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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Oct 14, 2020 at 05:09:37PM +0300, Felipe Balbi wrote: > > Hi Serge, > > Serge Semin writes: > > In accordance with the DWC USB3 bindings the corresponding node name is > > suppose to comply with Generic USB HCD DT schema, which requires the USB > > DWC3 is not a simple HDC, though. Yeah, strictly speaking it is equipped with a lot of vendor-specific stuff, which are tuned by the DWC USB3 driver in the kernel. But after that the controller is registered as xhci-hcd device so it's serviced by the xHCI driver, which then registers the HCD device so the corresponding DT node is supposed to be compatible with the next bindings: usb/usb-hcd.yaml, usb/usb-xhci.yaml and usb/snps,dwc3,yaml. I've created the later one so to validate the denoted compatibility. > > > nodes to have the name acceptable by the regexp: "^usb(@.*)?" . But a lot > > of the DWC USB3-compatible nodes defined in the ARM/ARM64 DTS files have > > name as "^dwc3@.*" or "^usb[1-3]@.*" or even "^dwusb@.*", which will cause > > the dtbs_check procedure failure. Let's fix the nodes naming to be > > compatible with the DWC USB3 DT schema to make dtbs_check happy. > > > > Note we don't change the DWC USB3-compatible nodes names of > > arch/arm64/boot/dts/apm/{apm-storm.dtsi,apm-shadowcat.dtsi} since the > > in-source comment says that the nodes name need to be preserved as > > "^dwusb@.*" for some backward compatibility. > > interesting, compatibility with what? Some debugfs files, perhaps? :-) Don't really know.) In my experience the worst type of such compatibility is connected with some bootloader magic, which may add/remove/modify properties to nodes with pre-defined names. -Sergey > > In any case, I don't have any problems with this, so I'll let other > folks comment. > > -- > balbi _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel