HPC3130_ATTEN
if (hpc3130_read(handle, HPC3130_ATTEN, slot, &old) != DDI_SUCCESS) {
if (hpc3130_write(handle, HPC3130_ATTEN, slot, new) != DDI_SUCCESS) {
if (hpc3130_read(handle, HPC3130_ATTEN, slot, &temp) != DDI_SUCCESS) {