| /* |
| * Copyright (c) 2018, Piotr Mienkowski |
| * Copyright (c) 2023, Antmicro <www.antmicro.com> |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| #include <zephyr/kernel.h> |
| #include <zephyr/logging/log.h> |
| #include <zephyr/pm/pm.h> |
| #include <em_emu.h> |
| |
| LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL); |
| |
| /* |
| * Power state map: |
| * PM_STATE_RUNTIME_IDLE: EM1 Sleep |
| * PM_STATE_SUSPEND_TO_IDLE: EM2 Deep Sleep |
| * PM_STATE_STANDBY: EM3 Stop |
| * PM_STATE_SOFT_OFF: EM4 |
| */ |
| |
| /* Invoke Low Power/System Off specific Tasks */ |
| __weak void pm_state_set(enum pm_state state, uint8_t substate_id) |
| { |
| ARG_UNUSED(substate_id); |
| |
| LOG_DBG("SoC entering power state %d", state); |
| |
| /* FIXME: When this function is entered the Kernel has disabled |
| * interrupts using BASEPRI register. This is incorrect as it prevents |
| * waking up from any interrupt which priority is not 0. Work around the |
| * issue and disable interrupts using PRIMASK register as recommended |
| * by ARM. |
| */ |
| |
| /* Set PRIMASK */ |
| __disable_irq(); |
| /* Set BASEPRI to 0 */ |
| irq_unlock(0); |
| |
| switch (state) { |
| case PM_STATE_RUNTIME_IDLE: |
| EMU_EnterEM1(); |
| break; |
| case PM_STATE_SUSPEND_TO_IDLE: |
| EMU_EnterEM2(true); |
| break; |
| case PM_STATE_STANDBY: |
| EMU_EnterEM3(true); |
| break; |
| case PM_STATE_SOFT_OFF: |
| EMU_EnterEM4(); |
| break; |
| default: |
| LOG_DBG("Unsupported power state %u", state); |
| break; |
| } |
| |
| LOG_DBG("SoC leaving power state %d", state); |
| |
| /* Clear PRIMASK */ |
| __enable_irq(); |
| } |
| |
| /* Handle SOC specific activity after Low Power Mode Exit */ |
| __weak void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id) |
| { |
| ARG_UNUSED(state); |
| ARG_UNUSED(substate_id); |
| } |