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Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN fixed transceiver bindings

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On Mon, Jul 24, 2017 at 06:05:19PM -0500, Franklin S Cooper Jr wrote:
> Add documentation to describe usage of the new fixed transceiver binding.
> This new binding is applicable for any CAN device therefore it exists as
> its own document.
> 
> Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
> ---
> Version 2:
> Tweak commit message working
> Tweak wording for properties
> Drop unit addressing
> Give example if CAN-FD isn't supported
> 
>  .../bindings/net/can/fixed-transceiver.txt         | 42 ++++++++++++++++++++++
>  1 file changed, 42 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/can/fixed-transceiver.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/can/fixed-transceiver.txt b/Documentation/devicetree/bindings/net/can/fixed-transceiver.txt
> new file mode 100644
> index 0000000..dc7e3eb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/can/fixed-transceiver.txt
> @@ -0,0 +1,42 @@
> +Fixed transceiver Device Tree binding
> +------------------------------
> +
> +CAN transceiver typically limits the max speed in standard CAN and CAN FD
> +modes. Typically these limitations are static and the transceivers themselves
> +provide no way to detect this limitation at runtime. For this situation,
> +the "fixed-transceiver" node can be used.
> +
> +Properties:
> +
> +Optional:
> + max-arbitration-speed: a positive non 0 value that determines the max
> +			speed that CAN can run in non CAN-FD mode or during the
> +			arbitration phase in CAN-FD mode.

Hi Franklin

Since this and the next property are optional, it is good to document
what happens when they are not in the DT blob. Also document what 0
means.

> +
> + max-data-speed:	a positive non 0 value that determines the max data rate
> +			that can be used in CAN-FD mode. A value of -1 implies
> +			CAN-FD is not supported by the transceiver.

-1 is ugly. I think it would be better to have a missing
max-data-speed property indicate that CAN-FD is not supported. And
maybe put 'fd' into the property name.

      Andrew

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[PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN fixed transceiver bindings Franklin S Cooper Jr <fcooper@ti.com> - 2017-07-25 01:10 +0200
  Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Oliver Hartkopp <socketcan@hartkopp.net> - 2017-07-25 18:40 +0200
    Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Franklin S Cooper Jr <fcooper@ti.com> - 2017-07-25 20:20 +0200
  Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Andrew Lunn <andrew@lunn.ch> - 2017-07-26 18:50 +0200
    Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Oliver Hartkopp <socketcan@hartkopp.net> - 2017-07-26 19:10 +0200
      Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Franklin S Cooper Jr <fcooper@ti.com> - 2017-07-26 20:30 +0200
        Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Oliver Hartkopp <socketcan@hartkopp.net> - 2017-07-27 20:50 +0200
          Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Franklin S Cooper Jr <fcooper@ti.com> - 2017-07-27 23:20 +0200
            Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be> - 2017-07-28 07:00 +0200
              Re: [PATCH v2 2/4] can: fixed-transceiver: Add documentation for CAN  fixed transceiver bindings Oliver Hartkopp <socketcan@hartkopp.net> - 2017-07-28 10:50 +0200

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