This is a note to let you know that I've just added the patch titled
rtc: rzn1: fix BCD to rtc_time conversion errors
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtc-rzn1-fix-bcd-to-rtc_time-conversion-errors.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7ce700fd92a3bb1e8079d1a8370b6b4bff9877f7
Author: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Date: Wed Nov 13 12:30:32 2024 +0100
rtc: rzn1: fix BCD to rtc_time conversion errors
[ Upstream commit 55727188dfa3572aecd946e58fab9e4a64f06894 ]
tm_mon describes months from 0 to 11, but the register contains BCD from
1 to 12. tm_year contains years since 1900, but the BCD contains 20XX.
Apply the offsets when converting these numbers.
Fixes: deeb4b5393e1 ("rtc: rzn1: Add new RTC driver")
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241113113032.27409-1-wsa+renesas@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/rtc/rtc-rzn1.c b/drivers/rtc/rtc-rzn1.c
index 56ebbd4d04814..8570c8e63d70c 100644
--- a/drivers/rtc/rtc-rzn1.c
+++ b/drivers/rtc/rtc-rzn1.c
@@ -111,8 +111,8 @@ static int rzn1_rtc_read_time(struct device *dev, struct rtc_time *tm)
tm->tm_hour = bcd2bin(tm->tm_hour);
tm->tm_wday = bcd2bin(tm->tm_wday);
tm->tm_mday = bcd2bin(tm->tm_mday);
- tm->tm_mon = bcd2bin(tm->tm_mon);
- tm->tm_year = bcd2bin(tm->tm_year);
+ tm->tm_mon = bcd2bin(tm->tm_mon) - 1;
+ tm->tm_year = bcd2bin(tm->tm_year) + 100;
return 0;
}
@@ -128,8 +128,8 @@ static int rzn1_rtc_set_time(struct device *dev, struct rtc_time *tm)
tm->tm_hour = bin2bcd(tm->tm_hour);
tm->tm_wday = bin2bcd(rzn1_rtc_tm_to_wday(tm));
tm->tm_mday = bin2bcd(tm->tm_mday);
- tm->tm_mon = bin2bcd(tm->tm_mon);
- tm->tm_year = bin2bcd(tm->tm_year);
+ tm->tm_mon = bin2bcd(tm->tm_mon + 1);
+ tm->tm_year = bin2bcd(tm->tm_year - 100);
val = readl(rtc->base + RZN1_RTC_CTL2);
if (!(val & RZN1_RTC_CTL2_STOPPED)) {
