113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/*
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* Copyright (c) 2018, Piotr Mienkowski
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* Copyright (c) 2023, Antmicro <www.antmicro.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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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 <sl_power_manager.h>
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LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL);
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/*
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* Power state map:
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* PM_STATE_RUNTIME_IDLE: EM1 Sleep
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* PM_STATE_SUSPEND_TO_IDLE: EM2 Deep Sleep
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* PM_STATE_STANDBY: EM3 Stop
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* PM_STATE_SOFT_OFF: EM4
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*/
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/* Invoke Low Power/System Off specific Tasks */
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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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sl_power_manager_em_t energy_mode = SL_POWER_MANAGER_EM0;
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LOG_DBG("SoC entering power state %d", state);
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switch (state) {
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case PM_STATE_RUNTIME_IDLE:
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energy_mode = SL_POWER_MANAGER_EM1;
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break;
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case PM_STATE_SUSPEND_TO_IDLE:
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energy_mode = SL_POWER_MANAGER_EM2;
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break;
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case PM_STATE_STANDBY:
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energy_mode = SL_POWER_MANAGER_EM3;
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break;
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case PM_STATE_SOFT_OFF:
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energy_mode = SL_POWER_MANAGER_EM4;
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break;
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default:
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LOG_DBG("Unsupported power state %d", state);
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break;
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}
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/* FIXME: When this function is entered the Kernel has disabled
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* interrupts using BASEPRI register. This is incorrect as it prevents
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* waking up from any interrupt which priority is not 0. Work around the
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* issue and disable interrupts using PRIMASK register as recommended
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* by ARM.
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*/
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/* Set PRIMASK */
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__disable_irq();
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/* Set BASEPRI to 0 */
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irq_unlock(0);
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LOG_DBG("Entry to energy mode %d", energy_mode);
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if (energy_mode != SL_POWER_MANAGER_EM0) {
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sl_power_manager_add_em_requirement(energy_mode);
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sl_power_manager_sleep();
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k_cpu_idle();
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sl_power_manager_remove_em_requirement(energy_mode);
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}
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LOG_DBG("Exit from energy mode %d", energy_mode);
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/* Clear PRIMASK */
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__enable_irq();
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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(state);
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ARG_UNUSED(substate_id);
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}
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/**
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* Some SiLabs blobs, such as RAIL, call directly into sl_power_manager, and
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* for that they had to include sl_power_manager.h during build. Some of those
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* blobs have been compiled with -DSL_POWER_MANAGER_DEBUG=1, making inlined
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* functions from that header to rely on
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* sli_power_manager_debug_log_em_requirement() callback.
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*
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* This is irrespective of whether *we* enable SL_POWER_MANAGER_DEBUG when
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* compiling sl_power_manager code as part of Zephyr build.
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*
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* Therefore, we provide sli_power_manager_debug_log_em_requirement()
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* definition here just to satisfy those blobs. It will also be used if we
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* attempt to build sl_power_manager with SL_POWER_MANAGER_DEBUG enabled.
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*
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* @note Please keep this at the end of the file.
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*/
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#ifdef sli_power_manager_debug_log_em_requirement
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#undef sli_power_manager_debug_log_em_requirement
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#endif
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void sli_power_manager_debug_init(void)
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{
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}
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void sli_power_manager_debug_log_em_requirement(
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sl_power_manager_em_t em, bool add, const char *name)
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{
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LOG_DBG("Set PM requirement em=%d add=%s name=%s",
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(int)em, add ? "true" : "false", name);
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}
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