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authorColin Parker <colin.parker@aclima.io>2017-08-28 16:21:39 -0700
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2017-09-24 16:58:14 +0100
commit4b1f0c31f96c45e8521dd84aae50f2aa4aecfb7b (patch)
tree714847ed4fc10b9c642488d0ce7ded46f3ec6fa8 /drivers/iio
parente6f4794371ee7cce1339e7ca9542f1e703c5f84a (diff)
downloadlinux-4b1f0c31f96c45e8521dd84aae50f2aa4aecfb7b.tar.bz2
IIO: BME280: Updates to Humidity readings need ctrl_reg write!
The ctrl_reg register needs to be written after any write to the humidity registers. The value written to the ctrl_reg register does not necessarily need to change, but a write operation must occur. The regmap_update_bits functions will not write to a register if the register value matches the value to be written. This saves unnecessary bus operations. The change in this patch forces a bus write during the chip_config operation by switching to regmap_write_bits. This will fix issues where the Humidity Sensor Oversampling bits are not updated after initialization. Signed-off-by: Colin Parker <colin.parker@aclima.io> Acked-by: Andreas Klinger <ak@it-klinger.de> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/pressure/bmp280-core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index d82b788374b6..e442c5248427 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -558,7 +558,7 @@ static int bmp280_chip_config(struct bmp280_data *data)
u8 osrs = BMP280_OSRS_TEMP_X(data->oversampling_temp + 1) |
BMP280_OSRS_PRESS_X(data->oversampling_press + 1);
- ret = regmap_update_bits(data->regmap, BMP280_REG_CTRL_MEAS,
+ ret = regmap_write_bits(data->regmap, BMP280_REG_CTRL_MEAS,
BMP280_OSRS_TEMP_MASK |
BMP280_OSRS_PRESS_MASK |
BMP280_MODE_MASK,