Hi, > > + > > + data = devm_kzalloc(bg_ptr->dev, sizeof(*data), GFP_KERNEL); > > + if (!data) { > > + dev_err(bg_ptr->dev, "kzalloc fail\n"); > > + return -ENOMEM; > > + } > > + data->sensor_id = id; > > + data->bg_ptr = bg_ptr; > > + data->omap4_thermal = thermal_zone_device_register(domain, 0, > > + data, &omap4_thermal_ops, 0, 0, 0, 0); Please watch out for changes on this API. The third argument is the flag for writeable trip points. This patch is in linux-next. So, kindly have a look at this API implementation in thermal_sys.c in linux-next, when you submit this patch next time. Thanks, Durga