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149 lines
2.9 KiB
149 lines
2.9 KiB
/*
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* Copyright (c) 2020, MediaTek Inc. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <common/debug.h>
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#include <drivers/delay_timer.h>
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#include <rtc.h>
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static void RTC_Config_Interface(uint32_t addr, uint16_t data,
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uint16_t mask, uint16_t shift)
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{
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uint16_t pmic_reg;
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pmic_reg = RTC_Read(addr);
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pmic_reg &= ~(mask << shift);
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pmic_reg |= (data << shift);
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RTC_Write(addr, pmic_reg);
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}
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static int32_t rtc_disable_2sec_reboot(void)
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{
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uint16_t reboot;
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reboot = (RTC_Read(RTC_AL_SEC) & ~RTC_BBPU_2SEC_EN) &
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~RTC_BBPU_AUTO_PDN_SEL;
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RTC_Write(RTC_AL_SEC, reboot);
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return RTC_Write_Trigger();
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}
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static int32_t rtc_enable_k_eosc(void)
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{
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uint16_t alm_dow, alm_sec;
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int16_t ret;
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/* Turning on eosc cali mode clock */
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RTC_Config_Interface(PMIC_RG_SCK_TOP_CKPDN_CON0_CLR, 1,
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PMIC_RG_RTC_EOSC32_CK_PDN_MASK,
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PMIC_RG_RTC_EOSC32_CK_PDN_SHIFT);
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alm_sec = RTC_Read(RTC_AL_SEC) & (~RTC_LPD_OPT_MASK);
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RTC_Write(RTC_AL_SEC, alm_sec);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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RTC_Write(RTC_CON, RTC_LPD_EN);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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RTC_Write(RTC_CON, RTC_LPD_RST);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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RTC_Write(RTC_CON, RTC_LPD_EN);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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RTC_Write(RTC_POWERKEY1, RTC_POWERKEY1_KEY);
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RTC_Write(RTC_POWERKEY2, RTC_POWERKEY2_KEY);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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/* set RTC EOSC calibration period = 8sec */
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alm_dow = (RTC_Read(RTC_AL_DOW) & (~RTC_RG_EOSC_CALI_TD_MASK)) |
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RTC_RG_EOSC_CALI_TD_8SEC;
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RTC_Write(RTC_AL_DOW, alm_dow);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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RTC_Write(RTC_BBPU,
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RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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/* Enable K EOSC mode :use solution1 of eosc cali to fix mt6359p 32K*/
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RTC_Write(RTC_AL_YEA, (((RTC_Read(RTC_AL_YEA) | RTC_K_EOSC_RSV_0)
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& (~RTC_K_EOSC_RSV_1)) | (RTC_K_EOSC_RSV_2)));
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return 0;
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}
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INFO("[RTC] RTC_enable_k_eosc\n");
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return 1;
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}
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void rtc_power_off_sequence(void)
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{
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uint16_t bbpu;
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int16_t ret;
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ret = rtc_disable_2sec_reboot();
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if (ret == 0) {
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return;
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}
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ret = rtc_enable_k_eosc();
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if (ret == 0) {
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return;
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}
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bbpu = RTC_BBPU_KEY | RTC_BBPU_PWREN;
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if (Writeif_unlock() != 0) {
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RTC_Write(RTC_BBPU,
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bbpu | RTC_BBPU_RESET_ALARM | RTC_BBPU_RESET_SPAR);
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RTC_Write(RTC_AL_MASK, RTC_AL_MASK_DOW);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return;
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}
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mdelay(1);
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bbpu = RTC_Read(RTC_BBPU);
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if (((bbpu & RTC_BBPU_RESET_ALARM) > 0) ||
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((bbpu & RTC_BBPU_RESET_SPAR) > 0)) {
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INFO("[RTC] timeout\n");
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}
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bbpu = RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD;
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RTC_Write(RTC_BBPU, bbpu);
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ret = RTC_Write_Trigger();
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if (ret == 0) {
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return;
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}
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}
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}
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