Re: [PATCH v2 02/66] dt-bindings: interconnect: sunxi: Add V3s mbus compatible

Paul Kocialkowski
2022-02-07T09:44:43Z

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Hi Jernej,

On Mon 07 Feb 22, 09:50, Jernej Škrabec wrote:
> Hi Paul,
>
> Dne ponedeljek, 07. februar 2022 ob 09:43:43 CET je Paul Kocialkowski
> napisal(a):
> > Hi,
> >
> > On Sat 05 Feb 22, 14:14, Samuel Holland wrote:
> > > On 2/5/22 12:53 PM, Paul Kocialkowski wrote:
> > > > Since the V3s uses the internal mbus, document its compatible.
> > > >
> > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> > > > ---
> > > >
> > > > .../devicetree/bindings/arm/sunxi/allwinner,sun4i-a10-mbus.yaml | 1 +
> > > > 1 file changed, 1 insertion(+)
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun4i-a10-mbus.
> > > > yaml
> > > > b/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun4i-a10-mbus.
> > > > yaml index 29c9961ee2d8..b67bf9261a6a 100644
> > > > ---
> > > > a/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun4i-a10-mbus.
> > > > yaml +++
> > > > b/Documentation/devicetree/bindings/arm/sunxi/allwinner,sun4i-a10-mbus.
> > > > yaml> >
> > > > @@ -31,6 +31,7 @@ properties:
> > > > - allwinner,sun5i-a13-mbus
> > > > - allwinner,sun8i-h3-mbus
> > > > - allwinner,sun8i-r40-mbus
> > > >
> > > > + - allwinner,sun8i-v3s-mbus
> > >
> > > Please enable the expanded binding added in commit 245578ba9f03
> > > ("dt-bindings: arm: sunxi: Expand MBUS binding")[1] by adding the new
> > > compatible to the "if" block lower in the file. That way we can add V3S
> > > devfreq support in the future without changing that binding.
> >
> > I had missed that new driver but surely I will expand the updated binding.
> >
> > By the way do you have an explanation about the cell index given to the
> > interconnects (after &mbus)?
>
> This is mbus channel. You can find appropriate one checking DRAM driver in U-
> Boot, where mbus is configured.

Thanks, that's exactly what I was looking for! Looks like in my case
MBUS_PORT_CSI will be used both for CSI and ISP.

For the record it's also defined in the BSP kernel at:
include/linux/sunxi_mbus.h

Thanks,

Paul

> Best regards,
> Jernej
>
> >
> > Paul
> >
> > > Regards,
> > > Samuel
> > >
> > > [1]: https://git.kernel.org/torvalds/c/245578ba9f03
> > >
> > > > - allwinner,sun50i-a64-mbus
> > > >
> > > > reg:
>
>
>
>

--
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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