52 lines
1.2 KiB
C
52 lines
1.2 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 <string.h>
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#include <device.h>
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#include <sys/atomic.h>
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#include <pm/state.h>
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#include "policy/pm_policy.h"
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#define LOG_LEVEL CONFIG_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 PM_STATES_LEN (1 + PM_STATE_SOFT_OFF - PM_STATE_ACTIVE)
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static atomic_t power_state_disable_count[PM_STATES_LEN];
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void pm_constraint_set(enum pm_state state)
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{
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atomic_val_t v;
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__ASSERT(state < PM_STATES_LEN, "Invalid power state!");
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v = atomic_inc(&power_state_disable_count[state]);
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__ASSERT(v < UINT_MAX, "Power state disable count overflowed!");
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/* Make compiler happy when assertions are disabled. */
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(void)(v);
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}
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void pm_constraint_release(enum pm_state state)
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{
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atomic_val_t v;
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__ASSERT(state < PM_STATES_LEN, "Invalid power state!");
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v = atomic_dec(&power_state_disable_count[state]);
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__ASSERT(v > 0, "Power state disable count underflowed!");
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/* Make compiler happy when assertions are disabled. */
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(void)(v);
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}
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bool pm_constraint_get(enum pm_state state)
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{
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__ASSERT(state < PM_STATES_LEN, "Invalid power state!");
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return (atomic_get(&power_state_disable_count[state]) == 0);
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}
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