[PATCH linux dev-4.7 1/3] ARM: dts: aspeed-g5: Add SoC Display Controller node

[Rick Altherr]

The AST2500 datasheet I have covers both 2500 and 2520.  The table of
contents has many peripherals that have (AST2520 Excluded) next to them.

On Mon, Feb 13, 2017 at 1:26 PM, Andrew Jeffery <andrew at aj.id.au> wrote:

> On Mon, 2017-02-13 at 11:24 -0600, Patrick Williams wrote:
> > On Mon, Feb 13, 2017 at 01:28:49PM +1030, Andrew Jeffery wrote:
> > > diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi
> b/arch/arm/boot/dts/aspeed-g5.dtsi
> > > index e1994c9e38c3..5ce0a7a65e77 100644
> > > --- a/arch/arm/boot/dts/aspeed-g5.dtsi
> > > +++ b/arch/arm/boot/dts/aspeed-g5.dtsi
> > > @@ -1005,6 +1005,12 @@
> > > > >                                 reg = <0x1e6e202c 0x4>;
> > > > >                         };
> > >
> > > > > > > +                   gfx: display at 1e6e6000 {
> > > > > +                               compatible = "aspeed,ast2500-gfx",
> "syscon";
> > > > > +                               reg = <0x1e6e6000 0x1000>;
> > > > > +                               reg-io-width = <4>;
> > > > > +                       };
> > > +
> >
>
>
> >   I believe Zaius is using a
> > variant of the 2500 that does not have the graphics engine.
>
> According to Rick, Zaius is using the AST2500 for the EVT but in the
> future they will be looking at moving to a chip without the graphics
> engine.
>
> > Is this valid to add on all G5 chips?
>
> Not on the AST2520 according to the marketing material[1]. I would
> prefer to use the datasheet for the SoC as a reference though, and I
> don't have an AST2520 datasheet.
>
> The fix *should* just be a matter of a small change to the pinctrl
> bindings, and we can do this when we come to support the AST2520.
>
> Andrew
>
> [1] https://www.aspeedtech.com/products.php?fPath=20&rId=456
>
>
> >
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