From: Marek Vasut <marex@denx.de>
To: linux-rtc@vger.kernel.org
Cc: Marek Vasut <marex@denx.de>, Arnaud Ebalard <arno@natisbad.org>,
Alexandre Belloni <alexandre.belloni@free-electrons.com>,
Bastian Krause <bst@pengutronix.de>
Subject: [PATCH V2] rtc: ds1307: Enable battery backup on RX8130
Date: Thu, 5 Sep 2019 15:03:36 +0200 [thread overview]
Message-ID: <20190905130336.10651-1-marex@denx.de> (raw)
The battery backup can be disabled on this RTC, e.g. if populated right
out of production. Force the battery backup bit on to enable it.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Arnaud Ebalard <arno@natisbad.org>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Bastian Krause <bst@pengutronix.de>
---
V2: Drop the custom offset, let regmap handle that
---
drivers/rtc/rtc-ds1307.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 1f7e8aefc1eb..f2d1e59478c2 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -121,6 +121,8 @@ enum ds_type {
#define RX8130_REG_FLAG_AF BIT(3)
#define RX8130_REG_CONTROL0 0x1e
#define RX8130_REG_CONTROL0_AIE BIT(3)
+#define RX8130_REG_CONTROL1 0x1f
+#define RX8130_REG_CONTROL1_INIEN BIT(4)
#define MCP794XX_REG_CONTROL 0x07
# define MCP794XX_BIT_ALM0_EN 0x10
@@ -1750,6 +1752,11 @@ static int ds1307_probe(struct i2c_client *client,
DS1307_REG_HOUR << 4 | 0x08, hour);
}
break;
+ case rx_8130:
+ /* make sure that the backup battery is enabled */
+ regmap_write(ds1307->regmap, RX8130_REG_CONTROL1,
+ RX8130_REG_CONTROL1_INIEN);
+ break;
default:
break;
}
--
2.23.0.rc1
next reply other threads:[~2019-09-05 13:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 13:03 Marek Vasut [this message]
2019-11-21 8:09 ` [PATCH V2] rtc: ds1307: Enable battery backup on RX8130 Bastian Krause
2019-11-21 8:14 ` Marek Vasut
2019-11-21 8:21 ` Bastian Krause
2019-11-21 8:28 ` Marek Vasut
2019-11-21 16:39 ` Alexandre Belloni
2019-11-22 9:48 ` Bastian Krause
2019-12-16 11:17 ` Bastian Krause
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