) return -FDT_ERR_NOTFOUND; *freq_hz = (u64)1000U * freq; board_vddcore_init(voltage); return 0; } static int stm32mp1_pll1_opp(struct stm32mp1_clk_priv *priv, int clksrc, u32 *pllcfg, u32 *fracv) { u32 post_divm; u32 input_freq; u64 output_freq; u64 freq; u64 vco; u32 divm, divn, divp, frac; int i, ret; u32 diff; u32 best_diff = U32_MAX; /* PLL1 is 1600 */ const u32 DIVN_MAX = stm32mp1_pll[PLL_1600].divn_max; const u32 POST_DIVM_MIN = stm32mp1_pll[PLL_1600].refclk_min * 1000000U; const u32 POST_DIVM_MAX = stm32mp1_pll[PLL_1600].refclk_max * 1000000U; ret = stm32mp1_get_max_opp_freq(priv, &output_freq); if (ret) { log_debug("PLL1 OPP configuration not found (%d).\n", ret); return ret; } switch (clksrc) { case CLK_PLL12_HSI: input_freq = stm32mp1_clk_get_fixed(priv, _HSI); break; case CLK_PLL12_HSE: input_freq = stm32mp1_clk_get_fixed(priv, _HSE); break; default: return -EINTR; } /* Following parameters have always the same value */ pllcfg[PLLCFG_Q] = 0; pllcfg[PLLCFG_R] = 0; pllcfg[PLLCFG_O] = PQR(1, 0, 0); for (divm = DIVM_MAX; divm >= DIVM_MIN; divm--) { post_divm = (u32)(input_freq / (divm + 1)); if (post_divm < POST_DIVM_MIN || post_divm > POST_DIVM_MAX) continue; for (divp = DIVP_MIN; divp <= DIVP_MAX; divp++) { freq = output_freq * (divm + 1) * (divp + 1); divn = (u32)((freq / input_freq) - 1); if (divn < DIVN_MIN || divn > DIVN_MAX) continue; frac = (u32)(((freq * FRAC_MAX) / input_freq) - ((divn + 1) * FRAC_MAX)); /* 2 loops to refine the fractional part */ for (i = 2; i != 0; i--) { if (frac > FRAC_MAX) break; vco = (post_divm * (divn + 1)) + ((post_divm * (u64)frac) / FRAC_MAX); if (vco < (PLL1600_VCO_MIN / 2) || vco > (PLL1600_VCO_MAX / 2)) { frac++; continue; } freq = vco / (divp + 1); if (output_freq < freq) diff = (u32)(freq - output_freq); else diff = (u32)(output_freq - freq); if (diff < best_diff) { pllcfg[PLLCFG_M] = divm; pllcfg[PLLCFG_N] = divn; pllcfg[PLLCFG_P] = divp; *fracv = frac; if (diff == 0) return 0; best_diff = diff; } frac++; } } } if (best_diff == U32_MAX) return -1; return 0; } static void stm32mp1_ls_osc_set(int enable, fdt_addr_t rcc, u32 offset, u32 mask_on) { u32 address = rcc + offset; if (enable) setbits_le32(address, mask_on); else clrbits_le32(address, mask_on); } static void stm32mp1_hs_ocs_set(int enable, fdt_addr_t rcc, u32 mask_on) { writel(mask_on, rcc + (enable ? RCC_OCENSETR : RCC_OCENCLRR)); } static int stm32mp1_osc_wait(int enable, fdt_addr_t rcc, u32 offset, u32 mask_rdy) { u32 mask_test = 0; u32 address = rcc + offset; u32 val; int ret; if (enable) mask_test = mask_rdy; ret = readl_poll_timeout(address, val, (val & mask_rdy) == mask_test, TIMEOUT_1S); if (ret) log_err("OSC %x @ %x timeout for enable=%d : 0x%x\n", mask_rdy, address, enable, readl(address)); return ret; } static void stm32mp1_lse_enable(fdt_addr_t rcc, int bypass, int digbyp, u32 lsedrv) { u32 value; if (digbyp) setbits_le32(rcc + RCC_BDCR, RCC_BDCR_DIGBYP); if (bypass || digbyp) setbits_le32(rcc + RCC_BDCR, RCC_BDCR_LSEBYP); /* * warning: