AD74115_OUTPUT_SLEW_LIN_STEP_MASK
step_val = FIELD_GET(AD74115_OUTPUT_SLEW_LIN_STEP_MASK, tmp);
mask |= AD74115_OUTPUT_SLEW_LIN_STEP_MASK;
tmp |= FIELD_PREP(AD74115_OUTPUT_SLEW_LIN_STEP_MASK, step_val);