diff mbox series

dt-bindings: cpufreq: cpufreq-qcom-hw: Document SM8350 CPUfreq compatible

Message ID 20210216111251.1838149-1-vkoul@kernel.org (mailing list archive)
State New
Delegated to: viresh kumar
Headers show
Series dt-bindings: cpufreq: cpufreq-qcom-hw: Document SM8350 CPUfreq compatible | expand

Commit Message

Vinod Koul Feb. 16, 2021, 11:12 a.m. UTC
Add the CPUfreq compatible for SM8350 SoC along with note for using the
specific compatible for SoCs

Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Viresh Kumar Feb. 17, 2021, 4:49 a.m. UTC | #1
On 16-02-21, 16:42, Vinod Koul wrote:
> Add the CPUfreq compatible for SM8350 SoC along with note for using the
> specific compatible for SoCs
> 
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
>  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> index 9299028ee712..3eb3cee59d79 100644
> --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> @@ -8,7 +8,9 @@ Properties:
>  - compatible
>  	Usage:		required
>  	Value type:	<string>
> -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> +			along with SoC specific compatible:
> +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"

And why is SoC specific compatible required here ? Is the implementation on
sm8350 any different than the ones using "qcom,cpufreq-epss" compatible ?

FWIW, the same compatible string must be reused until the time there is
difference in the hardware. The compatible string must be considered as a marker
for a particular version of the hardware.
Vinod Koul Feb. 18, 2021, 12:44 p.m. UTC | #2
On 17-02-21, 10:19, Viresh Kumar wrote:
> On 16-02-21, 16:42, Vinod Koul wrote:
> > Add the CPUfreq compatible for SM8350 SoC along with note for using the
> > specific compatible for SoCs
> > 
> > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > ---
> >  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > index 9299028ee712..3eb3cee59d79 100644
> > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > @@ -8,7 +8,9 @@ Properties:
> >  - compatible
> >  	Usage:		required
> >  	Value type:	<string>
> > -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> > +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> > +			along with SoC specific compatible:
> > +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"
> 
> And why is SoC specific compatible required here ? Is the implementation on
> sm8350 any different than the ones using "qcom,cpufreq-epss" compatible ?
> 
> FWIW, the same compatible string must be reused until the time there is
> difference in the hardware. The compatible string must be considered as a marker
> for a particular version of the hardware.

Rob has indicated that we should use a SoC specific compatible and I
agree with that. We are using both soc and generic one here and driver
will be loaded for generic one.

Thanks
Viresh Kumar Feb. 18, 2021, 3:48 p.m. UTC | #3
On 18-02-21, 18:14, Vinod Koul wrote:
> On 17-02-21, 10:19, Viresh Kumar wrote:
> > On 16-02-21, 16:42, Vinod Koul wrote:
> > > Add the CPUfreq compatible for SM8350 SoC along with note for using the
> > > specific compatible for SoCs
> > > 
> > > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > > ---
> > >  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
> > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > index 9299028ee712..3eb3cee59d79 100644
> > > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > @@ -8,7 +8,9 @@ Properties:
> > >  - compatible
> > >  	Usage:		required
> > >  	Value type:	<string>
> > > -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> > > +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> > > +			along with SoC specific compatible:
> > > +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"
> > 
> > And why is SoC specific compatible required here ? Is the implementation on
> > sm8350 any different than the ones using "qcom,cpufreq-epss" compatible ?
> > 
> > FWIW, the same compatible string must be reused until the time there is
> > difference in the hardware. The compatible string must be considered as a marker
> > for a particular version of the hardware.
> 
> Rob has indicated that we should use a SoC specific compatible and I
> agree with that. We are using both soc and generic one here and driver
> will be loaded for generic one.

I am not sure of the context, lets see what Rob has to say on this. I
believe we only need 1 compatible string here (whatever it is), as
this is just one version of the hardware we are talking about. We
already have 2 somehow and you are trying to add one more and I don't
fell good about it. :(
Bjorn Andersson Feb. 18, 2021, 4:11 p.m. UTC | #4
On Tue 16 Feb 05:12 CST 2021, Vinod Koul wrote:

> Add the CPUfreq compatible for SM8350 SoC along with note for using the
> specific compatible for SoCs
> 
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
>  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> index 9299028ee712..3eb3cee59d79 100644
> --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> @@ -8,7 +8,9 @@ Properties:
>  - compatible
>  	Usage:		required
>  	Value type:	<string>
> -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> +			along with SoC specific compatible:
> +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"

Can you please extend this to add all the platforms that we currently
support?


PS. Didn't we have someone working on converting this to yaml?

