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| 1 | +/* |
| 2 | + * Copyright 2025 NXP |
| 3 | + * SPDX-License-Identifier: Apache-2.0 |
| 4 | + */ |
| 5 | +#include <zephyr/init.h> |
| 6 | +#include <zephyr/device.h> |
| 7 | +#include <zephyr/dt-bindings/clock/mcux_lpc_syscon_clock.h> |
| 8 | +#include <fsl_clock.h> |
| 9 | +#include <fsl_spc.h> |
| 10 | +#include <soc.h> |
| 11 | + |
| 12 | +/* Core clock frequency: 180MHz */ |
| 13 | +#define CLOCK_INIT_CORE_CLOCK 180000000U |
| 14 | +#define BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK 180000000U |
| 15 | +/* System clock frequency. */ |
| 16 | +extern uint32_t SystemCoreClock; |
| 17 | + |
| 18 | +void board_early_init_hook(void) |
| 19 | +{ |
| 20 | + uint32_t coreFreq; |
| 21 | + spc_active_mode_core_ldo_option_t ldoOption; |
| 22 | + spc_sram_voltage_config_t sramOption; |
| 23 | + |
| 24 | + /* Get the CPU Core frequency */ |
| 25 | + coreFreq = CLOCK_GetCoreSysClkFreq(); |
| 26 | + |
| 27 | + /* The flow of increasing voltage and frequency */ |
| 28 | + if (coreFreq <= BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK) { |
| 29 | + /* Set the LDO_CORE VDD regulator level */ |
| 30 | + ldoOption.CoreLDOVoltage = kSPC_CoreLDO_OverDriveVoltage; |
| 31 | + ldoOption.CoreLDODriveStrength = kSPC_CoreLDO_NormalDriveStrength; |
| 32 | + (void)SPC_SetActiveModeCoreLDORegulatorConfig(SPC0, &ldoOption); |
| 33 | + /* Configure Flash to support different voltage level and frequency */ |
| 34 | + FMU0->FCTRL = |
| 35 | + (FMU0->FCTRL & ~((uint32_t)FMU_FCTRL_RWSC_MASK)) | (FMU_FCTRL_RWSC(0x4U)); |
| 36 | + /* Specifies the operating voltage for the SRAM's read/write timing margin */ |
| 37 | + sramOption.operateVoltage = kSPC_sramOperateAt1P2V; |
| 38 | + sramOption.requestVoltageUpdate = true; |
| 39 | + (void)SPC_SetSRAMOperateVoltage(SPC0, &sramOption); |
| 40 | + } |
| 41 | + |
| 42 | + /*!< Set up system dividers */ |
| 43 | + CLOCK_SetClockDiv(kCLOCK_DivAHBCLK, 1U); /* !< Set SYSCON.AHBCLKDIV divider to value 1 */ |
| 44 | + CLOCK_SetClockDiv(kCLOCK_DivFRO_HF, 1U); /* !< Set SYSCON.FROHFDIV divider to value 1 */ |
| 45 | + CLOCK_SetupFROHFClocking(BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK); /*!< Enable FRO HF */ |
| 46 | + CLOCK_SetupFRO12MClocking(); /*!< Setup FRO12M clock */ |
| 47 | + |
| 48 | + CLOCK_AttachClk(kFRO_HF_to_MAIN_CLK); /* !< Switch MAIN_CLK to kFRO_HF */ |
| 49 | + |
| 50 | + /* The flow of decreasing voltage and frequency */ |
| 51 | + if (coreFreq > BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK) { |
| 52 | + /* Configure Flash to support different voltage level and frequency */ |
| 53 | + FMU0->FCTRL = |
| 54 | + (FMU0->FCTRL & ~((uint32_t)FMU_FCTRL_RWSC_MASK)) | (FMU_FCTRL_RWSC(0x4U)); |
| 55 | + /* Specifies the operating voltage for the SRAM's read/write timing margin */ |
| 56 | + sramOption.operateVoltage = kSPC_sramOperateAt1P2V; |
| 57 | + sramOption.requestVoltageUpdate = true; |
| 58 | + (void)SPC_SetSRAMOperateVoltage(SPC0, &sramOption); |
| 59 | + /* Set the LDO_CORE VDD regulator level */ |
| 60 | + ldoOption.CoreLDOVoltage = kSPC_CoreLDO_OverDriveVoltage; |
| 61 | + ldoOption.CoreLDODriveStrength = kSPC_CoreLDO_NormalDriveStrength; |
| 62 | + (void)SPC_SetActiveModeCoreLDORegulatorConfig(SPC0, &ldoOption); |
| 63 | + } |
| 64 | + |
| 65 | + /*!< Set up clock selectors - Attach clocks to the peripheries */ |
| 66 | + CLOCK_AttachClk(kCPU_CLK_to_TRACE); /* !< Switch TRACE to CPU_CLK */ |
| 67 | + |
| 68 | + /*!< Set up dividers */ |
| 69 | + CLOCK_SetClockDiv(kCLOCK_DivFRO_LF, 1U); /* !< Set SYSCON.FROLFDIV divider to value 1 */ |
| 70 | + CLOCK_SetClockDiv(kCLOCK_DivTRACE, 2U); /* !< Set MRCC.TRACE_CLKDIV divider to value 2 */ |
| 71 | + |
| 72 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(porta)) |
| 73 | + RESET_ReleasePeripheralReset(kPORT0_RST_SHIFT_RSTn); |
| 74 | + CLOCK_EnableClock(kCLOCK_GatePORT0); |
| 75 | +#endif |
| 76 | + |
| 77 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(portb)) |
| 78 | + RESET_ReleasePeripheralReset(kPORT1_RST_SHIFT_RSTn); |
| 79 | + CLOCK_EnableClock(kCLOCK_GatePORT1); |
| 80 | +#endif |
| 81 | + |
| 82 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(portc)) |
| 83 | + RESET_ReleasePeripheralReset(kPORT2_RST_SHIFT_RSTn); |
| 84 | + CLOCK_EnableClock(kCLOCK_GatePORT2); |
| 85 | +#endif |
| 86 | + |
| 87 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(portd)) |
| 88 | + RESET_ReleasePeripheralReset(kPORT3_RST_SHIFT_RSTn); |
| 89 | + CLOCK_EnableClock(kCLOCK_GatePORT3); |
| 90 | +#endif |
| 91 | + |
| 92 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(porte)) |
| 93 | + RESET_ReleasePeripheralReset(kPORT4_RST_SHIFT_RSTn); |
| 94 | + CLOCK_EnableClock(kCLOCK_GatePORT4); |
| 95 | +#endif |
| 96 | + |
| 97 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio0)) |
| 98 | + RESET_ReleasePeripheralReset(kGPIO0_RST_SHIFT_RSTn); |
| 99 | + CLOCK_EnableClock(kCLOCK_GateGPIO0); |
| 100 | +#endif |
| 101 | + |
| 102 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio1)) |
| 103 | + RESET_ReleasePeripheralReset(kGPIO1_RST_SHIFT_RSTn); |
| 104 | + CLOCK_EnableClock(kCLOCK_GateGPIO1); |
| 105 | +#endif |
| 106 | + |
| 107 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio2)) |
| 108 | + RESET_ReleasePeripheralReset(kGPIO2_RST_SHIFT_RSTn); |
| 109 | + CLOCK_EnableClock(kCLOCK_GateGPIO2); |
| 110 | +#endif |
| 111 | + |
| 112 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio3)) |
| 113 | + RESET_ReleasePeripheralReset(kGPIO3_RST_SHIFT_RSTn); |
| 114 | + CLOCK_EnableClock(kCLOCK_GateGPIO3); |
| 115 | +#endif |
| 116 | + |
| 117 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio4)) |
| 118 | + RESET_ReleasePeripheralReset(kGPIO4_RST_SHIFT_RSTn); |
| 119 | + CLOCK_EnableClock(kCLOCK_GateGPIO4); |
| 120 | +#endif |
| 121 | + |
| 122 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart0)) |
| 123 | + CLOCK_SetClockDiv(kCLOCK_DivLPUART0, 1u); |
| 124 | + CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART0); |
| 125 | + RESET_ReleasePeripheralReset(kLPUART0_RST_SHIFT_RSTn); |
| 126 | +#endif |
| 127 | + |
| 128 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart1)) |
| 129 | + CLOCK_SetClockDiv(kCLOCK_DivLPUART1, 1u); |
| 130 | + CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART1); |
| 131 | + RESET_ReleasePeripheralReset(kLPUART1_RST_SHIFT_RSTn); |
| 132 | +#endif |
| 133 | + |
| 134 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart2)) |
| 135 | + CLOCK_SetClockDiv(kCLOCK_DivLPUART2, 1u); |
| 136 | + CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART2); |
| 137 | + RESET_ReleasePeripheralReset(kLPUART2_RST_SHIFT_RSTn); |
| 138 | +#endif |
| 139 | + |
| 140 | +#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart3)) |
| 141 | + CLOCK_SetClockDiv(kCLOCK_DivLPUART3, 1u); |
| 142 | + CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART3); |
| 143 | + RESET_ReleasePeripheralReset(kLPUART3_RST_SHIFT_RSTn); |
| 144 | +#endif |
| 145 | + |
| 146 | + /* Set SystemCoreClock variable. */ |
| 147 | + SystemCoreClock = CLOCK_INIT_CORE_CLOCK; |
| 148 | +} |
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