1 /*
2  * Copyright (c) 2016 Nordic Semiconductor ASA
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 
7 /**
8  * @file
9  * @brief System/hardware module for Nordic Semiconductor nRF52 family processor
10  *
11  * This module provides routines to initialize and support board-level hardware
12  * for the Nordic Semiconductor nRF52 family processor.
13  */
14 
15 #include <zephyr/devicetree.h>
16 #include <zephyr/dt-bindings/regulator/nrf5x.h>
17 #include <zephyr/kernel.h>
18 #include <zephyr/init.h>
19 #include <hal/nrf_power.h>
20 #include <soc/nrfx_coredep.h>
21 #include <zephyr/logging/log.h>
22 
23 #include <cmsis_core.h>
24 
25 #define LOG_LEVEL CONFIG_SOC_LOG_LEVEL
26 LOG_MODULE_REGISTER(soc);
27 
nordicsemi_nrf52_init(void)28 static int nordicsemi_nrf52_init(void)
29 {
30 #ifdef CONFIG_NRF_ENABLE_ICACHE
31 	/* Enable the instruction cache */
32 	NRF_NVMC->ICACHECNF = NVMC_ICACHECNF_CACHEEN_Msk;
33 #endif
34 
35 #if defined(CONFIG_SOC_DCDC_NRF52X) || (DT_PROP(DT_INST(0, nordic_nrf5x_regulator),                \
36 						regulator_initial_mode) == NRF5X_REG_MODE_DCDC)
37 	nrf_power_dcdcen_set(NRF_POWER, true);
38 #endif
39 #if NRF_POWER_HAS_DCDCEN_VDDH && (defined(CONFIG_SOC_DCDC_NRF52X_HV) || \
40 	DT_NODE_HAS_STATUS_OKAY(DT_INST(0, nordic_nrf52x_regulator_hv)))
41 	nrf_power_dcdcen_vddh_set(NRF_POWER, true);
42 #endif
43 
44 	return 0;
45 }
46 
arch_busy_wait(uint32_t time_us)47 void arch_busy_wait(uint32_t time_us)
48 {
49 	nrfx_coredep_delay_us(time_us);
50 }
51 
52 SYS_INIT(nordicsemi_nrf52_init, PRE_KERNEL_1, 0);
53