threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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*/
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#include <linux/rtc.h>
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#include <linux/time.h>
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/**
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* rtc_set_ntp_time - Save NTP synchronized time to the RTC
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* @now: Current time of day
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*
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* Replacement for the NTP platform function update_persistent_clock64
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* that stores time for later retrieval by rtc_hctosys.
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*
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* Returns 0 on successful RTC update, -ENODEV if a RTC update is not
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* possible at all, and various other -errno for specific temporary failure
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* cases.
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*
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* If temporary failure is indicated the caller should try again 'soon'
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*/
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int rtc_set_ntp_time(struct timespec64 now)
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{
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struct rtc_device *rtc;
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struct rtc_time tm;
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int err = -ENODEV;
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if (now.tv_nsec < (NSEC_PER_SEC >> 1))
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rtc_time64_to_tm(now.tv_sec, &tm);
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else
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rtc_time64_to_tm(now.tv_sec + 1, &tm);
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rtc = rtc_class_open(CONFIG_RTC_SYSTOHC_DEVICE);
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if (rtc) {
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/* rtc_hctosys exclusively uses UTC, so we call set_time here,
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* not set_mmss. */
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if (rtc->ops &&
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(rtc->ops->set_time ||
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rtc->ops->set_mmss64 ||
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rtc->ops->set_mmss))
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err = rtc_set_time(rtc, &tm);
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rtc_class_close(rtc);
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}
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return err;
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}
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