From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Sat, 14 Dec 2019 23:02:48 +0100
Subject: rtc: pcf8563: remove RTC_VL_CLR handling

Git-commit: d268f4bd42f51813f7335ce36a430de1b27a0bcb
Patch-mainline: v5.6-rc1
References: jsc#SLE-12251

Remove RTC_VL_CLR handling because it is a disservice to userspace as it
removes the important information that the RTC data is invalid. This may
lead userspace to set an invalid system time later on.

Link: https://lore.kernel.org/r/20191214220259.621996-7-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 drivers/rtc/rtc-pcf8563.c |   15 ---------------
 1 file changed, 15 deletions(-)

--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -291,21 +291,6 @@ static int pcf8563_rtc_ioctl(struct devi
 					sizeof(int)))
 			return -EFAULT;
 		return 0;
-	case RTC_VL_CLR:
-		/*
-		 * Clear the VL bit in the seconds register in case
-		 * the time has not been set already (which would
-		 * have cleared it). This does not really matter
-		 * because of the cached voltage_low value but do it
-		 * anyway for consistency.
-		 */
-		if (pcf8563_get_datetime(to_i2c_client(dev), &tm))
-			pcf8563_set_datetime(to_i2c_client(dev), &tm);
-
-		/* Clear the cached value. */
-		pcf8563->voltage_low = 0;
-
-		return 0;
 	default:
 		return -ENOIOCTLCMD;
 	}