P8
var4 = ((s64)calib->P8 * var3) >> 5;
calib->P8 = data->bmp380_cal_buf[BMP380_P8];
calib->P8 = le16_to_cpu(data->bmp280_cal_buf[P8]);
var2 = ((s64)(calib->P8) * p) >> 19;
s16 P8;
s8 P8;