Hi,
On Wed, 2018-12-05 at 17:49 +0800, Chen-Yu Tsai wrote:
> On Wed, Dec 5, 2018 at 5:48 PM Paul Kocialkowski
> <[email protected]> wrote:
> > Hi,
> >
> > On Wed, 2018-12-05 at 17:45 +0800, Chen-Yu Tsai wrote:
> > > On Wed, Dec 5, 2018 at 5:25 PM Paul Kocialkowski
> > > <[email protected]> wrote:
> > > > Add the H5-specific system control node description to its device-tree
> > > > with support for the SRAM C1 section, that will be used by the video
> > > > codec node later on.
> > > >
> > > > The CPU-side SRAM address was obtained empirically while the size was
> > > > taken from the documentation. They may not be entirely accurate.
> > > >
> > > > Signed-off-by: Paul Kocialkowski <[email protected]>
> > > > ---
> > > > arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi | 22 ++++++++++++++++++++
> > > > 1 file changed, 22 insertions(+)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> > > > b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> > > > index b41dc1aab67d..42bfb560b367 100644
> > > > --- a/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> > > > +++ b/arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi
> > > > @@ -94,6 +94,28 @@
> > > > };
> > > >
> > > > soc {
> > > > + system-control@1c00000 {
> > > > + compatible =
> > > > "allwinner,sun50i-h5-system-control";
> > > > + reg = <0x01c00000 0x1000>;
> > > > + #address-cells = <1>;
> > > > + #size-cells = <1>;
> > > > + ranges;
> > > > +
> > > > + sram_c1: sram@1d00000 {
> > > > + compatible = "mmio-sram";
> > > > + reg = <0x00018000 0x1c000>;
> > >
> > > 0x1d00000 or 0x18000?
> >
> > For the H5, I found the VE SRAM area to be mapped to 0x18000 on the CPU
> > side (when testing with devmem), unlike the A64, H3 and others. I was
> > rather surprised about this as well!
>
> I'm actually referring to the node name that still says 1d00000.
Oh I totally missed that, sorry. Thanks for pointing it out!
Cheers,
Paul
> ChenYu
>
> > > > + #address-cells = <1>;
> > > > + #size-cells = <1>;
> > > > + ranges = <0 0x00018000 0x1c000>;
> > >
> > > Same here.
> > >
> > > > +
> > > > + ve_sram: sram-section@0 {
> > > > + compatible =
> > > > "allwinner,sun50i-h5-sram-c1",
> > > > +
> > > > "allwinner,sun4i-a10-sram-c1";
> > > > + reg = <0x000000 0x1c000>;
> > > > + };
> > > > + };
> > > > + };
> > > > +
> > > > mali: gpu@1e80000 {
> > > > compatible = "allwinner,sun50i-h5-mali",
> > > > "arm,mali-450";
> > > > reg = <0x01e80000 0x30000>;
> > > > --
> > > > 2.19.2
> >
> > Cheers,
> >
> > Paul
> >
> > --
> > Paul Kocialkowski, Bootlin (formerly Free Electrons)
> > Embedded Linux and kernel engineering
> > https://bootlin.com
> >
--
Paul Kocialkowski, Bootlin (formerly Free Electrons)
Embedded Linux and kernel engineering
https://bootlin.com
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