1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #include <assert.h> 8*91f16700Schasinglulu #include <common/debug.h> 9*91f16700Schasinglulu 10*91f16700Schasinglulu #include <mt8173_def.h> 11*91f16700Schasinglulu #include <rtc.h> 12*91f16700Schasinglulu 13*91f16700Schasinglulu void rtc_bbpu_power_down(void) 14*91f16700Schasinglulu { 15*91f16700Schasinglulu uint16_t bbpu; 16*91f16700Schasinglulu 17*91f16700Schasinglulu /* pull PWRBB low */ 18*91f16700Schasinglulu bbpu = RTC_BBPU_KEY | RTC_BBPU_AUTO | RTC_BBPU_PWREN; 19*91f16700Schasinglulu if (Writeif_unlock()) { 20*91f16700Schasinglulu RTC_Write(RTC_BBPU, bbpu); 21*91f16700Schasinglulu if (!RTC_Write_Trigger()) 22*91f16700Schasinglulu assert(0); 23*91f16700Schasinglulu } else { 24*91f16700Schasinglulu assert(0); 25*91f16700Schasinglulu } 26*91f16700Schasinglulu } 27