Patch "hwmon: (adt7411) set bit 3 in CFG1 register" has been added to the 4.4-stable tree

Patch "hwmon: (adt7411) set bit 3 in CFG1 register" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    hwmon: (adt7411) set bit 3 in CFG1 register

to the 4.4-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:
     hwmon-adt7411-set-bit-3-in-cfg1-register.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From b53893aae441a034bf4dbbad42fe218561d7d81f Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@walle.cc>
Date: Tue, 19 Jul 2016 16:43:26 +0200
Subject: hwmon: (adt7411) set bit 3 in CFG1 register

From: Michael Walle <michael@walle.cc>

commit b53893aae441a034bf4dbbad42fe218561d7d81f upstream.

According to the datasheet you should only write 1 to this bit. If it is
not set, at least AIN3 will return bad values on newer silicon revisions.

Fixes: d84ca5b345c2 ("hwmon: Add driver for ADT7411 voltage and temperature sensor")
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hwmon/adt7411.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/hwmon/adt7411.c
+++ b/drivers/hwmon/adt7411.c
@@ -30,6 +30,7 @@
 
 #define ADT7411_REG_CFG1			0x18
 #define ADT7411_CFG1_START_MONITOR		(1 << 0)
+#define ADT7411_CFG1_RESERVED_BIT3		(1 << 3)
 
 #define ADT7411_REG_CFG2			0x19
 #define ADT7411_CFG2_DISABLE_AVG		(1 << 5)
@@ -296,8 +297,10 @@ static int adt7411_probe(struct i2c_clie
 	mutex_init(&data->device_lock);
 	mutex_init(&data->update_lock);
 
+	/* According to the datasheet, we must only write 1 to bit 3 */
 	ret = adt7411_modify_bit(client, ADT7411_REG_CFG1,
-				 ADT7411_CFG1_START_MONITOR, 1);
+				 ADT7411_CFG1_RESERVED_BIT3
+				 | ADT7411_CFG1_START_MONITOR, 1);
 	if (ret < 0)
 		return ret;
 


Patches currently in stable-queue which might be from michael@walle.cc are

queue-4.4/hwmon-adt7411-set-bit-3-in-cfg1-register.patch