not recommended to switch directly from "high drive" * to "medium low drive", and vice-versa. */ value = (readl(rcc + RCC_BDCR) & RCC_BDCR_LSEDRV_MASK) >> RCC_BDCR_LSEDRV_SHIFT; while (value != lsedrv) { if (value > lsedrv) value--; else value++; clrsetbits_le32(rcc + RCC_BDCR, RCC_BDCR_LSEDRV_MASK, value << RCC_BDCR_LSEDRV_SHIFT); } stm32mp1_ls_osc_set(1, rcc, RCC_BDCR, RCC_BDCR_LSEON); } static void stm32mp1_lse_wait(fdt_addr_t rcc) { stm32mp1_osc_wait(1, rcc, RCC_BDCR, RCC_BDCR_LSERDY); } static void stm32mp1_lsi_set(fdt_addr_t rcc, int enable) { stm32mp1_ls_osc_set(enable, rcc, RCC_RDLSICR, RCC_RDLSICR_LSION); stm32mp1_osc_wait(enable, rcc, RCC_RDLSICR, RCC_RDLSICR_LSIRDY); } static void stm32mp1_hse_enable(fdt_addr_t rcc, int bypass, int digbyp, int css) { 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) writel(RCC_OCENR_HSECSSON, rcc + RCC_OCENSETR); } static void stm32mp1_csi_set(fdt_addr_t rcc, int enable) { stm32mp1_hs_ocs_set(enable, rcc, RCC_OCENR_CSION); stm32mp1_osc_wait(enable, rcc, RCC_OCRDYR, RCC_OCRDYR_CSIRDY); } static void stm32mp1_hsi_set(fdt_addr_t rcc, int enable) { stm32mp1_hs_ocs_set(enable, rcc, RCC_OCENR_HSION); stm32mp1_osc_wait(enable, rcc, RCC_OCRDYR, RCC_OCRDYR_HSIRDY); } static int stm32mp1_set_hsidiv(fdt_addr_t rcc, u8 hsidiv) { u32 address = rcc + RCC_OCRDYR; u32 val; int ret; clrsetbits_le32(rcc + RCC_HSICFGR, RCC_HSICFGR_HSIDIV_MASK, RCC_HSICFGR_HSIDIV_MASK & hsidiv); ret = readl_poll_timeout(address, val, val & RCC_OCRDYR_HSIDIVRDY, TIMEOUT_200MS); if (ret) log_err("HSIDIV failed @ 0x%x: 0x%x\n", address, readl(address)); return ret; } static int stm32mp1_hsidiv(fdt_addr_t rcc, ulong hsifreq) { u8 hsidiv; u32 hsidivfreq = MAX_HSI_HZ; for (hsidiv = 0; hsidiv < 4; hsidiv++, hsidivfreq = hsidivfreq / 2) if (hsidivfreq == hsifreq) break; if (hsidiv == 4) { log_err("hsi frequency invalid"); return -1; } if (hsidiv > 0) return stm32mp1_set_hsidiv(rcc, hsidiv); return 0; } static void pll_start(struct stm32mp1_clk_priv *priv, int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; 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) { const struct stm32mp1_clk_pll *pll = priv->data->pll; u32 pllxcr = priv->base + pll[pll_id].pllxcr; u32 val; int ret; ret = readl_poll_timeout(pllxcr, val, val & RCC_PLLNCR_PLLRDY, TIMEOUT_200MS); if (ret) { log_err("PLL%d start failed @ 0x%x: 0x%x\n", pll_id, pllxcr, readl(pllxcr)); return ret; } /* start the requested output */ setbits_le32(pllxcr, output << RCC_PLLNCR_DIVEN_SHIFT); return 0; } static int pll_stop(struct stm32mp1_clk_priv *priv, int pll_id) { const struct stm32mp1_clk_pll *pll = priv->data->pll; u32 pllxcr = priv->base + pll[pll_id].pllxcr; u32 val; /* stop all output */ clrbits_le32(pllxcr, RCC_PLLNCR_DIVPEN | RCC_PLLNCR_DIVQEN | RCC_PLLNCR_DIVREN); /* stop PLL */ clrbits_le32(pllxcr, RCC_PLLNCR_PLLON); /* wait PLL stopped */ return readl_poll_timeout(pllxcr, val, (val & RCC_PLLNCR_PLLRDY) == 0, TIMEOUT_200MS); } static void pll_config_output(struct