1 /* 2 * Copyright (c) 2020 Linaro Limited 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief System/hardware module for STM32L5 processor 10 */ 11 12 #include <zephyr/device.h> 13 #include <zephyr/init.h> 14 #include <stm32_ll_bus.h> 15 #include <stm32_ll_pwr.h> 16 #include <stm32l5xx_ll_icache.h> 17 #include <zephyr/logging/log.h> 18 19 #include <cmsis_core.h> 20 21 #define LOG_LEVEL CONFIG_SOC_LOG_LEVEL 22 LOG_MODULE_REGISTER(soc); 23 24 extern void stm32_power_init(void); 25 /** 26 * @brief Perform basic hardware initialization at boot. 27 * 28 * This needs to be run from the very beginning. 29 */ soc_early_init_hook(void)30void soc_early_init_hook(void) 31 { 32 /* Enable ICACHE */ 33 while (LL_ICACHE_IsActiveFlag_BUSY()) { 34 } 35 LL_ICACHE_Enable(); 36 37 /* Update CMSIS SystemCoreClock variable (HCLK) */ 38 /* At reset, system core clock is set to 4 MHz from MSI */ 39 SystemCoreClock = 4000000; 40 41 /* Enable Scale 0 to achieve 110MHz */ 42 LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR); 43 LL_PWR_SetRegulVoltageScaling(LL_PWR_REGU_VOLTAGE_SCALE0); 44 45 if (IS_ENABLED(CONFIG_DT_HAS_ST_STM32_UCPD_ENABLED) || 46 !IS_ENABLED(CONFIG_USB_DEVICE_DRIVER)) { 47 /* Disable USB Type-C dead battery pull-down behavior */ 48 LL_PWR_DisableUCPDDeadBattery(); 49 } 50 #if CONFIG_PM 51 stm32_power_init(); 52 #endif 53 } 54
