linux-kernel - Re: [PATCH 4/6] dt-bindings: serial: amlogic, meson-uart: support T7

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Date:   Thu, 15 Jun 2023 22:25:09 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Lucas Tanure <tanure@...ux.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Nick <nick@...das.com>, Artem <art@...das.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 4/6] dt-bindings: serial: amlogic, meson-uart: support T7

On Thu, Jun 15, 2023 at 07:29:36PM +0100, Lucas Tanure wrote:
> Add serial bindings support menson T7 SoC family.
> 
> Signed-off-by: Lucas Tanure <tanure@...ux.com>
> ---
>  Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
> index 01ec45b3b406..01b01f8840ea 100644
> --- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
> +++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
> @@ -46,6 +46,7 @@ properties:
>            - amlogic,meson8b-uart
>            - amlogic,meson-gx-uart
>            - amlogic,meson-s4-uart
> +          - amlogic,meson-t7-uart

| diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
| index 2501db5a7aaf..0208f9a6ba7e 100644
| --- a/drivers/tty/serial/meson_uart.c
| +++ b/drivers/tty/serial/meson_uart.c
| @@ -796,6 +796,10 @@ static const struct of_device_id meson_uart_dt_match[] = {
|                 .compatible = "amlogic,meson-s4-uart",
|                 .data = (void *)&meson_g12a_uart_data,
|         },
| +       {
| +               .compatible = "amlogic,meson-t7-uart",
| +               .data = (void *)&meson_g12a_uart_data,
| +       },
|         { /* sentinel */ },
|  };
|  MODULE_DEVICE_TABLE(of, meson_uart_dt_match);

You're adding another element to this enum, but the driver change
implies compatibility with the s4 uart. Should you not set this up with
fallback compatibles?

Cheers,
Conor.

>        - description: Everything-Else power domain UART controller on G12A SoCs
>          items:
>            - const: amlogic,meson-g12a-uart
> --
> 2.41.0
> 

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