stm32mp1_clk_priv *priv, int pll_id, u32 *pllcfg) { const struct stm32mp1_clk_pll *pll = priv->data->pll; fdt_addr_t rcc = priv->base; u32 value; value = (pllcfg[PLLCFG_P] << RCC_PLLNCFGR2_DIVP_SHIFT) & RCC_PLLNCFGR2_DIVP_MASK; value |= (pllcfg[PLLCFG_Q] << RCC_PLLNCFGR2_DIVQ_SHIFT) & RCC_PLLNCFGR2_DIVQ_MASK; value |= (pllcfg[PLLCFG_R] << RCC_PLLNCFGR2_DIVR_SHIFT) & RCC_PLLNCFGR2_DIVR_MASK; writel(value, rcc + pll[pll_id].pllxcfgr2); } static int pll_config(struct stm32mp1_clk_priv *priv, int pll_id, u32 *pllcfg, u32 fracv) { const struct stm32mp1_clk_pll *pll = priv->data->pll; fdt_addr_t rcc = priv->base; enum stm32mp1_plltype type = pll[pll_id].plltype; int src; ulong refclk; u8 ifrge = 0; u32 value; src = readl(priv->base + pll[pll_id].rckxselr) & RCC_SELR_SRC_MASK; refclk = stm32mp1_clk_get_fixed(priv, pll[pll_id].refclk[src]) / (pllcfg[PLLCFG_M] + 1); if (refclk < (stm32mp1_pll[type].refclk_min * 1000000) || refclk > (stm32mp1_pll[type].refclk_max * 1000000)) { log_err("invalid refclk = %x\n", (u32)refclk); return -EINVAL; } if (type == PLL_800 && refclk >= 8000000) ifrge = 1; value = (pllcfg[PLLCFG_N] << RCC_PLLNCFGR1_DIVN_SHIFT) & RCC_PLLNCFGR1_DIVN_MASK; value |= (pllcfg[PLLCFG_M] << RCC_PLLNCFGR1_DIVM_SHIFT) & RCC_PLLNCFGR1_DIVM_MASK; value |= (ifrge << RCC_PLLNCFGR1_IFRGE_SHIFT) & RCC_PLLNCFGR1_IFRGE_MASK; writel(value, rcc + pll[pll_id].pllxcfgr1); /* fractional configuration: load sigma-delta modulator (SDM) */ /* Write into FRACV the new fractional value , and FRACLE to 0 */ writel(fracv << RCC_PLLNFRACR_FRACV_SHIFT, rcc + pll[pll_id].pllxfracr); /* Write FRACLE to 1 : FRACV value is loaded into the SDM */ setbits_le32(rcc + pll[pll_id].pllxfracr, RCC_PLLNFRACR_FRACLE); pll_config_output(priv, pll_id, pllcfg); return 0; } static void pll_csg(struct stm32mp1_clk_priv *priv, int pll_id, u32 *csg) { const struct stm32mp1_clk_pll *pll = priv->data->pll; u32 pllxcsg; pllxcsg = ((csg[PLLCSG_MOD_PER] << RCC_PLLNCSGR_MOD_PER_SHIFT) & RCC_PLLNCSGR_MOD_PER_MASK) | ((csg[PLLCSG_INC_STEP] << RCC_PLLNCSGR_INC_STEP_SHIFT) & RCC_PLLNCSGR_INC_STEP_MASK) | ((csg[PLLCSG_SSCG_MODE] << RCC_PLLNCSGR_SSCG_MODE_SHIFT) & 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 __maybe_unused int pll_set_rate(struct udevice *dev, int pll_id, int div_id, unsigned long clk_rate) { struct stm32mp1_clk_priv *priv = dev_get_priv(dev); unsigned int pllcfg[PLLCFG_NB]; ofnode plloff; char name[12]; const struct stm32mp1_clk_pll *pll = priv->data->pll; enum stm32mp1_plltype type = pll[pll_id].plltype; int divm, divn, divy; int ret; ulong fck_ref; u32 fracv; u64 value; if (div_id > _DIV_NB) return -EINVAL; sprintf(name, "st,pll@%d", pll_id); plloff = dev_read_subnode(dev, name); if (!ofnode_valid(plloff)) return -FDT_ERR_NOTFOUND; ret = ofnode_read_u32_array(plloff, "cfg", pllcfg, PLLCFG_NB); if (ret < 0) return -FDT_ERR_NOTFOUND; fck_ref = pll_get_fref_ck(priv, pll_id); divm = pllcfg[PLLCFG_M]; /* select output divider = 0: for _DIV_P, 1:_DIV_Q 2:_DIV_R */ divy = pllcfg[PLLCFG_P + div_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) * / (DIVy + 1) * (DIVM + 1) * value = (DIVN + 1) * 2^13 + FRACV / 2^13 * = Fck_pll_y (DIVy + 1) * (DIVM + 1) * 2^13 / Fck_ref */ value = ((u64)clk_rate * (divy + 1) * (divm + 1)) << 13; value = lldiv(value, fck_ref); divn = (value >> 13) - 1; if (divn < DIVN_MIN || divn > stm32mp1_pll[type].divn_max) { dev_err(dev, "divn invalid = %d", divn); return -EINVAL; } fracv = value - ((divn + 1) << 13); pllcfg[PLLCFG_N] = divn; /* reconfigure PLL */ pll_stop(priv, pll_id); pll_config(priv, pll_id, pllcfg, fracv); pll_start(priv, pll_id); pll_output(priv, pll_id, pllcfg[PLLCFG_O]); return 0; } static int set_clksrc(struct stm32mp1_clk_priv *priv, unsigned int clksrc) { u32 address = priv->base + (clksrc >> 4); u32 val; int ret; clrsetbits_le32(address, RCC_SELR_SRC_MASK, clksrc & RCC_SELR_SRC_MASK); ret = readl_poll_timeout(address, val, val & RCC_SELR_SRCRDY, TIMEOUT_200MS); if (ret) log_err("CLKSRC %x start failed @ 0x%x: 0x%x\n", clksrc, address, readl(address)); return ret; } static void stgen_config(struct stm32mp1_clk_priv *priv) { int p; u32 stgenc, cntfid0; ulong rate; stgenc = STM32_STGEN_BASE; cntfid0 = readl(stgenc + STGENC_CNTFID0); p = stm32mp1_clk_get_parent(priv, STGEN_K); rate = stm32mp1_clk_get(priv, p); if (cntfid0 != rate) { u64 counter; log_debug("System Generic Counter (STGEN) update\n"); clrbits_le32(stgenc + STGENC_CNTCR, STGENC_CNTCR_EN); 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); __asm__ volatile("mcr p15, 0, %0, c14, c0, 0" : : "r" (rate)); /* need to update gd->arch.timer_rate_hz with new frequency */ timer_init(); } } static int set_clkdiv(unsigned int clkdiv, u32 address) { u32 val; int ret; clrsetbits_le32(address, RCC_DIVR_DIV_MASK, clkdiv & RCC_DIVR_DIV_MASK); ret = readl_poll_timeout(address, val, val & RCC_DIVR_DIVRDY, TIMEOUT_200MS); if (ret) log_err("CLKDIV %x start failed @ 0x%x: 0x%x\n", clkdiv, address, readl(address)); return ret; } static void stm32mp1_mco_csg(struct stm32mp1_clk_priv *priv, u32 clksrc, u32 clkdiv) { u32 address = priv->base + (clksrc >> 4); /* * binding clksrc : bit15-4 offset * bit3: disable * bit2-0: MCOSEL[2:0] */ if (clksrc & 0x8) { clrbits_le32(address, RCC_MCOCFG_MCOON); } else { clrsetbits_le32(address, RCC_MCOCFG_MCOSRC_MASK, clksrc & RCC_MCOCFG_MCOSRC_MASK); clrsetbits_le32(address, RCC_MCOCFG_MCODIV_MASK, clkdiv << RCC_MCOCFG_MCODIV_SHIFT); setbits_le32(address, RCC_MCOCFG_MCOON); } } static void set_rtcsrc(struct stm32mp1_clk_priv *priv, unsigned int clksrc, int lse_css) { u32 address = priv->base + RCC_BDCR; if (readl(address) & RCC_BDCR_RTCCKEN) goto skip_rtc; if (clksrc == CLK_RTC_DISABLED) goto skip_rtc; clrsetbits_le32(address, RCC_BDCR_RTCSRC_MASK, clksrc << RCC_BDCR_RTCSRC_SHIFT); setbits_le32(address, RCC_BDCR_RTCCKEN); skip_rtc: if (lse_css) setbits_le32(address, RCC_BDCR_LSECSSON); } static void pkcs_config(struct stm32mp1_clk_priv *priv, u32 pkcs) { u32 address = priv->base + ((pkcs >> 4) & 0xFFF); u32 value = pkcs & 0xF; u32 mask = 0xF; if (pkcs & BIT(31)) { mask <<= 4; value <<= 4; } clrsetbits_le32(address, mask, value); } static int stm32mp1_clktree(struct udevice *dev) { struct stm32mp1_clk_priv *priv = dev_get_priv(dev); fdt_addr_t rcc = priv->base; unsigned int clksrc[CLKSRC_NB]; unsigned int clkdiv[CLKDIV_NB]; unsigned int pllcfg[_PLL_NB][PLLCFG_NB]; unsigned int pllfracv[_PLL_NB]; unsigned int pllcsg[_PLL_NB][PLLCSG_NB]; bool pllcfg_valid[_PLL_NB]; bool pllcsg_set[_PLL_NB]; int ret; int i, len; int lse_css = 0; const u32 *pkcs_cell; /* check mandatory field */ ret = dev_read_u32_array(dev, "st,clksrc", clksrc, CLKSRC_NB); if (ret < 0) { dev_dbg(dev, "field st,clksrc invalid: error %d\n", ret); return -FDT_ERR_NOTFOUND; } ret = dev_read_u32_array(dev, "st,clkdiv", clkdiv, CLKDIV_NB); if (ret < 0) { dev_dbg(dev, "field st,clkdiv invalid: error %d\n", ret); return -FDT_ERR_NOTFOUND; } /* check mandatory field in each pll */ for (i = 0; i < _PLL_NB; i++) { char name[12]; ofnode node; sprintf(name, "st,pll@%d", i); node = dev_read_subnode(dev, name); pllcfg_valid[i] = ofnode_valid(node); pllcsg_set[i] = false; if (pllcfg_valid[i]) { dev_dbg(dev, "DT for PLL %d @ %s\n", i, name); ret = ofnode_read_u32_array(node, "cfg", pllcfg[i], PLLCFG_NB); if (ret < 0) { dev_dbg(dev, "field cfg invalid: error %d\n", ret); return -FDT_ERR_NOTFOUND; } pllfracv[i] = ofnode_read_u32_default(node, "frac", 0); ret = ofnode_read_u32_array(node, "csg", pllcsg[i], PLLCSG_NB); if (!ret) { pllcsg_set[i] = true; } else if (ret != -FDT_ERR_NOTFOUND) { dev_dbg(dev, "invalid csg node for pll@%d res=%d\n", i, ret); return ret; } } else if (i == _PLL1) { /* use OPP for PLL1 for A7 CPU */ dev_dbg(dev, "DT for PLL %d with OPP\n", i); ret = stm32mp1_pll1_opp(priv, clksrc[CLKSRC_PLL12], pllcfg[i], &pllfracv[i]); if (ret) { dev_dbg(dev, "PLL %d with OPP error = %d\n", i, ret); return ret; } pllcfg_valid[i] = true; } } dev_dbg(dev, "configuration MCO\n"); stm32mp1_mco_csg(priv, clksrc[CLKSRC_MCO1], clkdiv[CLKDIV_MCO1]); stm32mp1_mco_csg(priv, clksrc[CLKSRC_MCO2], clkdiv[CLKDIV_MCO2]); dev_dbg(dev, "switch ON osillator\n"); /* * switch ON oscillator found in device-tree, * HSI already ON after bootrom */ if (clk_valid(&priv->osc_clk[_LSI])) stm32mp1_lsi_set(rcc, 1); if (clk_valid(&priv->osc_clk[_LSE])) { int bypass, digbyp; u32 lsedrv; struct udevice *dev = priv->osc_clk[_LSE].dev; 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, digbyp, lsedrv); } if (clk_valid(&priv->osc_clk[_HSE])) { int bypass, digbyp, css; struct udevice *dev = priv->osc_clk[_HSE].dev; 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, digbyp, css); } /* CSI is mandatory for automatic I/O compensation (SYSCFG_CMPCR) * => switch on CSI even if node is not present in device tree */ stm32mp1_csi_set(rcc, 1); /* come back to HSI */ dev_dbg(dev, "come back to HSI\n"); set_clksrc(priv, CLK_MPU_HSI); set_clksrc(priv, CLK_AXI_HSI); set_clksrc(priv, CLK_MCU_HSI); dev_dbg(dev, "pll stop\n"); for (i = 0; i < _PLL_NB; i++) pll_stop(priv, i); /* configure HSIDIV */ dev_dbg(dev, "configure HSIDIV\n"); if (clk_valid(&priv->osc_clk[_HSI])) { stm32mp1_hsidiv(rcc, clk_get_rate(&priv->osc_clk[_HSI])); stgen_config(priv); } /* select DIV */ dev_dbg(dev, "select DIV\n"); /* no ready bit when MPUSRC != CLK_MPU_PLL1P_DIV, MPUDIV is disabled */ writel(clkdiv[CLKDIV_MPU] & RCC_DIVR_DIV_MASK, rcc + RCC_MPCKDIVR); set_clkdiv(clkdiv[CLKDIV_AXI], rcc + RCC_AXIDIVR); set_clkdiv(clkdiv[CLKDIV_APB4], rcc + RCC_APB4DIVR); set_clkdiv(clkdiv[CLKDIV_APB5], rcc + RCC_APB5DIVR); set_clkdiv(clkdiv[CLKDIV_MCU], rcc + RCC_MCUDIVR); set_clkdiv(clkdiv[CLKDIV_APB1], rcc + RCC_APB1DIVR); set_clkdiv(clkdiv[CLKDIV_APB2], rcc + RCC_APB2DIVR); set_clkdiv(clkdiv[CLKDIV_APB3], rcc + RCC_APB3DIVR); /* no ready bit for RTC */ writel(clkdiv[CLKDIV_RTC] & RCC_DIVR_DIV_MASK, rcc + RCC_RTCDIVR); /* configure PLLs source */ dev_dbg(dev, "configure PLLs source\n"); set_clksrc(priv, clksrc[CLKSRC_PLL12]); set_clksrc(priv, clksrc[CLKSRC_PLL3]); set_clksrc(priv, clksrc[CLKSRC_PLL4]); /* configure and start PLLs */ dev_dbg(dev, "configure PLLs\n"); for (i = 0; i < _PLL_NB; i++) { if (!pllcfg_valid[i]) continue; dev_dbg(dev, "configure PLL %d\n", i); pll_config(priv, i, pllcfg[i], pllfracv[i]); if (pllcsg_set[i]) pll_csg(priv, i, pllcsg[i]); pll_start(priv, i); } /* wait and start PLLs ouptut when ready */ for (i = 0; i < _PLL_NB; i++) { if (!pllcfg_valid[i]) continue; dev_dbg(dev, "output PLL %d\n", i); pll_output(priv, i, pllcfg[i][PLLCFG_O]); } /* wait LSE ready before to use it */ if (clk_valid(&priv->osc_clk[_LSE])) stm32mp1_lse_wait(rcc); /* configure with expected clock source */ dev_dbg(dev, "CLKSRC\n"); set_clksrc(priv, clksrc[CLKSRC_MPU]); set_clksrc(priv, clksrc[CLKSRC_AXI]); set_clksrc(priv, clksrc[CLKSRC_MCU]); set_rtcsrc(priv, clksrc[CLKSRC_RTC], lse_css); /* configure PKCK */ dev_dbg(dev, "PKCK\n"); pkcs_cell = dev_read_prop(dev, "st,pkcs", &len); if (pkcs_cell) { bool ckper_disabled = false; for (i = 0; i < len / sizeof(u32); i++) { u32 pkcs = (u32)fdt32_to_cpu(pkcs_cell[i]); if (pkcs == CLK_CKPER_DISABLED) { ckper_disabled = true; continue; } pkcs_config(priv, pkcs); } /* CKPER is source for some peripheral clock * (FMC-NAND / QPSI-NOR) and switching source is allowed * only if previous clock is still ON * => deactivated CKPER only after switching clock */ if (ckper_disabled) pkcs_config(priv, CLK_CKPER_DISABLED); } /* STGEN clock source can change with CLK_STGEN_XXX */ stgen_config(priv); dev_dbg(dev, "oscillator off\n"); /* switch OFF HSI if not found in device-tree */ if (!clk_valid(&priv->osc_clk[_HSI])) stm32mp1_hsi_set(rcc, 0); /* Software Self-Refresh mode (SSR) during DDR initilialization */ clrsetbits_le32(priv->base + RCC_DDRITFCR, RCC_DDRITFCR_DDRCKMOD_MASK, RCC_DDRITFCR_DDRCKMOD_SSR << RCC_DDRITFCR_DDRCKMOD_SHIFT); return 0; } #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; /* 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) { #if defined(STM32MP1_CLOCK_TREE_INIT) && \ defined(CONFIG_STM32MP1_DDR_INTERACTIVE) case DDRPHYC: break; #endif case LTDC_PX: case DSI_PX: break; default: dev_err(clk->dev, "Set of clk %ld not supported", clk->id); return -EINVAL; } p = stm32mp1_clk_get_parent(priv, clk->id); dev_vdbg(clk->dev, "parent = %d:%s\n", p, stm32mp1_clk_parent_name[p]); if (p < 0) return -EINVAL; switch (p) { #if defined(STM32MP1_CLOCK_TREE_INIT) && \ defined(CONFIG_STM32MP1_DDR_INTERACTIVE) case _PLL2_R: /* DDRPHYC */ { /* only for change DDR clock in interactive mode */ ulong result; set_clksrc(priv, CLK_AXI_HSI); result = pll_set_rate(clk->dev, _PLL2, _DIV_R, clk_rate); set_clksrc(priv, CLK_AXI_PLL2P); return result; } #endif 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_init(struct udevice *dev) { struct stm32mp1_clk_priv *priv = dev_get_priv(dev); int i; const char *name[NB_OSC] = { [_LSI] = "lsi", [_LSE] = "lse", [_HSI] = "hsi", [_HSE] = "hse", [_CSI] = "csi", [_I2S_CKIN] = "i2s_ckin", }; for (i = 0; i < NB_OSC; i++) { if (clk_get_by_name(dev, name[i], &priv->osc_clk[i])) dev_dbg(dev, "No source clock \"%s\"\n", name[i]); else dev_dbg(dev, "%s clock rate: %luHz\n", name[i], clk_get_rate(&priv->osc_clk[i])); } } 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_DRIVER_GET(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; struct stm32mp1_clk_priv *priv = dev_get_priv(dev); priv->base = dev_read_addr(dev->parent); if (priv->base == FDT_ADDR_T_NONE) return -EINVAL; priv->data = (void *)&stm32mp1_data; if (!priv->data->gate || !priv->data->sel || !priv->data->pll) return -EINVAL; stm32mp1_osc_init(dev); #ifdef STM32MP1_CLOCK_TREE_INIT /* clock tree init is done only one time, before relocation */ if (!(gd->flags & GD_FLG_RELOC)) result = stm32mp1_clktree(dev); if (result) dev_err(dev, "clock tree initialization failed (%d)\n", result); #endif #ifndef CONFIG_SPL_BUILD #if defined(VERBOSE_DEBUG) /* display debug information for probe after relocation */ if (gd->flags & GD_FLG_RELOC) stm32mp1_clk_dump(priv); #endif gd->cpu_clk = stm32mp1_clk_get(priv, _CK_MPU); gd->bus_clk = stm32mp1_clk_get(priv, _ACLK); /* DDRPHYC father */ gd->mem_clk = stm32mp1_clk_get(priv, _PLL2_R); #if defined(CONFIG_DISPLAY_CPUINFO) if (gd->flags & GD_FLG_RELOC) { char buf[32]; log_info("Clocks:\n"); log_info("- MPU : %s MHz\n", strmhz(buf, gd->cpu_clk)); log_info("- MCU : %s MHz\n", strmhz(buf, stm32mp1_clk_get(priv, _CK_MCU))); log_info("- AXI : %s MHz\n", strmhz(buf, gd->bus_clk)); log_info("- PER : %s MHz\n", strmhz(buf, stm32mp1_clk_get(priv, _CK_PER))); log_info("- DDR : %s MHz\n", strmhz(buf, gd->mem_clk)); } #endif /* CONFIG_DISPLAY_CPUINFO */ #endif return result; } static const struct clk_ops stm32mp1_clk_ops = { .enable = stm32mp1_clk_enable, .disable = stm32mp1_clk_disable, .get_rate = stm32mp1_clk_get_rate, .set_rate = stm32mp1_clk_set_rate, }; U_BOOT_DRIVER(stm32mp1_clock) = { .name = "stm32mp1_clk", .id = UCLASS_CLK, .ops = &stm32mp1_clk_ops, .priv_auto = sizeof(struct stm32mp1_clk_priv), .probe = stm32mp1_clk_probe, };