linux-kernel - [PATCH 5.8 426/633] rtc: ds1307: Clear OSF flag on DS1388 when setting time

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Date:   Tue, 27 Oct 2020 14:52:49 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 426/633] rtc: ds1307: Clear OSF flag on DS1388 when setting time

From: Chris Packham <chris.packham@...iedtelesis.co.nz>

[ Upstream commit f471b05f76e4b1b6ba07ebc7681920a5c5b97c5d ]

Ensure the OSF flag is cleared on the DS1388 when the clock is set.

Fixes: df11b323b16f ("rtc: ds1307: handle oscillator failure flags for ds1388 variant")
Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Link: https://lore.kernel.org/r/20200818013543.4283-1-chris.packham@alliedtelesis.co.nz
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/rtc/rtc-ds1307.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 49702942bb086..70b198423deba 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -352,6 +352,10 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
 		regmap_update_bits(ds1307->regmap, DS1340_REG_FLAG,
 				   DS1340_BIT_OSF, 0);
 		break;
+	case ds_1388:
+		regmap_update_bits(ds1307->regmap, DS1388_REG_FLAG,
+				   DS1388_BIT_OSF, 0);
+		break;
 	case mcp794xx:
 		/*
 		 * these bits were cleared when preparing the date/time
-- 
2.25.1