PPMU is required by the exynos5250 devfreq driver. Add a device
tree node for it.
Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
---
.../bindings/arm/exynos/ppmu-exynos5.txt | 27 ++++++++++++++++++++
arch/arm/boot/dts/exynos5250.dtsi | 8 ++++++
2 files changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/exynos/ppmu-exynos5.txt
diff --git a/Documentation/devicetree/bindings/arm/exynos/ppmu-exynos5.txt b/Documentation/devicetree/bindings/arm/exynos/ppmu-exynos5.txt
new file mode 100644
index 0000000..08a4aaf
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/exynos/ppmu-exynos5.txt
@@ -0,0 +1,27 @@
+Exynos PPMU driver
+-------------------
+
+Performance events are primitive values used to get performance data. These
+events provide information about the behavior of the SoC that can be used
+when analyzing system performance. These events are made visible using the
+PPMU logic.
+Exynos PPMU driver is used by the exynos5 devfreq drivers to control the
+bus frequency/voltage.
+
+Required properties:
+- compatible: "samsung,exynos5250-int-busfreq", "samsung,exynos5420-int-busfreq"
+- reg:
+ * physical base address of the PPMUs (e.g DDR, Right Bus, Left bus etc)
+ and length of memory mapped region.
+
+Example:
+--------
+
+ ppmu {
+ compatible = "samsung,exynos5250-int-busfreq";
+ reg = <0x10C40000 0x2000
+ 0x10C50000 0x2000
+ 0x10C60000 0x2000
+ 0x10CB0000 0x2000
+ 0x13660000 0x2000>;
+ };
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index 68a3e6f..f20355a 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -750,4 +750,12 @@
clocks = <&clock 348>;
clock-names = "secss";
};
+
+ ppmu {
+ compatible = "samsung,exynos5250-int-busfreq";
+ reg = <0x10C40000 0x2000 /* PPMU_DDR_C */
+ 0x10C50000 0x2000 /* PPMU_DDR_L */
+ 0x10CB0000 0x2000 /* PPMU_DDR_R */
+ 0x13660000 0x2000>; /* PPMU_RIGHT */
+ };
};
--
1.7.9.5
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