1 /*
2 * Copyright (c) 2021, NXP
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6 #include <zephyr/kernel.h>
7 #include <zephyr/pm/pm.h>
8 #include "fsl_power.h"
9
10 #include <zephyr/logging/log.h>
11 LOG_MODULE_DECLARE(soc, CONFIG_SOC_LOG_LEVEL);
12
13 /*!< Power down all unnecessary blocks and enable RBB during deep sleep. */
14 #define APP_DEEPSLEEP_RUNCFG0 (SYSCTL0_PDRUNCFG0_LPOSC_PD_MASK | \
15 SYSCTL0_PDSLEEPCFG0_RBB_PD_MASK)
16 #define APP_DEEPSLEEP_RAM_APD 0xFFFFF8U
17 #define APP_DEEPSLEEP_RAM_PPD 0x0U
18 #define APP_EXCLUDE_FROM_DEEPSLEEP \
19 (((const uint32_t[]){APP_DEEPSLEEP_RUNCFG0, \
20 (SYSCTL0_PDSLEEPCFG1_FLEXSPI_SRAM_APD_MASK | \
21 SYSCTL0_PDSLEEPCFG1_FLEXSPI_SRAM_PPD_MASK), \
22 APP_DEEPSLEEP_RAM_APD, APP_DEEPSLEEP_RAM_PPD}))
23
24 /* Invoke Low Power/System Off specific Tasks */
pm_state_set(enum pm_state state,uint8_t substate_id)25 void pm_state_set(enum pm_state state, uint8_t substate_id)
26 {
27 ARG_UNUSED(substate_id);
28
29 /* FIXME: When this function is entered the Kernel has disabled
30 * interrupts using BASEPRI register. This is incorrect as it prevents
31 * waking up from any interrupt which priority is not 0. Work around the
32 * issue and disable interrupts using PRIMASK register as recommended
33 * by ARM.
34 */
35
36 /* Set PRIMASK */
37 __disable_irq();
38 /* Set BASEPRI to 0 */
39 irq_unlock(0);
40
41 switch (state) {
42 case PM_STATE_RUNTIME_IDLE:
43 POWER_EnterSleep();
44 break;
45 case PM_STATE_SUSPEND_TO_IDLE:
46 POWER_EnterDeepSleep(APP_EXCLUDE_FROM_DEEPSLEEP);
47 break;
48 default:
49 LOG_DBG("Unsupported power state %u", state);
50 break;
51 }
52 }
53
54 /* Handle SOC specific activity after Low Power Mode Exit */
pm_state_exit_post_ops(enum pm_state state,uint8_t substate_id)55 void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id)
56 {
57 ARG_UNUSED(state);
58 ARG_UNUSED(substate_id);
59
60 /* Clear PRIMASK */
61 __enable_irq();
62 }
63
