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https://github.com/zephyrproject-rtos/zephyr
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c45961daae
This commit simplifies OS <-> Application interface controlling power management. In the previous approach application-based PM required overriding sys_suspend() and sys_resume() functions. As these functions actually implemented power state change, in such case application basically had to provide own implementation of all PM-related stuff, which was not portable and hard to maintain. This commit changes this scheme: The sys_suspend() and sys_resume() are now system functions while the application could either use built-in power management policies or provide its own. All details of power mode switching are now handled by the OS. Also, this commit cleans up the Kconfig options related to system-level power management grouping them under common CONFIG_SYS_PM_ prefix. Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
49 lines
1.2 KiB
C
49 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 <atomic.h>
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#include "policy/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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static atomic_t power_state_disable_count[SYS_POWER_STATE_MAX];
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void sys_pm_ctrl_disable_state(enum power_states state)
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{
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atomic_val_t v;
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__ASSERT(state < SYS_POWER_STATE_MAX, "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 sys_pm_ctrl_enable_state(enum power_states state)
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{
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atomic_val_t v;
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__ASSERT(state < SYS_POWER_STATE_MAX, "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 sys_pm_ctrl_is_state_enabled(enum power_states state)
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{
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__ASSERT(state < SYS_POWER_STATE_MAX, "Invalid power state!");
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return (atomic_get(&power_state_disable_count[state]) == 0);
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}
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