[PATCH v4 2/2] Documentation: devicetree: Add boost-frequency binding to list boost mode frequency

[Viresh Kumar]

On 23 May 2014 19:07, Thomas Abraham <thomas.ab at samsung.com> wrote:
> From: Thomas Abraham <thomas.ab at samsung.com>
>
> Add a new optional boost-frequency binding for specifying the frequencies
> usable in boost mode.
>
> Cc: Nishanth Menon <nm at ti.com>
> Cc: Lukasz Majewski <l.majewski at samsung.com>
> Cc: Rob Herring <robh+dt at kernel.org>
> Cc: Pawel Moll <pawel.moll at arm.com>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: Ian Campbell <ijc+devicetree at hellion.org.uk>
> Cc: Kumar Gala <galak at codeaurora.org>
> Signed-off-by: Thomas Abraham <thomas.ab at samsung.com>
> ---
>  .../devicetree/bindings/cpufreq/cpufreq-boost.txt  |   38 ++++++++++++++++++++
>  1 file changed, 38 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt
>
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt
> new file mode 100644
> index 0000000..63ed0fc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt
> @@ -0,0 +1,38 @@
> +* Device tree binding for CPU boost frequency (aka over-clocking)
> +
> +Certain CPU's can be operated in optional 'boost' mode (or sometimes referred as
> +overclocking) in which the CPU can operate at frequencies which are not
> +specified by the manufacturer as CPU's operating frequency.
> +
> +Optional Properties:
> +- boost-frequencies: list of frequencies in KHz to be used only in boost mode.
> +  This list should be a subset of frequencies listed in "operating-points"
> +  property. Refer to Documentation/devicetree/bindings/power/opp.txt for
> +  details about "operating-points" property.
> +
> +Example:
> +
> +       cpus {
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               cpu at 0 {
> +                       device_type = "cpu";
> +                       compatible = "arm,cortex-a9";
> +                       reg = <0>;
> +
> +                       operating-points = <
> +                               1500000 1350000
> +                               1400000 1287500
> +                               1300000 1250000
> +                               1200000 1187500
> +                               1100000 1137500
> +                               1000000 1087500
> +                       >;
> +                       boost-frequencies = <1500000 1400000>;
> +               };
> +               cpu at 1 {
> +                       device_type = "cpu";
> +                       compatible = "arm,cortex-a9";
> +                       reg = <1>;
> +               };
> +       };

Acked-by: Viresh Kumar <viresh.kumar at linaro.org>