linux-kernel - Re: [PATCH 2/2] arm: boot: store ATAG structure into DT atags field

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Date:	Fri, 15 May 2015 22:12:41 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Rob Herring <robherring2@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <will.deacon@....com>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...ian.org>,
	Pavel Machek <pavel@....cz>, Tony Lindgren <tony@...mide.com>,
	Andreas Färber <afaerber@...e.de>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm: boot: store ATAG structure into DT atags field

On Friday 15 May 2015 21:50:07 Pali Rohár wrote:
>                 }
>         }
>  
> +       /* include the terminating ATAG_NONE */
> +       atag_size = (char *)atag - (char *)atag_list + sizeof(struct tag_header);
> +       setprop(fdt, "/", "atags", atag_list, atag_size);
> +
>         if (memcount) {
>                 setprop(fdt, "/memory", "reg", mem_reg_property,
>                         4 * memcount * memsize);
> 

The property should probably have a DT binding, and be named "linux,atags".

It may also help to check if the "linux,atags" property already exists and not
create it otherwise. That way we can put it into the n900 dts file and have
it updated by the compat code, but not expose the atags on other platforms
unless they opt in.

	Arnd
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