Regards,
Bjorn

>  
>  - clocks
>  	Usage:		required
> -- 
> 2.26.2
>
Vinod Koul Feb. 19, 2021, 5:59 p.m. UTC | #5
On 18-02-21, 10:11, Bjorn Andersson wrote:
> On Tue 16 Feb 05:12 CST 2021, Vinod Koul wrote:
> 
> > Add the CPUfreq compatible for SM8350 SoC along with note for using the
> > specific compatible for SoCs
> > 
> > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > ---
> >  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > index 9299028ee712..3eb3cee59d79 100644
> > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > @@ -8,7 +8,9 @@ Properties:
> >  - compatible
> >  	Usage:		required
> >  	Value type:	<string>
> > -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> > +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> > +			along with SoC specific compatible:
> > +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"
> 
> Can you please extend this to add all the platforms that we currently
> support?
> 
> PS. Didn't we have someone working on converting this to yaml?

Yep, Mani seems to have done that, I will wait for that to get merged
and update this.. Thanks
Rob Herring March 5, 2021, 9:57 p.m. UTC | #6
On Thu, Feb 18, 2021 at 09:18:20PM +0530, Viresh Kumar wrote:
> On 18-02-21, 18:14, Vinod Koul wrote:
> > On 17-02-21, 10:19, Viresh Kumar wrote:
> > > On 16-02-21, 16:42, Vinod Koul wrote:
> > > > Add the CPUfreq compatible for SM8350 SoC along with note for using the
> > > > specific compatible for SoCs
> > > > 
> > > > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > > > ---
> > > >  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
> > > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > > > 
> > > > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > > index 9299028ee712..3eb3cee59d79 100644
> > > > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > > @@ -8,7 +8,9 @@ Properties:
> > > >  - compatible
> > > >  	Usage:		required
> > > >  	Value type:	<string>
> > > > -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> > > > +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> > > > +			along with SoC specific compatible:
> > > > +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"
> > > 
> > > And why is SoC specific compatible required here ? Is the implementation on
> > > sm8350 any different than the ones using "qcom,cpufreq-epss" compatible ?
> > > 
> > > FWIW, the same compatible string must be reused until the time there is
> > > difference in the hardware. The compatible string must be considered as a marker
> > > for a particular version of the hardware.
> > 
> > Rob has indicated that we should use a SoC specific compatible and I
> > agree with that. We are using both soc and generic one here and driver
> > will be loaded for generic one.
> 
> I am not sure of the context, lets see what Rob has to say on this. I
> believe we only need 1 compatible string here (whatever it is), as
> this is just one version of the hardware we are talking about. We
> already have 2 somehow and you are trying to add one more and I don't
> fell good about it. :(

The h/w block is the same features and bugs in every single 
implementation? If not sure, better be safe.

I don't know that I'd go back and add SoC ones for everything though.

Rob
Vinod Koul March 8, 2021, 4:56 a.m. UTC | #7
On 05-03-21, 15:57, Rob Herring wrote:
> On Thu, Feb 18, 2021 at 09:18:20PM +0530, Viresh Kumar wrote:
> > On 18-02-21, 18:14, Vinod Koul wrote:
> > > On 17-02-21, 10:19, Viresh Kumar wrote:
> > > > On 16-02-21, 16:42, Vinod Koul wrote:
> > > > > Add the CPUfreq compatible for SM8350 SoC along with note for using the
> > > > > specific compatible for SoCs
> > > > > 
> > > > > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > > > > ---
> > > > >  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt | 4 +++-
> > > > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > > > index 9299028ee712..3eb3cee59d79 100644
> > > > > --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > > > +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
> > > > > @@ -8,7 +8,9 @@ Properties:
> > > > >  - compatible
> > > > >  	Usage:		required
> > > > >  	Value type:	<string>
> > > > > -	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
> > > > > +	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
> > > > > +			along with SoC specific compatible:
> > > > > +			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"
> > > > 
> > > > And why is SoC specific compatible required here ? Is the implementation on
> > > > sm8350 any different than the ones using "qcom,cpufreq-epss" compatible ?
> > > > 
> > > > FWIW, the same compatible string must be reused until the time there is
> > > > difference in the hardware. The compatible string must be considered as a marker
> > > > for a particular version of the hardware.
> > > 
> > > Rob has indicated that we should use a SoC specific compatible and I
> > > agree with that. We are using both soc and generic one here and driver
> > > will be loaded for generic one.
> > 
> > I am not sure of the context, lets see what Rob has to say on this. I
> > believe we only need 1 compatible string here (whatever it is), as
> > this is just one version of the hardware we are talking about. We
> > already have 2 somehow and you are trying to add one more and I don't
> > fell good about it. :(
> 
> The h/w block is the same features and bugs in every single 
> implementation? If not sure, better be safe.
> 
> I don't know that I'd go back and add SoC ones for everything though.

I would prefer we have SoC ones to be future proof..
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
index 9299028ee712..3eb3cee59d79 100644
--- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
@@ -8,7 +8,9 @@  Properties:
 - compatible
 	Usage:		required
 	Value type:	<string>
-	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss".
+	Definition:	must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss"
+			along with SoC specific compatible:
+			  "qcom,sm8350-cpufreq-epss", "qcom,cpufreq-epss"
 
 - clocks
 	Usage:		required