Re: [PATCH 2/3] dt-bindings: gpio: Convert UniPhier GPIO to json-schema
From: Masahiro Yamada
Date: Sat Feb 22 2020 - 00:37:52 EST
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?
If it is documented somewhere,
could you point me to the reference?
Even if I remove the 'ngpio' entirely
from my dt-schema, the 'ngpio' is checked
> > .../bindings/gpio/gpio-uniphier.txt | 51 -----------
> > .../gpio/socionext,uniphier-gpio.yaml | 89 +++++++++++++++++++
> > MAINTAINERS | 2 +-
> > 3 files changed, 90 insertions(+), 52 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-uniphier.txt
> > create mode 100644 Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.yaml
> My bot found errors running 'make dt_binding_check' on your patch:
> Documentation/devicetree/bindings/display/simple-framebuffer.example.dts:21.16-37.11: Warning (chosen_node_is_root): /example-0/chosen: chosen node must be at root node
> Error: Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.example.dts:38.34-35 syntax error
> FATAL ERROR: Unable to parse input tree
> scripts/Makefile.lib:300: recipe for target 'Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.example.dt.yaml' failed
> make: *** [Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.example.dt.yaml] Error 1
> Makefile:1263: recipe for target 'dt_binding_check' failed
> make: *** [dt_binding_check] Error 2
> See https://patchwork.ozlabs.org/patch/1241747
> Please check and re-submit.
OK, I will.