compute_intercept_slope
compute_intercept_slope(priv, p1, NULL, ONE_PT_CALIB);
compute_intercept_slope(priv, p1, p2, mode);
compute_intercept_slope(priv, p1, p2, mode);
compute_intercept_slope(priv, p1, p2, mode);
compute_intercept_slope(priv, p1, p2, mode);
compute_intercept_slope(priv, p1, p2, mode);
void compute_intercept_slope(struct tsens_priv *priv, u32 *pt1, u32 *pt2, u32 mode);