diff options
Diffstat (limited to 'plat/nvidia/tegra/common/tegra_pm.c')
| -rw-r--r-- | plat/nvidia/tegra/common/tegra_pm.c | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/plat/nvidia/tegra/common/tegra_pm.c b/plat/nvidia/tegra/common/tegra_pm.c index 5376d523..d6329268 100644 --- a/plat/nvidia/tegra/common/tegra_pm.c +++ b/plat/nvidia/tegra/common/tegra_pm.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: @@ -49,6 +49,14 @@ extern uint64_t tegra_sec_entry_point; extern uint64_t tegra_console_base; /* + * tegra_fake_system_suspend acts as a boolean var controlling whether + * we are going to take fake system suspend code or normal system suspend code + * path. This variable is set inside the sip call handlers,when the kernel + * requests a SIP call to set the suspend debug flags. + */ +uint8_t tegra_fake_system_suspend; + +/* * The following platform setup functions are weakly defined. They * provide typical implementations that will be overridden by a SoC. */ @@ -182,14 +190,31 @@ void tegra_pwr_domain_suspend(const psci_power_state_t *target_state) __dead2 void tegra_pwr_domain_power_down_wfi(const psci_power_state_t *target_state) { + uint8_t pwr_state = target_state->pwr_domain_state[PLAT_MAX_PWR_LVL]; + uint64_t rmr_el3 = 0; + /* call the chip's power down handler */ tegra_soc_pwr_domain_power_down_wfi(target_state); - /* enter power down state */ - wfi(); + /* + * If we are in fake system suspend mode, ensure we start doing + * procedures that help in looping back towards system suspend exit + * instead of calling WFI by requesting a warm reset. + * Else, just call WFI to enter low power state. + */ + if ((tegra_fake_system_suspend != 0U) && + (pwr_state == (uint8_t)PSTATE_ID_SOC_POWERDN)) { + + /* warm reboot */ + rmr_el3 = read_rmr_el3(); + write_rmr_el3(rmr_el3 | RMR_WARM_RESET_CPU); + + } else { + /* enter power down state */ + wfi(); + } /* we can never reach here */ - ERROR("%s: operation not handled.\n", __func__); panic(); } |