From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:13:47 +0200 Subject: Adding upstream version 2.8.0+dfsg. Signed-off-by: Daniel Baumann --- plat/mediatek/drivers/rtc/rtc_mt6359p.c | 148 ++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 plat/mediatek/drivers/rtc/rtc_mt6359p.c (limited to 'plat/mediatek/drivers/rtc/rtc_mt6359p.c') diff --git a/plat/mediatek/drivers/rtc/rtc_mt6359p.c b/plat/mediatek/drivers/rtc/rtc_mt6359p.c new file mode 100644 index 0000000..3bf4337 --- /dev/null +++ b/plat/mediatek/drivers/rtc/rtc_mt6359p.c @@ -0,0 +1,148 @@ +/* + * Copyright (c) 2020-2022, MediaTek Inc. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include +#include + + +static void RTC_Config_Interface(uint32_t addr, uint16_t data, + uint16_t mask, uint16_t shift) +{ + uint16_t pmic_reg; + + pmic_reg = RTC_Read(addr); + + pmic_reg &= ~(mask << shift); + pmic_reg |= (data << shift); + + RTC_Write(addr, pmic_reg); +} + +static int32_t rtc_disable_2sec_reboot(void) +{ + uint16_t reboot; + + reboot = (RTC_Read(RTC_AL_SEC) & ~RTC_BBPU_2SEC_EN) & + ~RTC_BBPU_AUTO_PDN_SEL; + RTC_Write(RTC_AL_SEC, reboot); + + return RTC_Write_Trigger(); +} + +static int32_t rtc_enable_k_eosc(void) +{ + uint16_t alm_dow, alm_sec; + int16_t ret; + + /* Turning on eosc cali mode clock */ + RTC_Config_Interface(PMIC_RG_SCK_TOP_CKPDN_CON0_CLR, 1, + PMIC_RG_RTC_EOSC32_CK_PDN_MASK, + PMIC_RG_RTC_EOSC32_CK_PDN_SHIFT); + + alm_sec = RTC_Read(RTC_AL_SEC) & (~RTC_LPD_OPT_MASK); + RTC_Write(RTC_AL_SEC, alm_sec); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + RTC_Write(RTC_CON, RTC_LPD_EN); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + RTC_Write(RTC_CON, RTC_LPD_RST); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + RTC_Write(RTC_CON, RTC_LPD_EN); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + RTC_Write(RTC_POWERKEY1, RTC_POWERKEY1_KEY); + RTC_Write(RTC_POWERKEY2, RTC_POWERKEY2_KEY); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + /* set RTC EOSC calibration period = 8sec */ + alm_dow = (RTC_Read(RTC_AL_DOW) & (~RTC_RG_EOSC_CALI_TD_MASK)) | + RTC_RG_EOSC_CALI_TD_8SEC; + RTC_Write(RTC_AL_DOW, alm_dow); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + RTC_Write(RTC_BBPU, + RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + /* Enable K EOSC mode :use solution1 of eosc cali to fix mt6359p 32K*/ + RTC_Write(RTC_AL_YEA, (((RTC_Read(RTC_AL_YEA) | RTC_K_EOSC_RSV_0) + & (~RTC_K_EOSC_RSV_1)) | (RTC_K_EOSC_RSV_2))); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return 0; + } + + INFO("[RTC] RTC_enable_k_eosc\n"); + + return 1; +} + +void rtc_power_off_sequence(void) +{ + uint16_t bbpu; + int16_t ret; + + ret = rtc_disable_2sec_reboot(); + if (ret == 0) { + return; + } + + ret = rtc_enable_k_eosc(); + if (ret == 0) { + return; + } + + bbpu = RTC_BBPU_KEY | RTC_BBPU_PWREN; + + if (Writeif_unlock() != 0) { + RTC_Write(RTC_BBPU, + bbpu | RTC_BBPU_RESET_ALARM | RTC_BBPU_RESET_SPAR); + RTC_Write(RTC_AL_MASK, RTC_AL_MASK_DOW); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return; + } + mdelay(1); + + bbpu = RTC_Read(RTC_BBPU); + + if (((bbpu & RTC_BBPU_RESET_ALARM) > 0) || + ((bbpu & RTC_BBPU_RESET_SPAR) > 0)) { + INFO("[RTC] timeout\n"); + } + + bbpu = RTC_Read(RTC_BBPU) | RTC_BBPU_KEY | RTC_BBPU_RELOAD; + RTC_Write(RTC_BBPU, bbpu); + ret = RTC_Write_Trigger(); + if (ret == 0) { + return; + } + } +} -- cgit v1.2.3