linux-kernel - Re: [PATCH 2/6] dt-bindings: can: mcp25xxfd: document device tree bindings

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Date:   Tue, 29 Sep 2020 11:46:32 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>, linux-can@...r.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dev.kurt@...dijck-laurijssen.be
Subject: Re: [PATCH 2/6] dt-bindings: can: mcp25xxfd: document device tree bindings

Hi Manivannan, Oleksij,

On Thu, Sep 10, 2020 at 11:37 PM Manivannan Sadhasivam
<manivannan.sadhasivam@...aro.org> wrote:
> From: Oleksij Rempel <o.rempel@...gutronix.de>
>
> This patch adds the device-tree binding documentation for the Microchip
> MCP25xxFD SPI CAN controller family.
>
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks for your patch, which is now commit 1b5a78e69c1fdae9
("dt-binding: can: mcp25xxfd: document device tree bindings") in net-next.

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
> @@ -0,0 +1,79 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/can/microchip,mcp25xxfd.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title:
> +  Microchip MCP2517FD and MCP2518FD stand-alone CAN controller device tree
> +  bindings
> +
> +maintainers:
> +  - Marc Kleine-Budde <mkl@...gutronix.de>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: microchip,mcp2517fd
> +        description: for MCP2517FD
> +      - const: microchip,mcp2518fd
> +        description: for MCP2518FD
> +      - const: microchip,mcp25xxfd
> +        description: to autodetect chip variant

The last one is a wildcard?
When would you want to use it (oh, in the example below)?
Can you guarantee Microchip will not introduce other components that
match this wildcard, but are not compatible?

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds