boards/nxp/frdm_mcxa276/board.c

/*
 * Copyright 2024-2025  NXP
 * SPDX-License-Identifier: Apache-2.0
 */
#include <zephyr/init.h>
#include <zephyr/device.h>
#include <zephyr/dt-bindings/clock/mcux_lpc_syscon_clock.h>
#include <fsl_clock.h>
#include <fsl_spc.h>
#include <soc.h>

/* Core clock frequency: 180MHz */
#define CLOCK_INIT_CORE_CLOCK               180000000U
#define BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK 180000000U
/* System clock frequency. */
extern uint32_t SystemCoreClock;

void board_early_init_hook(void)
{
	uint32_t coreFreq;
	spc_active_mode_core_ldo_option_t ldoOption;
	spc_sram_voltage_config_t sramOption;

	/* Get the CPU Core frequency */
	coreFreq = CLOCK_GetCoreSysClkFreq();

	/* The flow of increasing voltage and frequency */
	if (coreFreq <= BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK) {
		/* Set the LDO_CORE VDD regulator level */
		ldoOption.CoreLDOVoltage = kSPC_CoreLDO_OverDriveVoltage;
		ldoOption.CoreLDODriveStrength = kSPC_CoreLDO_NormalDriveStrength;
		(void)SPC_SetActiveModeCoreLDORegulatorConfig(SPC0, &ldoOption);
		/* Configure Flash to support different voltage level and frequency */
		FMU0->FCTRL =
			(FMU0->FCTRL & ~((uint32_t)FMU_FCTRL_RWSC_MASK)) | (FMU_FCTRL_RWSC(0x4U));
		/* Specifies the operating voltage for the SRAM's read/write timing margin */
		sramOption.operateVoltage = kSPC_sramOperateAt1P2V;
		sramOption.requestVoltageUpdate = true;
		(void)SPC_SetSRAMOperateVoltage(SPC0, &sramOption);
	}

	/*!< Set up system dividers */
	CLOCK_SetClockDiv(kCLOCK_DivAHBCLK, 1U); /* !< Set SYSCON.AHBCLKDIV divider to value 1 */
	CLOCK_SetClockDiv(kCLOCK_DivFRO_HF, 1U); /* !< Set SYSCON.FROHFDIV divider to value 1 */
	CLOCK_SetupFROHFClocking(BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK); /*!< Enable FRO HF */
	CLOCK_SetupFRO12MClocking();             /*!< Setup FRO12M clock */

	CLOCK_AttachClk(kFRO_HF_to_MAIN_CLK); /* !< Switch MAIN_CLK to kFRO_HF */

	/* The flow of decreasing voltage and frequency */
	if (coreFreq > BOARD_BOOTCLOCKFROHF180M_CORE_CLOCK) {
		/* Configure Flash to support different voltage level and frequency */
		FMU0->FCTRL =
			(FMU0->FCTRL & ~((uint32_t)FMU_FCTRL_RWSC_MASK)) | (FMU_FCTRL_RWSC(0x4U));
		/* Specifies the operating voltage for the SRAM's read/write timing margin */
		sramOption.operateVoltage = kSPC_sramOperateAt1P2V;
		sramOption.requestVoltageUpdate = true;
		(void)SPC_SetSRAMOperateVoltage(SPC0, &sramOption);
		/* Set the LDO_CORE VDD regulator level */
		ldoOption.CoreLDOVoltage = kSPC_CoreLDO_OverDriveVoltage;
		ldoOption.CoreLDODriveStrength = kSPC_CoreLDO_NormalDriveStrength;
		(void)SPC_SetActiveModeCoreLDORegulatorConfig(SPC0, &ldoOption);
	}

	/*!< Set up clock selectors - Attach clocks to the peripheries */
	CLOCK_AttachClk(kCPU_CLK_to_TRACE); /* !< Switch TRACE to CPU_CLK */

	/*!< Set up dividers */
	CLOCK_SetClockDiv(kCLOCK_DivFRO_LF, 1U); /* !< Set SYSCON.FROLFDIV divider to value 1 */
	CLOCK_SetClockDiv(kCLOCK_DivWWDT0, 1U);  /* !< Set MRCC.WWDT0_CLKDIV divider to value 1 */
	CLOCK_SetClockDiv(kCLOCK_DivTRACE, 2U);  /* !< Set MRCC.TRACE_CLKDIV divider to value 2 */

