linux-kernel - Re: [PATCH v2 2/7] dt-bindings: can: mpfs: add missing required clock

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Date: Mon, 22 Jan 2024 14:13:16 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Conor Dooley <conor@...nel.org>
Cc: linux-riscv@...ts.infradead.org, 
	Conor Dooley <conor.dooley@...rochip.com>, Daire McNamara <daire.mcnamara@...rochip.com>, 
	Wolfgang Grandegger <wg@...ndegger.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, linux-can@...r.kernel.org, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 2/7] dt-bindings: can: mpfs: add missing required clock

On 22.01.2024 12:19:50, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> The CAN controller on PolarFire SoC has an AHB peripheral clock _and_ a
> CAN bus clock. The bus clock was omitted when the binding was written,
> but is required for operation. Make up for lost time and add it.
> 
> Cautionary tale in adding bindings without having implemented a real
> user for them perhaps.
> 
> Fixes: c878d518d7b6 ("dt-bindings: can: mpfs: document the mpfs CAN controller")
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
>  .../devicetree/bindings/net/can/microchip,mpfs-can.yaml     | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml b/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml
> index 45aa3de7cf01..01e4d4a54df6 100644
> --- a/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml
> +++ b/Documentation/devicetree/bindings/net/can/microchip,mpfs-can.yaml
> @@ -24,7 +24,9 @@ properties:
>      maxItems: 1
>  
>    clocks:
> -    maxItems: 1
> +    items:
> +      - description: AHB peripheral clock
> +      - description: CAN bus clock

What about adding clock-names, so that the order can be checked
automatically?

>  
>  required:
>    - compatible
> @@ -39,7 +41,7 @@ examples:
>      can@...0c000 {
>          compatible = "microchip,mpfs-can";
>          reg = <0x2010c000 0x1000>;
> -        clocks = <&clkcfg 17>;
> +        clocks = <&clkcfg 17>, <&clkcfg 37>;
>          interrupt-parent = <&plic>;
>          interrupts = <56>;
>      };
> -- 
> 2.43.0
> 
> 

Marc

-- 
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