twl6030_gpadc_write
return twl6030_gpadc_write(TWL6030_GPADC_CTRL_P1,
ret = twl6030_gpadc_write(TWL6032_GPADC_GPSELECT_ISB, channel);
return twl6030_gpadc_write(TWL6032_GPADC_CTRL_P1,