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Date: Tue, 31 May 2022 16:43:18 -0400 From: Frank Rowand <frowand.list@...il.com> To: Qun-Wei Lin <qun-wei.lin@...iatek.com>, robh+dt@...nel.org, matthias.bgg@...il.com Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, casper.li@...iatek.com, chinwen.chang@...iatek.com, kuan-ying.lee@...iatek.com Subject: Re: [PATCH] scripts: dtc: fix a false alarm for node_name_chars_strict On 5/31/22 01:33, Qun-Wei Lin wrote: > The function check_node_name_chars_strict issues a false alarm when > compiling an overlay dts. > > /fragment@..._overlay__: Character '_' not recommended in node name > > This workaround will fix it by skip checking for node named __overlay__. This is not a false alarm. Do not special case node name "__overlay__". This node name should never occur in a modern overlay source file. For details, see "Overlay Source Format" in the "Overlays" section of: https://elinux.org/Device_Tree_Reference#Overlays That paragraph also has a pointer to the correct format for overlay source files, which is slides 29-34 of: https://elinux.org/Device_Tree_Reference#Overlays -Frank > > Signed-off-by: Qun-Wei Lin <qun-wei.lin@...iatek.com> > --- > scripts/dtc/checks.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c > index 781ba1129a8e..6ef4f2cd67b9 100644 > --- a/scripts/dtc/checks.c > +++ b/scripts/dtc/checks.c > @@ -325,6 +325,11 @@ static void check_node_name_chars_strict(struct check *c, struct dt_info *dti, > { > int n = strspn(node->name, c->data); > > + if (streq(node->name, "__overlay__")) { > + /* HACK: Overlay fragments are a special case */ > + return; > + } > + > if (n < node->basenamelen) > FAIL(c, dti, node, "Character '%c' not recommended in node name", > node->name[n]);
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