Re: [PATCH v2] Documentation: devicetree: list automatic boot argument fixups

[Sascha Hauer <sha@pengutronix.de>]

On Fri, Mar 17, 2023 at 01:19:37PM +0100, Johannes Zink wrote:
> Barebox automatically fixes up several properties to the root and
> chosen node of the device tree passed to the booted system.
> 
> These entries contain information about the hardware, reset source
> and the barebox version string.
> 
> Add documentation on how to query these information from the booted
> linux system.
> 
> Signed-off-by: Johannes Zink <j.zink@pengutronix.de>
> ---
>  Changelog:
> 
>  v1 -> v2: Correct errors in content spotted by Ahmad. While at it, fix some typos.
> 
>  Documentation/devicetree/index.rst | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)

Applied, thanks

Sascha

> 
> diff --git a/Documentation/devicetree/index.rst b/Documentation/devicetree/index.rst
> index 36fa69058d1d..f85ce6608d14 100644
> --- a/Documentation/devicetree/index.rst
> +++ b/Documentation/devicetree/index.rst
> @@ -151,3 +151,25 @@ Contents:
>     bindings/regulator/*
>     bindings/rtc/*
>     bindings/watchdog/*
> +
> +Automatic Boot Argument Fixups to the Devicetree
> +------------------------------------------------
> +
> +barebox automatically fixes up some boot and system information in the device tree.
> +
> +In the device tree root, barebox fixes up
> +
> + * serial-number (if available)
> + * machine compatible (if overridden)
> +
> +In the ``chosen``-node, barebox fixes up
> +
> + * barebox-version
> + * reset-source
> + * reset-source-instance (if available)
> + * reset-source-device (node-path, only if available)
> + * bootsource
> + * boot-hartid (only on RISC-V)
> +
> +These values can be read from the booted linux system in ``/proc/device-tree/``
> +or ``/sys/firmware/devicetree/base``.
> -- 
> 2.30.2
> 
> 
> 

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