Hi Shawn, On Mon, Jul 2, 2018 at 11:06 PM, Shawn Guo <shawnguo@xxxxxxxxxx> wrote: > A second thought on this - shouldn't such dependency be solved by > Kconfig select clause? I suspect we are not able to fix it via Kconfig as we really don't know if a system uses ULPI interface or not via Kconfig perspective. If we always select the chipidea ULPI driver, then it will be dead code for boards that do not use ULPI. Currently there are some defconfigs that explicitly select the chipidea ulpi driver: arch/arm/configs/qcom_defconfig:CONFIG_USB_CHIPIDEA_ULPI=y arch/arm64/configs/defconfig:CONFIG_USB_CHIPIDEA_ULPI=y I would be interested to get feedback whether it would be possible to fix it on a different way. Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html