Re: [PATCH v2 4/9] dt-bindings: power: Add rpm power domain bindings for qcs404

[Sibi Sankar]

On 2019-03-25 09:51, Rajendra Nayak wrote:
> On 3/24/2019 11:20 PM, Sibi Sankar wrote:
> > From: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> >
> > Add RPM Power domain bindings for the qcs404 family of SoC
> >
> > [sibis: Add supported rpmpd states for qcs404]
> > Signed-off-by: Sibi Sankar <sibis@xxxxxxxxxxxxxx>
>
> SoB ordering seems wrong.

will re-order them in v3

> > Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> > ---
> >   .../devicetree/bindings/power/qcom,rpmpd.txt  |  1 +
> >   include/dt-bindings/power/qcom-rpmpd.h        | 22 
> > +++++++++++++++++++
> >   2 files changed, 23 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/power/qcom,rpmpd.txt 
> > b/Documentation/devicetree/bindings/power/qcom,rpmpd.txt
> > index 980e5413d18f..172ccf940c5c 100644
> > --- a/Documentation/devicetree/bindings/power/qcom,rpmpd.txt
> > +++ b/Documentation/devicetree/bindings/power/qcom,rpmpd.txt
> > @@ -6,6 +6,7 @@ which then translates it into a corresponding voltage 
> > on a rail
> >   Required Properties:
> >    - compatible: Should be one of the following
> >   	* qcom,msm8996-rpmpd: RPM Power domain for the msm8996 family of 
> > SoC
> > +	* qcom,qcs404-rpmpd: RPM Power domain for the qcs404 family of SoC
> >   	* qcom,sdm845-rpmhpd: RPMh Power domain for the sdm845 family of 
> > SoC
> >    - #power-domain-cells: number of cells in Power domain specifier
> >   	must be 1.
> > diff --git a/include/dt-bindings/power/qcom-rpmpd.h 
> > b/include/dt-bindings/power/qcom-rpmpd.h
> > index 87d9c6611682..450378662944 100644
> > --- a/include/dt-bindings/power/qcom-rpmpd.h
> > +++ b/include/dt-bindings/power/qcom-rpmpd.h
> > @@ -36,4 +36,26 @@
> >   #define MSM8996_VDDSSCX		5
> >   #define MSM8996_VDDSSCX_VFC	6
> >   +/* QCS404 Power Domains */
> > +#define QCS404_VDDMX		0
> > +#define QCS404_VDDMX_AO		1
> > +#define QCS404_VDDMX_VFL	2
> > +#define QCS404_LPICX		3
> > +#define QCS404_LPICX_VFL	4
> > +#define QCS404_LPIMX		5
> > +#define QCS404_LPIMX_VFL	6
> > +
> > +/* RPM SMD Power Domain performance levels */
>
> so unlike in the sdm845 case where we map these levels to
> (contiguous) corners before passing it over to rpm, we seem
> to pass these as-is to rpm, right?
>
> Does this work if the user passes some value which does not
> really map to a level defined here?
> For instance if value passed is 17 for instance do we fall back to
> 16?

The rpm firmware will ensure that a ceil operation
is performed on any requested level which does not
map to a pre-defined level. I did try to do the
same in kernel however since the opp-levels are not
inserted in ascending order while populating the
opp-table for rpmpd, it becomes difficult to get
ceil/floor levels from the opp-table with minimal
changes.


> > +#define RPM_SMD_LEVEL_RETENTION       16
> > +#define RPM_SMD_LEVEL_RETENTION_PLUS  32
> > +#define RPM_SMD_LEVEL_MIN_SVS         48
> > +#define RPM_SMD_LEVEL_LOW_SVS         64
> > +#define RPM_SMD_LEVEL_SVS             128
> > +#define RPM_SMD_LEVEL_SVS_PLUS        192
> > +#define RPM_SMD_LEVEL_NOM             256
> > +#define RPM_SMD_LEVEL_NOM_PLUS        320
> > +#define RPM_SMD_LEVEL_TURBO           384
> > +#define RPM_SMD_LEVEL_TURBO_NO_CPR    416
> > +#define RPM_SMD_LEVEL_BINNING         512
> > +
> >   #endif

--
-- Sibi Sankar --
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