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authorChris Lesiak2015-11-02 15:45:03 -0600
committerJonathan Cameron2015-11-15 12:36:19 +0000
commit0d2f6fd3ffd5e7a447233a57112246bc00064752 (patch)
tree8c5882a3e9f69597589d048c9a56dc4d37b0c8fb /drivers/iio/humidity
parent8546d2e5b15e454d2d492a1e9625732980e8eb26 (diff)
iio: si7020: Swap data byte order
The Silicon Labs Si7013, Si7020, and Si7021 family of I2C humidity and temperature sensors deliver 16 bit data high byte first. See the datasheet available at: https://www.silabs.com/Support%20Documents%2fTechnicalDocs%2fSi7020-A20.pdf But as documented in Documentation/i2c/smbus-protocol, i2c_smbus_read_word_data() expects the low byte first. Change the driver to use i2c_smbus_read_word_swapped to get correct byte order. Signed-off-by: Chris Lesiak <chris.lesiak@licor.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/humidity')
-rw-r--r--drivers/iio/humidity/si7020.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/iio/humidity/si7020.c b/drivers/iio/humidity/si7020.c
index fa3b809aff5e..1b6935d99100 100644
--- a/drivers/iio/humidity/si7020.c
+++ b/drivers/iio/humidity/si7020.c
@@ -50,10 +50,10 @@ static int si7020_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
- ret = i2c_smbus_read_word_data(*client,
- chan->type == IIO_TEMP ?
- SI7020CMD_TEMP_HOLD :
- SI7020CMD_RH_HOLD);
+ ret = i2c_smbus_read_word_swapped(*client,
+ chan->type == IIO_TEMP ?
+ SI7020CMD_TEMP_HOLD :
+ SI7020CMD_RH_HOLD);
if (ret < 0)
return ret;
*val = ret >> 2;