linux-kernel - Re: [PATCH] dt-bindings: serial: renesas,scif: Document R9A09G057 support

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Date: Wed, 6 Mar 2024 08:34:51 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Prabhakar <prabhakar.csengg@...il.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jiri Slaby <jirislaby@...nel.org>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Magnus Damm <magnus.damm@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
 devicetree@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
 Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
 Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH] dt-bindings: serial: renesas,scif: Document R9A09G057
 support

On 05/03/2024 18:16, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Document support for the Serial Communication Interface with FIFO (SCIF)
> available in the Renesas RZ/V2H(P) (R9A09G057) SoC. The SCIF interface in
> the Renesas RZ/V2H(P) is similar to that available in the RZ/G2L
> (R9A07G044) SoC, with the only difference being that the RZ/V2H(P) SoC has
> three additional interrupts: one for Tx end/Rx ready and the other two for
> Rx and Tx buffer full, which are edge-triggered.
> 
> No driver changes are required as generic compatible string
> "renesas,scif-r9a07g044" will be used as a fallback on RZ/V2H(P) SoC.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
> ---
>  .../bindings/serial/renesas,scif.yaml         | 21 +++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/serial/renesas,scif.yaml b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
> index 4610a5bd580c..b2c2305e352c 100644
> --- a/Documentation/devicetree/bindings/serial/renesas,scif.yaml
> +++ b/Documentation/devicetree/bindings/serial/renesas,scif.yaml
> @@ -80,6 +80,7 @@ properties:
>                - renesas,scif-r9a07g043      # RZ/G2UL and RZ/Five
>                - renesas,scif-r9a07g054      # RZ/V2L
>                - renesas,scif-r9a08g045      # RZ/G3S
> +              - renesas,scif-r9a09g057      # RZ/V2H(P)
>            - const: renesas,scif-r9a07g044   # RZ/G2{L,LC} fallback
>  
>    reg:
> @@ -101,6 +102,16 @@ properties:
>            - description: Break interrupt
>            - description: Data Ready interrupt
>            - description: Transmit End interrupt
> +      - items:
> +          - description: Error interrupt
> +          - description: Receive buffer full interrupt
> +          - description: Transmit buffer empty interrupt
> +          - description: Break interrupt
> +          - description: Data Ready interrupt
> +          - description: Transmit End interrupt
> +          - description: Transmit End/Data Ready interrupt
> +          - description: Receive buffer full interrupt (EDGE trigger)
> +          - description: Transmit buffer empty interrupt (EDGE trigger)

You should narrow the choice per variant. Your patch is now saying that
all devices could have 9 interrupts.

Best regards,
Krzysztof