On Tue, Dec 07, 2021 at 10:08:16PM +0100, Jonathan Neuschäfer wrote: > A nuvoton,*-gcr node is present in nuvoton-common-npcm7xx.dtsi and will > be added to nuvoton-wpcm450.dtsi. It is necessary for the NPCM7xx and > WPCM450 pinctrl drivers, and may later be used to retrieve SoC model and > version information. > > This patch adds a binding to describe this node. > > Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@xxxxxxx> > > --- > v2: > - Rename node in example to syscon@800000 > - Add subnode to example > > v1: > - https://lore.kernel.org/lkml/20210602120329.2444672-2-j.neuschaefer@xxxxxxx/ > --- > .../bindings/arm/npcm/nuvoton,gcr.yaml | 45 +++++++++++++++++++ > 1 file changed, 45 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml > > diff --git a/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml b/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml > new file mode 100644 > index 0000000000000..62020d7ac305b > --- /dev/null > +++ b/Documentation/devicetree/bindings/arm/npcm/nuvoton,gcr.yaml > @@ -0,0 +1,45 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/arm/npcm/nuvoton,gcr.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Global Control Registers block in Nuvoton SoCs > + > +maintainers: > + - Jonathan Neuschäfer <j.neuschaefer@xxxxxxx> > + > +description: | Don't need '|' if no formatting. > + The Global Control Registers (GCR) are a block of registers in Nuvoton SoCs > + that expose misc functionality such as chip model and version information or > + pinmux settings. > + > +properties: > + compatible: > + items: > + - enum: > + - nuvoton,wpcm450-gcr > + - nuvoton,npcm750-gcr > + - const: syscon > + - const: simple-mfd blank line > + reg: true Need to define how many entries: maxItems: 1 > + > +required: > + - compatible > + - reg > + > +additionalProperties: false Ideally, you should define the child node names, but you can do this: additionalProperties: type: object which means anything undefined must be a node. > + > +examples: > + - | > + gcr: syscon@800000 { > + compatible = "nuvoton,npcm750-gcr", "syscon", "simple-mfd"; > + reg = <0x800000 0x1000>; > + > + uart-mux-controller { > + compatible = "mmio-mux"; > + #mux-control-cells = <1>; > + mux-reg-masks = <0x38 0x07>; > + idle-states = <2>; > + }; > + }; > -- > 2.30.2 > >
