Re: [PATCH v2 3/3] dts: arm64/sdm845: Add node for qcom,smmu-v2

[Vivek Gautam]

Hi Rob, Robin,


On 8/15/2018 4:27 AM, Rob Herring wrote:
> On Wed, Aug 15, 2018 at 01:09:43AM +0530, Vivek Gautam wrote:
> > Adding Jordan here.
> >
> > On Tue, Aug 14, 2018 at 4:19 PM, Robin Murphy <robin.murphy@xxxxxxx> wrote:
> > > Hi Vivek,
> > >
> > > On 14/08/18 11:27, Vivek Gautam wrote:
> > > > Add device node for qcom,smmu-v2 available on sdm845.
> > > > This smmu is available only to GPU device.
> > > >
> > > > Signed-off-by: Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx>
> > > > ---
> > > >    arch/arm64/boot/dts/qcom/sdm845.dtsi | 23 +++++++++++++++++++++++
> > > >    1 file changed, 23 insertions(+)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > > b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > > index 1c2be2082f33..bd1ec5fa5146 100644
> > > > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > > > @@ -6,6 +6,7 @@
> > > >     */
> > > >      #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> > > > +#include <dt-bindings/clock/qcom,gpucc-sdm845.h>
> > > >    #include <dt-bindings/clock/qcom,rpmh.h>
> > > >    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > >    #include <dt-bindings/soc/qcom,rpmh-rsc.h>
> > > > @@ -989,6 +990,28 @@
> > > >                          cell-index = <0>;
> > > >                  };
> > > >    +             gpu_smmu: iommu@5040000 {
> > > > +                       compatible = "qcom,sdm845-smmu-v2",
> > > > "qcom,smmu-v2";
> > >
> > > Which of "sdm845" or "msm8996"[1] is the actual SoC name here?
> > Well, the bindings use the SoC prefix with smmu-v2, so it should be
> > sdm845 for this SoC. This is same as I posted in my v1 of the series [2].
> > Using 8996 based string in sdm845 makes things look awful.
> You need to list valid values of '<soc>' in the binding. Otherwise we
> get this confusion.

Sorry for delayed response, I was away on vacation.
I will list down the valid values for '<soc>' as suggested, and respin 
this series, and
smmu bindings patch that comes as part of the runtime pm series [1].

[1] https://lore.kernel.org/patchwork/patch/968017/

Best regards
Vivek

> Rob