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

Message ID 1400852262-6290-3-git-send-email-thomas.ab@samsung.com
State New
Headers show

Commit Message

Thomas Abraham May 23, 2014, 1:37 p.m.
From: Thomas Abraham <thomas.ab@samsung.com>

Add a new optional boost-frequency binding for specifying the frequencies
usable in boost mode.

Cc: Nishanth Menon <nm@ti.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
---
 .../devicetree/bindings/cpufreq/cpufreq-boost.txt  |   38 ++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt

Comments

Viresh Kumar May 26, 2014, 6:09 a.m. | #1
On 23 May 2014 19:07, Thomas Abraham <thomas.ab@samsung.com> wrote:
> From: Thomas Abraham <thomas.ab@samsung.com>
>
> Add a new optional boost-frequency binding for specifying the frequencies
> usable in boost mode.
>
> Cc: Nishanth Menon <nm@ti.com>
> Cc: Lukasz Majewski <l.majewski@samsung.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Pawel Moll <pawel.moll@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
> Cc: Kumar Gala <galak@codeaurora.org>
> Signed-off-by: Thomas Abraham <thomas.ab@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@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@1 {
> +                       device_type = "cpu";
> +                       compatible = "arm,cortex-a9";
> +                       reg = <1>;
> +               };
> +       };

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

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@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@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <1>;
+		};
+	};