linux-kernel - Re: [PATCH V2 3/5] PM / OPP: Remove 'operating-points-names' binding

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Date:	Wed, 4 Nov 2015 21:09:33 -0600
From:	Rob Herring <robh@...nel.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Rafael Wysocki <rjw@...ysocki.net>, robh+dt@...nel.org,
	sboyd@...eaurora.org, lee.jones@...aro.org,
	linaro-kernel@...ts.linaro.org, linux-pm@...r.kernel.org,
	mark.rutland@....com, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org, nm@...com,
	devicetree@...r.kernel.org, b.zolnierkie@...sung.com,
	m.szyprowski@...sung.com, open list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH V2 3/5] PM / OPP: Remove 'operating-points-names' binding

On Thu, Nov 05, 2015 at 07:11:54AM +0530, Viresh Kumar wrote:
> These aren't used until now by any DT files and wouldn't be used now as
> we have a better scheme in place now, i.e. opp-property-<name>
> properties.
> 
> Remove the (useless) binding without breaking ABI.
> 
> Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Acked-by: Rob Herring <robh@...nel.org>

> ---
>  Documentation/devicetree/bindings/opp/opp.txt | 62 +--------------------------
>  1 file changed, 2 insertions(+), 60 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
> index 61c6f25cf8e2..30c4bb3718bc 100644
> --- a/Documentation/devicetree/bindings/opp/opp.txt
> +++ b/Documentation/devicetree/bindings/opp/opp.txt
> @@ -45,21 +45,10 @@ Devices supporting OPPs must set their "operating-points-v2" property with
>  phandle to a OPP table in their DT node. The OPP core will use this phandle to
>  find the operating points for the device.
>  
> -Devices may want to choose OPP tables at runtime and so can provide a list of
> -phandles here. But only *one* of them should be chosen at runtime. This must be
> -accompanied by a corresponding "operating-points-names" property, to uniquely
> -identify the OPP tables.
> -
>  If required, this can be extended for SoC vendor specfic bindings. Such bindings
>  should be documented as Documentation/devicetree/bindings/power/<vendor>-opp.txt
>  and should have a compatible description like: "operating-points-v2-<vendor>".
>  
> -Optional properties:
> -- operating-points-names: Names of OPP tables (required if multiple OPP
> -  tables are present), to uniquely identify them. The same list must be present
> -  for all the CPUs which are sharing clock/voltage rails and hence the OPP
> -  tables.
> -
>  * OPP Table Node
>  
>  This describes the OPPs belonging to a device. This node can have following
> @@ -454,54 +443,7 @@ Example 4: Handling multiple regulators
>  	};
>  };
>  
> -Example 5: Multiple OPP tables
> -
> -/ {
> -	cpus {
> -		cpu@0 {
> -			compatible = "arm,cortex-a7";
> -			...
> -
> -			cpu-supply = <&cpu_supply>
> -			operating-points-v2 = <&cpu0_opp_table_slow>, <&cpu0_opp_table_fast>;
> -			operating-points-names = "slow", "fast";
> -		};
> -	};
> -
> -	cpu0_opp_table_slow: opp_table_slow {
> -		compatible = "operating-points-v2";
> -		status = "okay";
> -		opp-shared;
> -
> -		opp00 {
> -			opp-hz = /bits/ 64 <600000000>;
> -			...
> -		};
> -
> -		opp01 {
> -			opp-hz = /bits/ 64 <800000000>;
> -			...
> -		};
> -	};
> -
> -	cpu0_opp_table_fast: opp_table_fast {
> -		compatible = "operating-points-v2";
> -		status = "okay";
> -		opp-shared;
> -
> -		opp10 {
> -			opp-hz = /bits/ 64 <1000000000>;
> -			...
> -		};
> -
> -		opp11 {
> -			opp-hz = /bits/ 64 <1100000000>;
> -			...
> -		};
> -	};
> -};
> -
> -Example 6: opp-supported-hw
> +Example 5: opp-supported-hw
>  (example: three level hierarchy of versions: cuts, substrate and process)
>  
>  / {
> @@ -546,7 +488,7 @@ Example 6: opp-supported-hw
>  	};
>  };
>  
> -Example 7: opp-microvolt-<name>, opp-microamp-<name>, turbo-mode-<name>,
> +Example 6: opp-microvolt-<name>, opp-microamp-<name>, turbo-mode-<name>,
>  opp-suspend-<name>:
>  (example: device with two possible microvolt ranges: slow and fast)
>  
> -- 
> 2.6.2.198.g614a2ac
> 
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