add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rtc/rtc-mrst.c
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@@ -1,14 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * rtc-mrst.c: Driver for Moorestown virtual RTC
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  *
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  * (C) Copyright 2009 Intel Corporation
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  * Author: Jacob Pan (jacob.jun.pan@intel.com)
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  *	   Feng Tang (feng.tang@intel.com)
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; version 2
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- * of the License.
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  *
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  * Note:
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  * VRTC is emulated by system controller firmware, the real HW
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@@ -90,7 +86,7 @@
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 	unsigned long flags;
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 	if (vrtc_is_updating())
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-		mdelay(20);
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+		msleep(20);
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 	spin_lock_irqsave(&rtc_lock, flags);
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 	time->tm_sec = vrtc_cmos_read(RTC_SECONDS);
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@@ -261,11 +257,10 @@
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 static int mrst_procfs(struct device *dev, struct seq_file *seq)
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 {
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-	unsigned char	rtc_control, valid;
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+	unsigned char	rtc_control;
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 	spin_lock_irq(&rtc_lock);
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 	rtc_control = vrtc_cmos_read(RTC_CONTROL);
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-	valid = vrtc_cmos_read(RTC_VALID);
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 	spin_unlock_irq(&rtc_lock);
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 	seq_printf(seq,