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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




From: Thomas Abraham <thomas.ab@xxxxxxxxxxx>

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

Cc: Nishanth Menon <nm@xxxxxx>
Cc: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Signed-off-by: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
---
 .../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>;
+		};
+	};
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux