Re: [PATCH 1/8] arm64: dts: renesas: hihope-common: Move du clk properties out of common dtsi

From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Biju Das <biju.das@bp.renesas.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Simon Horman <horms@verge.net.au>,
	Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Magnus Damm <magnus.damm@gmail.com>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@vger.kernel.org>,
	Chris Paterson <Chris.Paterson2@renesas.com>,
	Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Subject: Re: [PATCH 1/8] arm64: dts: renesas: hihope-common: Move du clk properties out of common dtsi
Date: Tue, 1 Oct 2019 20:17:53 +0200	[thread overview]
Message-ID: <CAMuHMdVHFmcC16jgnwmf2225VqqahxJ-ipwOTZoinShgVYnHyw@mail.gmail.com> (raw)
In-Reply-To: <20191001181134.GC4735@pendragon.ideasonboard.com>

Hi Laurent,

On Tue, Oct 1, 2019 at 8:11 PM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Tue, Oct 01, 2019 at 01:15:17PM +0100, Biju Das wrote:
> > RZ/G2N board is pin compatible with RZ/G2M board. However on the SoC
> > side RZ/G2N uses DU3 where as RZ/G2M uses DU2 for the DPAD. In order to
> > reuse the common dtsi for both the boards, it is required to move du clock
> > properties from common dtsi to board specific dts.
> >
> > Signed-off-by: Biju Das <biju.das@bp.renesas.com>
>
> It would be nice if DT had a syntax that allowed extending an existing
> property. It would allow us to write
>
> &du {
>         clocks += <&versaclock5 1>,
>                   <&x302_clk>,
>                   <&versaclock5 2>;
>         clock-names += "dclkin.0", "dclkin.1", "dclkin.2";
> };
>
> in hihope-common.dtsi and be done with it.
>
> Rob, do you think that's something worth adding ?

Yeah, we already have /delete-property/, but not yet /append-property/.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds