This is a note to let you know that I've just added the patch titled
iio: hudmidity: hdc100x: fix incorrect shifting and scaling
to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From 94bef000f1d4aa111f4ddda1482cf3b30ad069ce Mon Sep 17 00:00:00 2001
From: Matt Ranostay <mranostay@xxxxxxxxx>
Date: Sun, 29 May 2016 19:52:02 -0700
Subject: iio: hudmidity: hdc100x: fix incorrect shifting and scaling
Shifting sensor data to the right 2 bits was incorrect and caused the
scaling values + offsets to be invalid.
Reported-by: Alison Schofield <amsfield22@xxxxxxxxx>
Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx>
Tested-by: Alison Schofield <amsfield22@xxxxxxxxx>
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/iio/humidity/hdc100x.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/humidity/hdc100x.c b/drivers/iio/humidity/hdc100x.c
index 30709838dcdc..a03832a5fc95 100644
--- a/drivers/iio/humidity/hdc100x.c
+++ b/drivers/iio/humidity/hdc100x.c
@@ -164,14 +164,14 @@ static int hdc100x_get_measurement(struct hdc100x_data *data,
dev_err(&client->dev, "cannot read high byte measurement");
return ret;
}
- val = ret << 6;
+ val = ret << 8;
ret = i2c_smbus_read_byte(client);
if (ret < 0) {
dev_err(&client->dev, "cannot read low byte measurement");
return ret;
}
- val |= ret >> 2;
+ val |= ret;
return val;
}
@@ -212,17 +212,17 @@ static int hdc100x_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_SCALE:
if (chan->type == IIO_TEMP) {
*val = 165000;
- *val2 = 65536 >> 2;
+ *val2 = 65536;
return IIO_VAL_FRACTIONAL;
} else {
- *val = 0;
- *val2 = 10000;
- return IIO_VAL_INT_PLUS_MICRO;
+ *val = 100;
+ *val2 = 65536;
+ return IIO_VAL_FRACTIONAL;
}
break;
case IIO_CHAN_INFO_OFFSET:
- *val = -3971;
- *val2 = 879096;
+ *val = -15887;
+ *val2 = 515151;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
--
2.8.3
--
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