108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/*
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* Copyright (c) 2024 Ambiq Micro Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <soc.h>
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#include <zephyr/drivers/interrupt_controller/gic.h>
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#include <zephyr/kernel.h>
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#include <zephyr/logging/log.h>
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#include <zephyr/pm/pm.h>
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#include <zephyr/init.h>
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/* ambiq-sdk includes */
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#include <am_mcu_apollo.h>
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LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL);
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void pm_state_set(enum pm_state state, uint8_t substate_id)
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{
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ARG_UNUSED(substate_id);
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__disable_irq();
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__set_BASEPRI(0);
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switch (state) {
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case PM_STATE_SUSPEND_TO_IDLE:
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/* Put ARM core to normal sleep. */
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am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_NORMAL);
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break;
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case PM_STATE_SUSPEND_TO_RAM:
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/* Put ARM core to deep sleep. */
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/* Cotex-m: power down, register value preserve.*/
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/* Cache: power down*/
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/* Flash: power down*/
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/* Sram: retention*/
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am_hal_sysctrl_sleep(AM_HAL_SYSCTRL_SLEEP_DEEP);
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break;
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default:
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LOG_DBG("Unsupported power state %u", state);
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break;
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}
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}
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/**
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* @brief PM State Exit Post Operations
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*
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* For PM_STATE_SUSPEND_TO_IDLE:
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* Nothing is needed after soc woken up.
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*
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* For PM_STATE_SUSPEND_TO_RAM:
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* Flash, cache, sram automatically switch
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* to active state on wake up
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*
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* @param state PM State
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* @param substate_id Unused
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*
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*/
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void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id)
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{
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ARG_UNUSED(substate_id);
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__enable_irq();
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irq_unlock(0);
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}
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static int ambiq_power_init(void)
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{
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/* Enable flash.
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* Currently all flash area is powered on, but we should only enable the used flash area and
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* put unused flash in power down mode.
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*/
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if (am_hal_pwrctrl_memory_enable(AM_HAL_PWRCTRL_MEM_FLASH_MAX)) {
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__ASSERT(0, "Failed to enable FLASH!");
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}
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/* Enable SRAM.
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* Currently all SRAM area is powered on, but we should only enable the used ram area and
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* put unused ram in power down mode.
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*/
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if (am_hal_pwrctrl_memory_enable(AM_HAL_PWRCTRL_MEM_SRAM_MAX)) {
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__ASSERT(0, "Failed to enable SRAM!");
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}
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/* For optimal Deep Sleep current, configure cache to be powered-down in deepsleep. */
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am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_CACHE);
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/* Power off all flash area, when go to deep sleep.*/
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am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_FLASH_MAX);
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/* Keep the used SRAM area in retention mode. */
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am_hal_pwrctrl_memory_deepsleep_powerdown(AM_HAL_PWRCTRL_MEM_SRAM_MAX);
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am_hal_pwrctrl_memory_deepsleep_retain(AM_HAL_PWRCTRL_MEM_SRAM_MAX);
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#if defined(CONFIG_SOC_APOLLO3P_BLUE)
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/*
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* If user has enabled AM_HAL_SYSCTRL_DEEPSLEEP_WA in am_hal_sysctrl.h
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* this will allow user to acheive lower current draw in deepsleep
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*/
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am_hal_sysctrl_control(AM_HAL_SYSCTRL_CONTROL_DEEPSLEEP_MINPWR_EN, 0);
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#endif
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return 0;
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}
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SYS_INIT(ambiq_power_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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