linux-kernel - Re: [PATCH 1/2] scripts/make_fit: Drop fdt image entry compatible string

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Message-ID: <CAFLszTh5M+4Vp8oR3t-=6vsROgVJa0NU4egfJu2QuugjAfbrsw@mail.gmail.com>
Date: Thu, 23 May 2024 11:38:31 -0600
From: Simon Glass <sjg@...omium.org>
To: wens@...nel.org
Cc: Chen-Yu Tsai <wenst@...omium.org>, Masahiro Yamada <masahiroy@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 1/2] scripts/make_fit: Drop fdt image entry compatible string

Hi ChenYu,

On Thu, 23 May 2024 at 11:30, Chen-Yu Tsai <wens@...nel.org> wrote:
>
> On Fri, May 24, 2024 at 1:19 AM Simon Glass <sjg@...omium.org> wrote:
> >
> > Hi Chen-Yu,
> >
> > On Tue, 21 May 2024 at 00:51, Chen-Yu Tsai <wenst@...omium.org> wrote:
> > >
> > > According to the FIT image spec, the compatible string in the fdt image
> >
> > Can you please add a link to where it says this in the spec? I cannot
> > find it after a short search.
>
> (Quick reply from my other email before I forget.)
>
> From the FIT source file format document, found in U-boot source
> "doc/usage/fit/source_file_format.rst", or on the website:
> https://docs.u-boot.org/en/latest/usage/fit/source_file_format.html
>
> Under "'/images' node" -> "Conditionally mandatory property", the
> "compatible" property is described as "compatible method for loading image."
>
> I'll add the reference in the next version.

OK thank you.

There is also a spec version at [1] - it might be worth adding mention
of this explicitly for the fdt nodes.

Regards,
Simon

[1] https://github.com/open-source-firmware/flat-image-tree/

>
>
> ChenYu
>
> > I believe this patch is correct. Since the information is in the
> > configuration node it does not need to be in the FDT.
> >
> > > node or any image node specifies the method to load the image, not the
> > > compatible string embedded in the FDT or used for matching.
> > >
> > > Drop the compatible string from the fdt image entry node.
> > >
> > > While at it also fix up a typo in the document section of output_dtb.
> > >
> > > Fixes: 7a23b027ec17 ("arm64: boot: Support Flat Image Tree")
> > > Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
> > > ---
> > >  scripts/make_fit.py | 3 +--
> > >  1 file changed, 1 insertion(+), 2 deletions(-)
> > >
> > > diff --git a/scripts/make_fit.py b/scripts/make_fit.py
> > > index 3de90c5a094b..263147df80a4 100755
> > > --- a/scripts/make_fit.py
> > > +++ b/scripts/make_fit.py
> > > @@ -190,7 +190,7 @@ def output_dtb(fsw, seq, fname, arch, compress):
> > >      Args:
> > >          fsw (libfdt.FdtSw): Object to use for writing
> > >          seq (int): Sequence number (1 for first)
> > > -        fmame (str): Filename containing the DTB
> > > +        fname (str): Filename containing the DTB
> > >          arch: FIT architecture, e.g. 'arm64'
> > >          compress (str): Compressed algorithm, e.g. 'gzip'
> > >
> > > @@ -211,7 +211,6 @@ def output_dtb(fsw, seq, fname, arch, compress):
> > >          fsw.property_string('type', 'flat_dt')
> > >          fsw.property_string('arch', arch)
> > >          fsw.property_string('compression', compress)
> > > -        fsw.property('compatible', bytes(compat))
> > >
> > >          with open(fname, 'rb') as inf:
> > >              compressed = compress_data(inf, compress)
> > > --
> > > 2.45.0.215.g3402c0e53f-goog
> > >
> >
> > Regards,
> > Simon
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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