65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
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* Copyright (c) 2021 Vestas Wind Systems A/S
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* Copyright (c) 2021, NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <logging/log.h>
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#include <pm/pm.h>
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#include <soc.h>
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LOG_MODULE_DECLARE(power, CONFIG_PM_LOG_LEVEL);
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#ifdef CONFIG_XIP
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__ramfunc static void wait_for_flash_prefetch_and_idle(void)
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{
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uint32_t i;
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for (i = 0; i < 8; i++) {
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arch_nop();
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}
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k_cpu_idle();
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}
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#endif /* CONFIG_XIP */
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__weak void pm_power_state_set(struct pm_state_info info)
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{
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switch (info.state) {
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case PM_STATE_RUNTIME_IDLE:
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k_cpu_idle();
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break;
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case PM_STATE_SUSPEND_TO_IDLE:
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/* Set partial stop mode and enable deep sleep */
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SMC->STOPCTRL = SMC_STOPCTRL_PSTOPO(info.substate_id);
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SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
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#ifdef CONFIG_XIP
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wait_for_flash_prefetch_and_idle();
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#else /* CONFIG_XIP */
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k_cpu_idle();
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#endif /* !CONFIG_XIP */
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if (SMC->PMCTRL & SMC_PMCTRL_STOPA_MASK) {
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LOG_DBG("partial stop aborted");
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}
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break;
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default:
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LOG_WRN("Unsupported power state %u", info.state);
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break;
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}
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}
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__weak void pm_power_state_exit_post_ops(struct pm_state_info info)
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{
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ARG_UNUSED(info);
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if (info.state == PM_STATE_SUSPEND_TO_IDLE) {
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/* Disable deep sleep upon exit */
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SCB->SCR &= ~(SCB_SCR_SLEEPDEEP_Msk);
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}
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irq_unlock(0);
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}
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