EC_ADDR_EXTENT
if (!devm_request_region(dev, EC_BASE_ADDR, EC_ADDR_EXTENT, dev_name(dev))) {
EC_BASE_ADDR, EC_BASE_ADDR + EC_ADDR_EXTENT);
if (!request_region(EC_BASE_ADDR, EC_ADDR_EXTENT, DRIVER_NAME))
release_region(EC_BASE_ADDR, EC_ADDR_EXTENT);