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To: Ard Biesheuvel <ard.biesheuvel@linaro.org>, edk2-devel@lists.01.org,
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References: <20180105093629.7885-1-ard.biesheuvel@linaro.org>
From: Laszlo Ersek <lersek@redhat.com>
Message-ID: <422cb5a0-e763-b859-c077-b11c76bf8698@redhat.com>
Date: Fri, 5 Jan 2018 21:20:08 +0100
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 (mx1.redhat.com [10.5.110.32]); Fri, 05 Jan 2018 20:20:10 +0000 (UTC)
Subject: Re: [PATCH] BaseTools/build_rule: disable DTC legacy phandle format
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On 01/05/18 10:36, Ard Biesheuvel wrote:
> By default, the device tree compiler emits phandle properties twice:
> one called 'phandle' and another called 'linux,phandle'. Given that
> Linux was updated in early 2010 [0] to accept the former (which is
> what is specified in the ePAPR and device tree specifications), there
> is no point in emitting both when compiling device trees for UEFI
> platforms.
> 
> [0] 04b954a673dd02f585a2769c4945a43880faa989
>     "of/flattree: Make the kernel accept ePAPR style phandle information"
> 
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  BaseTools/Conf/build_rule.template | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/BaseTools/Conf/build_rule.template b/BaseTools/Conf/build_rule.template
> index 3e6aa8ff0f34..10a91fe3a6c6 100755
> --- a/BaseTools/Conf/build_rule.template
> +++ b/BaseTools/Conf/build_rule.template
> @@ -250,7 +250,7 @@
>  
>      <Command.GCC>
>          "$(PP)" $(DTCPP_FLAGS) $(INC) ${src} > ${d_path}(+)${s_base}.i
> -        "$(DTC)" -I dts -O dtb -o ${dst} ${d_path}(+)${s_base}.i
> +        "$(DTC)" -H epapr -I dts -O dtb -o ${dst} ${d_path}(+)${s_base}.i
>  
>  [Visual-Form-Representation-File]
>      <InputFile>
> 

[0] is part of Linux v2.6.34 :)

Reviewed-by: Laszlo Ersek <lersek@redhat.com>