118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/*
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* Copyright (c) 2017, NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief System/hardware module for nxp_lpc55s69 platform
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*
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* This module provides routines to initialize and support board-level
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* hardware for the nxp_lpc55s69 platform.
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*/
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#include <kernel.h>
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#include <device.h>
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#include <init.h>
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#include <soc.h>
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#include <drivers/uart.h>
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#include <linker/sections.h>
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#include <arch/cpu.h>
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#include <aarch32/cortex_m/exc.h>
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#include <fsl_power.h>
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#include <fsl_clock.h>
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#include <fsl_common.h>
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#include <fsl_device_registers.h>
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#include <fsl_pint.h>
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/**
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*
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* @brief Initialize the system clock
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*
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* @return N/A
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*
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*/
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static ALWAYS_INLINE void clock_init(void)
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{
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#ifdef CONFIG_SOC_LPC55S69_CPU0
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/*!< Set up the clock sources */
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/*!< Configure FRO192M */
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/*!< Ensure FRO is on */
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POWER_DisablePD(kPDRUNCFG_PD_FRO192M);
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/*!< Set up FRO to the 12 MHz, just for sure */
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CLOCK_SetupFROClocking(12000000U);
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/*!< Switch to FRO 12MHz first to ensure we can change the clock */
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CLOCK_AttachClk(kFRO12M_to_MAIN_CLK);
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/* Enable FRO HF(96MHz) output */
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CLOCK_SetupFROClocking(96000000U);
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/*!< Set FLASH wait states for core */
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CLOCK_SetFLASHAccessCyclesForFreq(96000000U);
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/*!< Set up dividers */
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CLOCK_SetClkDiv(kCLOCK_DivAhbClk, 1U, false);
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/*!< Set up clock selectors - Attach clocks to the peripheries */
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CLOCK_AttachClk(kFRO_HF_to_MAIN_CLK);
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/* Enables the clock for the I/O controller.: Enable Clock. */
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CLOCK_EnableClock(kCLOCK_Iocon);
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#ifdef CONFIG_SPI_8
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/* Attach 12 MHz clock to FLEXCOMM8 */
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CLOCK_AttachClk(kFRO12M_to_HSLSPI);
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/* reset FLEXCOMM for SPI */
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RESET_PeripheralReset(kHSLSPI_RST_SHIFT_RSTn);
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#endif /* CONFIG_SPI_8 */
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#endif /* CONFIG_SOC_LPC55S69_CPU0 */
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}
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/**
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*
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* @brief Perform basic hardware initialization
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*
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* Initialize the interrupt controller device drivers.
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* Also initialize the timer device driver, if required.
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*
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* @return 0
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*/
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static int nxp_lpc55s69_init(struct device *arg)
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{
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ARG_UNUSED(arg);
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/* old interrupt lock level */
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unsigned int oldLevel;
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/* disable interrupts */
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oldLevel = irq_lock();
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z_arm_clear_faults();
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/* Initialize FRO/system clock to 96 MHz */
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clock_init();
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#ifdef CONFIG_GPIO_MCUX_LPC
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/* Turn on PINT device*/
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PINT_Init(PINT);
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#endif
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/*
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* install default handler that simply resets the CPU if configured in
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* the kernel, NOP otherwise
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*/
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NMI_INIT();
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/* restore interrupt state */
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irq_unlock(oldLevel);
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return 0;
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}
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SYS_INIT(nxp_lpc55s69_init, PRE_KERNEL_1, 0);
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