Previously, the TMP1075 driver only used the integer part (val1) of the
sensor_value when setting TLOW and THIGH thresholds. This limited the
precision of temperature threshold configuration and could be insufficient
in applications requiring fine-grained control.
This patch adds proper handling for the fractional part (val2) by encoding
it into bits [7:4] of the 12-bit temperature register according to the
TMP1075 datasheet. The decoding logic in get_threshold_attribute() is also
updated to recover the fractional value accurately.
Signed-off-by: Hank Wang <wanghanchi2000@gmail.com>
5379f4a16b