linux-kernel - Re: [PATCH v4 1/2] dt: cpufreq: st: Provide bindings for ST's CPUFreq implementation

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Message-ID: <20150728022308.GA1229@linux>
Date:	Tue, 28 Jul 2015 07:53:08 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, rjw@...ysocki.net, linux-pm@...r.kernel.org,
	devicetree@...r.kernel.org, ajitpal.singh@...com, sre@...nel.org,
	dbaryshkov@...il.com
Subject: Re: [PATCH v4 1/2] dt: cpufreq: st: Provide bindings for ST's
 CPUFreq implementation

On 27-07-15, 16:20, Lee Jones wrote:
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
> 
> Changelog:
>  - Using OPP-v2
>  - Moved (and linked) a bunch of documentation to ../power/
> 
>  .../devicetree/bindings/cpufreq/cpufreq-st.txt     | 40 ++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt
> new file mode 100644
> index 0000000..79add9d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-st.txt
> @@ -0,0 +1,40 @@
> +Binding for ST's CPUFreq driver
> +===============================
> +
> +Frequency Scaling only
> +----------------------
> +
> +Located in CPU's node:
> +
> +- operating-points		: [See: ../power/opp.txt]
> +
> +Example [safe]
> +--------------
> +
> +cpus {
> +	cpu@0 {
> +				 /* kHz     uV   */
> +		operating-points = <1500000 0
> +				    1200000 0
> +				    800000  0
> +				    500000  0>;
> +	};
> +};
> +
> +Dynamic Voltage and Frequency Scaling (DVFS)
> +--------------------------------------------
> +
> +Located in CPU's node:
> +
> +- operating-points-v2-sti	: [See ../power/opp-st.txt]
> +
> +Example [unsafe]
> +----------------
> +
> +cpus {
> +	cpu@0 {
> +		operating-points-v2	= <[OPP list phandle]>;
> +	};
> +};
> +
> +For an example of an OPP list, see ../power/opp-st.txt.

I don't think you need this file/patch at all.. It is almost blank and
doesn't define a binding. And so there is no need to specify this at
all. Just an OPP binding file is enough.

-- 
viresh
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