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3374752fc1
We plan to put some soc related drivers in common/drivers. To reduce confision, we move them to plat/mediatek. Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com> Change-Id: I6b344e660f40a23b15151aab073d3045b28f52aa
64 lines
1.1 KiB
C
64 lines
1.1 KiB
C
/*
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* Copyright (c) 2019-2022, 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 <pmic_wrap_init.h>
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#include <rtc.h>
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/* RTC busy status polling interval and retry count */
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enum {
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RTC_WRTGR_POLLING_DELAY_MS = 10,
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RTC_WRTGR_POLLING_CNT = 100
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};
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uint16_t RTC_Read(uint32_t addr)
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{
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uint32_t rdata = 0;
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pwrap_read((uint32_t)addr, &rdata);
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return (uint16_t)rdata;
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}
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void RTC_Write(uint32_t addr, uint16_t data)
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{
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pwrap_write((uint32_t)addr, (uint32_t)data);
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}
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int32_t rtc_busy_wait(void)
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{
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uint64_t retry = RTC_WRTGR_POLLING_CNT;
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do {
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mdelay(RTC_WRTGR_POLLING_DELAY_MS);
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if (!(RTC_Read(RTC_BBPU) & RTC_BBPU_CBUSY))
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return 1;
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retry--;
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} while (retry);
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ERROR("[RTC] rtc cbusy time out!\n");
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return 0;
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}
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int32_t RTC_Write_Trigger(void)
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{
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RTC_Write(RTC_WRTGR, 1);
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return rtc_busy_wait();
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}
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int32_t Writeif_unlock(void)
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{
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RTC_Write(RTC_PROT, RTC_PROT_UNLOCK1);
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if (!RTC_Write_Trigger())
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return 0;
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RTC_Write(RTC_PROT, RTC_PROT_UNLOCK2);
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if (!RTC_Write_Trigger())
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return 0;
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return 1;
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}
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