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(porta))
	RESET_ReleasePeripheralReset(kPORT0_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GatePORT0);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(portb))
	RESET_ReleasePeripheralReset(kPORT1_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GatePORT1);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(portc))
	RESET_ReleasePeripheralReset(kPORT2_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GatePORT2);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(portd))
	RESET_ReleasePeripheralReset(kPORT3_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GatePORT3);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(porte))
	RESET_ReleasePeripheralReset(kPORT4_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GatePORT4);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio0))
	RESET_ReleasePeripheralReset(kGPIO0_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GateGPIO0);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio1))
	RESET_ReleasePeripheralReset(kGPIO1_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GateGPIO1);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio2))
	RESET_ReleasePeripheralReset(kGPIO2_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GateGPIO2);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio3))
	RESET_ReleasePeripheralReset(kGPIO3_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GateGPIO3);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(gpio4))
	RESET_ReleasePeripheralReset(kGPIO4_RST_SHIFT_RSTn);
	CLOCK_EnableClock(kCLOCK_GateGPIO4);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart0))
	CLOCK_SetClockDiv(kCLOCK_DivLPUART0, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART0);
	RESET_ReleasePeripheralReset(kLPUART0_RST_SHIFT_RSTn);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart1))
	CLOCK_SetClockDiv(kCLOCK_DivLPUART1, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART1);
	RESET_ReleasePeripheralReset(kLPUART1_RST_SHIFT_RSTn);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart2))
	CLOCK_SetClockDiv(kCLOCK_DivLPUART2, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART2);
	RESET_ReleasePeripheralReset(kLPUART2_RST_SHIFT_RSTn);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart3))
	CLOCK_SetClockDiv(kCLOCK_DivLPUART3, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART3);
	RESET_ReleasePeripheralReset(kLPUART3_RST_SHIFT_RSTn);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpuart4))
	CLOCK_SetClockDiv(kCLOCK_DivLPUART4, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPUART4);
	RESET_ReleasePeripheralReset(kLPUART4_RST_SHIFT_RSTn);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(edma0))
	RESET_ReleasePeripheralReset(kDMA0_RST_SHIFT_RSTn);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(wwdt0))
	CLOCK_SetClockDiv(kCLOCK_DivWWDT0, 1u);
#endif


#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ctimer0))
	CLOCK_SetClockDiv(kCLOCK_DivCTIMER0, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_CTIMER0);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ctimer1))
	CLOCK_SetClockDiv(kCLOCK_DivCTIMER1, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_CTIMER1);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ctimer2))
	CLOCK_SetClockDiv(kCLOCK_DivCTIMER2, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_CTIMER2);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ctimer3))
	CLOCK_SetClockDiv(kCLOCK_DivCTIMER3, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_CTIMER3);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ctimer4))
	CLOCK_SetClockDiv(kCLOCK_DivCTIMER4, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_CTIMER4);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(wwdt0))
	CLOCK_SetClockDiv(kCLOCK_DivWWDT0, 1u);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpadc0)) || DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpadc1))
	CLOCK_SetClockDiv(kCLOCK_DivADC, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_ADC);

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(i3c0))
	CLOCK_SetClockDiv(kCLOCK_DivI3C0_FCLK, 15U);
	CLOCK_AttachClk(kFRO_HF_DIV_to_I3C0FCLK);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpadc0))
	CLOCK_EnableClock(kCLOCK_GateADC0);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpadc1))
	CLOCK_EnableClock(kCLOCK_GateADC1);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpi2c0))
	CLOCK_SetClockDiv(kCLOCK_DivLPI2C0, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPI2C0);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpi2c1))
	CLOCK_SetClockDiv(kCLOCK_DivLPI2C1, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPI2C1);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpi2c2))
	CLOCK_SetClockDiv(kCLOCK_DivLPI2C2, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPI2C2);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpi2c3))
	CLOCK_SetClockDiv(kCLOCK_DivLPI2C3, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPI2C3);
#endif

#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpspi0))
	/* Configure input clock to be able to reach the datasheet specified band rate. */
	CLOCK_SetClockDiv(kCLOCK_DivLPSPI0, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPSPI0);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lpspi1))
	/* Configure input clock to be able to reach the datasheet specified band rate. */
	CLOCK_SetClockDiv(kCLOCK_DivLPSPI1, 1u);
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPSPI1);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(ostimer0))
	CLOCK_AttachClk(kCLK_1M_to_OSTIMER);
#endif

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(lptmr0))

/*
 * Clock Select Decides what input source the lptmr will clock from
 *
 * 0 <- Reserved
 * 1 <- 16K FRO
 * 2 <- Reserved
 * 3 <- Combination of clocks configured in MRCC_LPTMR0_CLKSEL[MUX] field
 */
#if DT_PROP(DT_NODELABEL(lptmr0), clk_source) == 0x1
	CLOCK_SetupFRO16KClocking(kCLKE_16K_SYSTEM | kCLKE_16K_COREMAIN);
#elif DT_PROP(DT_NODELABEL(lptmr0), clk_source) == 0x3
	CLOCK_AttachClk(kFRO_LF_DIV_to_LPTMR0);
	CLOCK_SetClockDiv(kCLOCK_DivLPTMR0, 1u);
#endif /* DT_PROP(DT_NODELABEL(lptmr0), clk_source) */

#endif

	/* Set SystemCoreClock variable. */
	SystemCoreClock = CLOCK_INIT_CORE_CLOCK;
}