On Fri, Feb 21, 2020 at 11:33 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote: > > Hi Rob, > > On Sat, Feb 22, 2020 at 12:32 AM Rob Herring <robh@xxxxxxxxxx> wrote: > > > > On Fri, 21 Feb 2020 11:10:01 +0900, Masahiro Yamada wrote: > > > Convert the UniPhier GPIO controller binding to DT schema format. > > > > > > I omitted the 'gpio-ranges' property because it is defined in the > > > dt-schema project (/schemas/gpio/gpio.yaml). > > > > > > As of writing, the 'gpio-ranges-group-names' is not defined in that > > > file despite it is a common property described in > > > Documentation/devicetree/bindings/gpio/gpio.txt > > > So, I defined it in this schema. > > > > > > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> > > > --- > > > > > > I have a question about the range about 'ngpio'. > > > > > > ngpios: > > > minimum: 0 > > > maximum: 512 > > > > > > The 'ngpio' property is already defined as 'uint32' in the dt-schema tool: > > > https://github.com/robherring/dt-schema/blob/master/schemas/gpio/gpio.yaml#L20 > > > > > > 'uint32' is unsigned, so 'minimum: 0' looks too obvious. > > > > > > I cannot omit the minimum because minimum and maximum depend on each other. > > > I just put a sensible number, 512, in maximum. > > > > > > If this range is entirely unneeded, I will delete it. > > > > This property is generally for when you can have some number less > > than a maximum number implied by the compatible string. > > > > If there is really no max (e.g. 2^32 - 1 is valid), then just do > > 'ngpios: true' > > > What does ': true' mean? It's a schema that always passes validation. It's purpose here is just to say you are using this common property for this binding. > > If it is documented somewhere, > could you point me to the reference? https://github.com/devicetree-org/dt-schema/blob/master/schemas/gpio/gpio.yaml > > Even if I remove the 'ngpio' entirely > from my dt-schema, the 'ngpio' is checked > correctly. Yes, if you change it to a string value for example, it should fail. (Only if DT_SCHEMA_FILES is not set without my kbuild changes) You should also add 'additionalProperties: false' at the top level of your schema and then it will also fail if you don't list ngpios in properties. Rob
