soc/adi/max32/soc.c

/*
 * Copyright (c) 2023-2024 Analog Devices, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * @brief System/hardware module for MAX32xxx MCUs
 */

#include <zephyr/device.h>
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/pm/policy.h>

#include <wrap_max32_sys.h>

#ifdef CONFIG_MAX32_SECONDARY_RV32
#include <fcr_regs.h>
#endif

#if defined(CONFIG_MAX32_STANDBY_DELAY) && (CONFIG_MAX32_STANDBY_DELAY > 0)
struct k_timer max32_soc_timer;
void max32_soc_timer_callback(struct k_timer *timer_id)
{
	/* Allow the system to enter standby */
	pm_policy_state_lock_put(PM_STATE_STANDBY, PM_ALL_SUBSTATES);
}
#endif /* defined(MAX32_STANDBY_DELAY) && (MAX32_STANDBY_DELAY > 0) */

#if defined(CONFIG_MAX32_ON_ENTER_CPU_IDLE_HOOK)
bool z_arm_on_enter_cpu_idle(void)
{
	/* Returning false prevent device goes to sleep mode */
	return false;
}
#endif

/**
 * @brief Perform basic hardware initialization at boot.
 *
 * This needs to be run from the very beginning.
 */
void soc_early_init_hook(void)
{
	/* Apply device related preinit configuration */
	max32xx_system_init();

	/* Temporarily prevent  the system from entering standby to prevent debug lockout */
#if defined(CONFIG_MAX32_STANDBY_DELAY) && (CONFIG_MAX32_STANDBY_DELAY > 0)
	/* Prevent the system from entering standby mode */
	pm_policy_state_lock_get(PM_STATE_STANDBY, PM_ALL_SUBSTATES);

	/* Start a one-shot timer to put the pm lock */
	k_timer_init(&max32_soc_timer, max32_soc_timer_callback, NULL);
	k_timer_start(&max32_soc_timer, K_MSEC(CONFIG_MAX32_STANDBY_DELAY), K_NO_WAIT);
#endif /* defined(MAX32_STANDBY_DELAY) && (MAX32_STANDBY_DELAY > 0) */

#ifdef CONFIG_MAX32_SECONDARY_RV32
	MXC_FCR->urvbootaddr = CONFIG_MAX32_SECONDARY_RV32_BOOT_ADDRESS;
	MXC_SYS_ClockEnable(MXC_SYS_PERIPH_CLOCK_CPU1);
	MXC_GCR->rst1 |= MXC_F_GCR_RST1_CPU1;
#endif /* CONFIG_MAX32_SECONDARY_RV32 */
}