Re: [PATCH] dt-bindings: serial: Describe ARM dcc interface

[Michal Simek]

On 12/22/23 09:20, Krzysztof Kozlowski wrote:
> On 21/12/2023 15:05, Michal Simek wrote:
> > Debug Communication Channel (DCC) provides the way how to pass data between
> > target CPU and host via JTAG interface. Every CPU has own interface for
> > communication via dbgdtrtx_el0 and dbgdtrrx_el0 registers.
> >
> > Signed-off-by: Michal Simek <michal.simek@xxxxxxx>
> > ---
> >
> > This communication interface is used for flash programming on Xilinx
> > SOCs from U-Boot.
> > https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/serial/arm_dcc.c
> >
> > ---
> >   .../devicetree/bindings/serial/arm,dcc.yaml   | 30 +++++++++++++++++++
> >   1 file changed, 30 insertions(+)
> >   create mode 100644 Documentation/devicetree/bindings/serial/arm,dcc.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/serial/arm,dcc.yaml b/Documentation/devicetree/bindings/serial/arm,dcc.yaml
> > new file mode 100644
> > index 000000000000..fd0589356617
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/serial/arm,dcc.yaml
> > @@ -0,0 +1,30 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/serial/arm,dcc.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: ARM DCC (Data communication channel) serial emulation
> > +
> > +maintainers:
> > +  - Michal Simek <michal.simek@xxxxxxx>
> > +
> > +description: |
> > +  ARM DCC (Data communication channel) serial emulation interface available
> > +  via JTAG can be also used as one of serial line tightly coupled with every
> > +  ARM CPU available in the system.
> > +
> > +properties:
> > +  compatible:
> > +    const: arm,dcc
> > +
> > +required:
> > +  - compatible
>
> no allOf: with $ref to serial.yaml? Does it differ somehow?

Valid one could be only nodename format and maybe label.
Others are not relevant. But if that's fine I can also add it.

Thanks,
Michal