From: Ian Abbott <abbotti@mev.co.uk>
Date: Thu, 27 Oct 2022 16:32:49 +0000 (+0100)
Subject: rtc: ds1347: fix value written to century register
X-Git-Tag: v6.0.18~92
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f218aab2eacb9a77e11b90c9ecc5b75bc739052;p=thirdparty%2Fkernel%2Fstable.git

rtc: ds1347: fix value written to century register

commit 4dfe05bdc1ade79b943d4979a2e2a8b5ef68fbb5 upstream.

In `ds1347_set_time()`, the wrong value is being written to the
`DS1347_CENTURY_REG` register.  It needs to be converted to BCD.  Fix
it.

Fixes: 147dae76dbb9 ("rtc: ds1347: handle century register")
Cc: <stable@vger.kernel.org> # v5.5+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20221027163249.447416-1-abbotti@mev.co.uk
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/rtc/rtc-ds1347.c b/drivers/rtc/rtc-ds1347.c
index 157bf5209ac40..a40c1a52df659 100644
--- a/drivers/rtc/rtc-ds1347.c
+++ b/drivers/rtc/rtc-ds1347.c
@@ -112,7 +112,7 @@ static int ds1347_set_time(struct device *dev, struct rtc_time *dt)
 		return err;
 
 	century = (dt->tm_year / 100) + 19;
-	err = regmap_write(map, DS1347_CENTURY_REG, century);
+	err = regmap_write(map, DS1347_CENTURY_REG, bin2bcd(century));
 	if (err)
 		return err;