linux-kernel - Re: [linux-sunxi] [PATCH v5 09/22] ARM: dts: sun5i: Use most-qualified system control compatibles

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Date:   Tue, 10 Jul 2018 22:53:44 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     Linux Media Mailing List <linux-media@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Marco Franchi <marco.franchi@....com>,
        Icenowy Zheng <icenowy@...c.io>,
        Hans Verkuil <hverkuil@...all.nl>,
        Keiichi Watanabe <keiichiw@...omium.org>,
        Jonathan Corbet <corbet@....net>,
        Smitha T Murthy <smitha.t@...sung.com>,
        Tom Saeger <tom.saeger@...cle.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        "David S . Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Jacob Chen <jacob-chen@...wrt.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Benoit Parrot <bparrot@...com>,
        Todor Tomov <todor.tomov@...aro.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Pawel Osciak <posciak@...omium.org>,
        Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Niklas Söderlund 
        <niklas.soderlund+renesas@...natech.se>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Hugues Fruchet <hugues.fruchet@...com>,
        Randy Li <ayaka@...lik.info>
Subject: Re: [linux-sunxi] [PATCH v5 09/22] ARM: dts: sun5i: Use
 most-qualified system control compatibles

On Tue, Jul 10, 2018 at 4:01 PM, Paul Kocialkowski
<paul.kocialkowski@...tlin.com> wrote:
> This switches the sun5i dtsi to use the most qualified compatibles for
> the system-control block (previously named SRAM controller) as well as
> the SRAM blocks. The sun4i-a10 compatibles are kept since these hardware
> blocks are backward-compatible.

Not quite sure why they are backward-compatible. The A13 has less SRAM
mapping controls than the A10.

ChenYu

> The phandle for system control is also updated to reflect the fact that
> the controller described is really about system control rather than SRAM
> control.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> ---
>  arch/arm/boot/dts/sun5i.dtsi | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/boot/dts/sun5i.dtsi b/arch/arm/boot/dts/sun5i.dtsi
> index 07f2248ed5f8..68711954c293 100644
> --- a/arch/arm/boot/dts/sun5i.dtsi
> +++ b/arch/arm/boot/dts/sun5i.dtsi
> @@ -114,8 +114,9 @@
>                 #size-cells = <1>;
>                 ranges;
>
> -               sram-controller@...0000 {
> -                       compatible = "allwinner,sun4i-a10-sram-controller";
> +               system-control@...0000 {
> +                       compatible = "allwinner,sun5i-a13-system-control",
> +                                    "allwinner,sun4i-a10-system-control";
>                         reg = <0x01c00000 0x30>;
>                         #address-cells = <1>;
>                         #size-cells = <1>;
> @@ -130,7 +131,8 @@
>                         };
>
>                         emac_sram: sram-section@...0 {
> -                               compatible = "allwinner,sun4i-a10-sram-a3-a4";
> +                               compatible = "allwinner,sun5i-a13-sram-a3-a4",
> +                                            "allwinner,sun4i-a10-sram-a3-a4";
>                                 reg = <0x8000 0x4000>;
>                                 status = "disabled";
>                         };
> @@ -143,7 +145,8 @@
>                                 ranges = <0 0x00010000 0x1000>;
>
>                                 otg_sram: sram-section@0 {
> -                                       compatible = "allwinner,sun4i-a10-sram-d";
> +                                       compatible = "allwinner,sun5i-a13-sram-d",
> +                                                    "allwinner,sun4i-a10-sram-d";
>                                         reg = <0x0000 0x1000>;
>                                         status = "disabled";
>                                 };
> --
> 2.17.1
>
> --
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