RE: [PATCH v2 5/6] dt-bindings: serial: cdns: Add new compatible string for StarFive JH8100 UART

[JeeHeng Sia <jeeheng.sia@starfivetech.com>]

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Sent: Wednesday, November 29, 2023 4:26 PM
> To: JeeHeng Sia <jeeheng.sia@starfivetech.com>; kernel@esmil.dk; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org;
> krzk@kernel.org; conor+dt@kernel.org; paul.walmsley@sifive.com; palmer@dabbelt.com; aou@eecs.berkeley.edu;
> daniel.lezcano@linaro.org; tglx@linutronix.de; conor@kernel.org; anup@brainfault.org; gregkh@linuxfoundation.org;
> jirislaby@kernel.org; michal.simek@amd.com; Michael Zhu <michael.zhu@starfivetech.com>; drew@beagleboard.org
> Cc: devicetree@vger.kernel.org; linux-riscv@lists.infradead.org; linux-kernel@vger.kernel.org; Leyfoon Tan
> <leyfoon.tan@starfivetech.com>
> Subject: Re: [PATCH v2 5/6] dt-bindings: serial: cdns: Add new compatible string for StarFive JH8100 UART
> 
> On 29/11/2023 07:00, Sia Jee Heng wrote:
> > Add new compatible string for UART in the StarFive JH8100 SoC.
> >
> > Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
> > Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
> 
> The patch is quite different than v1. Are you sure the review is
> applicable? If it was given for v2, where is it?
This patch is impacted by the comment suggesting the exclusion of patch 5 in V1. In V2, this patch adds compatible for cdns-uart-r1p8, allowing us to continue using the cdns uart.
> 
> > ---
> >  Documentation/devicetree/bindings/serial/cdns,uart.yaml | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.yaml b/Documentation/devicetree/bindings/serial/cdns,uart.yaml
> > index e35ad1109efc..0d05305778f2 100644
> > --- a/Documentation/devicetree/bindings/serial/cdns,uart.yaml
> > +++ b/Documentation/devicetree/bindings/serial/cdns,uart.yaml
> > @@ -20,6 +20,10 @@ properties:
> >          items:
> >            - const: xlnx,zynqmp-uart
> >            - const: cdns,uart-r1p12
> > +      - description: UART controller for StarFive JH8100 SoC
> 
> This is duplicating compatible, drop.
Do you mean drop compatible for starfive,jh8100-uart ?
> 
> > +        items:
> > +          - const: starfive,jh8100-uart
> > +          - const: cdns,uart-r1p8
> 
> Don't add things to the end of the list, but keep order. I would suggest
> to put it at the beginning, so before Xilinx.
I'm trying to get what you're asking, but it's a bit confusing for me. So, I thought it might be easier if I just share the code below. Please let me know if this addresses your comment?
properties:
  compatible:
    oneOf:
      - description: UART controller for StarFive JH8100 SoC
        items:
          - const: cdns,uart-r1p8
      - description: UART controller for Zynq-7xxx SoC
        items:
          - const: xlnx,xuartps
          - const: cdns,uart-r1p8
      - description: UART controller for Zynq Ultrascale+ MPSoC
        items:
          - const: xlnx,zynqmp-uart
          - const: cdns,uart-r1p12
> 
> 
> Best regards,
> Krzysztof