80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/*
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* Copyright (c) 2018 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <kernel.h>
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#include "pm_policy.h"
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#define LOG_LEVEL CONFIG_SYS_PM_LOG_LEVEL /* From power module Kconfig */
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#include <logging/log.h>
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LOG_MODULE_DECLARE(power);
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#define SECS_TO_TICKS CONFIG_SYS_CLOCK_TICKS_PER_SEC
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/* PM Policy based on SoC/Platform residency requirements */
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static const unsigned int pm_min_residency[] = {
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#ifdef CONFIG_SYS_POWER_SLEEP_STATES
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#ifdef CONFIG_HAS_SYS_POWER_STATE_SLEEP_1
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CONFIG_SYS_PM_MIN_RESIDENCY_SLEEP_1 * SECS_TO_TICKS / MSEC_PER_SEC,
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#endif
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#ifdef CONFIG_HAS_SYS_POWER_STATE_SLEEP_2
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CONFIG_SYS_PM_MIN_RESIDENCY_SLEEP_2 * SECS_TO_TICKS / MSEC_PER_SEC,
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#endif
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#ifdef CONFIG_HAS_SYS_POWER_STATE_SLEEP_3
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CONFIG_SYS_PM_MIN_RESIDENCY_SLEEP_3 * SECS_TO_TICKS / MSEC_PER_SEC,
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#endif
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#endif /* CONFIG_SYS_POWER_SLEEP_STATES */
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#ifdef CONFIG_SYS_POWER_DEEP_SLEEP_STATES
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#ifdef CONFIG_HAS_SYS_POWER_STATE_DEEP_SLEEP_1
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CONFIG_SYS_PM_MIN_RESIDENCY_DEEP_SLEEP_1 * SECS_TO_TICKS / MSEC_PER_SEC,
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#endif
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#ifdef CONFIG_HAS_SYS_POWER_STATE_DEEP_SLEEP_2
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CONFIG_SYS_PM_MIN_RESIDENCY_DEEP_SLEEP_2 * SECS_TO_TICKS / MSEC_PER_SEC,
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#endif
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#ifdef CONFIG_HAS_SYS_POWER_STATE_DEEP_SLEEP_3
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CONFIG_SYS_PM_MIN_RESIDENCY_DEEP_SLEEP_3 * SECS_TO_TICKS / MSEC_PER_SEC,
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#endif
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#endif /* CONFIG_SYS_POWER_DEEP_SLEEP_STATES */
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};
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enum power_states sys_pm_policy_next_state(s32_t ticks)
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{
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int i;
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if ((ticks != K_TICKS_FOREVER) && (ticks < pm_min_residency[0])) {
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LOG_DBG("Not enough time for PM operations: %d", ticks);
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return SYS_POWER_STATE_ACTIVE;
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}
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for (i = ARRAY_SIZE(pm_min_residency) - 1; i >= 0; i--) {
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#ifdef CONFIG_SYS_PM_STATE_LOCK
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if (!sys_pm_ctrl_is_state_enabled((enum power_states)(i))) {
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continue;
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}
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#endif
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if ((ticks == K_TICKS_FOREVER) ||
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(ticks >= pm_min_residency[i])) {
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LOG_DBG("Selected power state %d "
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"(ticks: %d, min_residency: %u)",
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i, ticks, pm_min_residency[i]);
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return (enum power_states)(i);
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}
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}
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LOG_DBG("No suitable power state found!");
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return SYS_POWER_STATE_ACTIVE;
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}
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__weak bool sys_pm_policy_low_power_devices(enum power_states pm_state)
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{
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return sys_pm_is_sleep_state(pm_state);
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}
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