On Wed, Nov 11, 2020 at 10:16:28AM +0100, Krzysztof Kozlowski wrote: > On Wed, Nov 11, 2020 at 12:08:45PM +0300, Serge Semin wrote: > > DWC USB3 DT node is supposed to be compliant with the Generic xHCI > > Controller schema, but with additional vendor-specific properties, the > > controller-specific reference clocks and PHYs. So let's convert the > > currently available legacy text-based DWC USB3 bindings to the DT schema > > and make sure the DWC USB3 nodes are also validated against the > > usb-xhci.yaml schema. > > > > Note we have to discard the nodename restriction of being prefixed with > > "dwc3@" string, since in accordance with the usb-hcd.yaml schema USB nodes > > are supposed to be named as "^usb(@.*)". > > > > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> > > > > --- > > > > Changelog v2: > > - Discard '|' from the descriptions, since we don't need to preserve > > the text formatting in any of them. > > - Drop quotes from around the string constants. > > - Fix the "clock-names" prop description to be referring the enumerated > > clock-names instead of the ones from the Databook. > > > > Changelog v3: > > - Apply usb-xhci.yaml# schema only if the controller is supposed to work > > as either host or otg. > > > > Changelog v4: > > - Apply usb-drd.yaml schema first. If the controller is configured > > to work in a gadget mode only, then apply the usb.yaml schema too, > > otherwise apply the usb-xhci.yaml schema. > > - Discard the Rob'es Reviewed-by tag. Please review the patch one more > > time. > > --- > > .../devicetree/bindings/usb/dwc3.txt | 125 -------- > > .../devicetree/bindings/usb/snps,dwc3.yaml | 303 ++++++++++++++++++ > > 2 files changed, 303 insertions(+), 125 deletions(-) > > delete mode 100644 Documentation/devicetree/bindings/usb/dwc3.txt > > create mode 100644 Documentation/devicetree/bindings/usb/snps,dwc3.yaml > > > > diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt > > deleted file mode 100644 > > index d03edf9d3935..000000000000 > > --- a/Documentation/devicetree/bindings/usb/dwc3.txt > > +++ /dev/null > > @@ -1,125 +0,0 @@ > > -synopsys DWC3 CORE > > - > > -DWC3- USB3 CONTROLLER. Complies to the generic USB binding properties > > - as described in 'usb/generic.txt' > > - > > -Required properties: > > - - compatible: must be "snps,dwc3" > > - - reg : Address and length of the register set for the device > > - - interrupts: Interrupts used by the dwc3 controller. > > - - clock-names: list of clock names. Ideally should be "ref", > > - "bus_early", "suspend" but may be less or more. > > - - clocks: list of phandle and clock specifier pairs corresponding to > > - entries in the clock-names property. > > - > > -Exception for clocks: > > - clocks are optional if the parent node (i.e. glue-layer) is compatible to > > - one of the following: > > - "cavium,octeon-7130-usb-uctl" > > - "qcom,dwc3" > > - "samsung,exynos5250-dwusb3" > > - "samsung,exynos5433-dwusb3" > > - "samsung,exynos7-dwusb3" > > - "sprd,sc9860-dwc3" > > - "st,stih407-dwc3" > > - "ti,am437x-dwc3" > > - "ti,dwc3" > > - "ti,keystone-dwc3" > > - "rockchip,rk3399-dwc3" > > - "xlnx,zynqmp-dwc3" > > What happened with this part of dtschema? It sees you removed it. You meant "bindings", right? I don't think it's a good idea to implement that weak binding in the generic DWC USB3 DT schema. Of course I could have created it under the allOf conditional schema and stuff. But in that case we would have needed to support the clock-related vendor-specific peculiarities in both the generic DWC USB3 DT schema and in the vendor-specific binding files. That wouldn't be that maintainable. As I see it all the vendor-specific clock requirements should be reflected in the glue-node DT schema. The DWC USB3 node binding just declares the clocks as optional. Moreover the DWC USB3 driver also considers them as optional. -Sergey > > Best regards, > Krzysztof
