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@xxxxxxxxxxxxxxx> know about it.
>From b53893aae441a034bf4dbbad42fe218561d7d81f Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@xxxxxxxx>
Date: Tue, 19 Jul 2016 16:43:26 +0200
Subject: hwmon: (adt7411) set bit 3 in CFG1 register
From: Michael Walle <michael@xxxxxxxx>
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@xxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxx are
queue-4.4/hwmon-adt7411-set-bit-3-in-cfg1-register.patch
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