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Subject[PATCH 1/4] ARM: EXYNOS5: Add PPMU device tree support
Date
PPMU is required by the devfreq driver. Add a device tree
node for it.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Cc: Jonghwan Choi <jhbird.choi@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
---
.../bindings/arm/exynos/ppmu-exynos5.txt | 28 ++++++++++++++++++++
arch/arm/boot/dts/exynos5250.dtsi | 9 ++++++
2 files changed, 37 insertions(+), 0 deletions(-)
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..a424dfa
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/exynos/ppmu-exynos5.txt
@@ -0,0 +1,28 @@
+Exynos5 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.
+Exynos5 PPMU driver is used by the exynos5 devfreq driver to control the bus
+frequency/voltage.
+
+Required properties:
+- compatible: should be one of the following.
+ * samsung,exynos5-ppmu - for exynos5250 type ppmu.
+- reg:
+ * physical base address of the PPMUs (DDR, Right Bus and CPU) and
+ length of memory mapped region.
+
+Example:
+--------
+
+ ppmu {
+ compatible = "samsung,exynos5250-ppmu";
+ 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 30485de..d504cba 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -732,4 +732,13 @@
interrupt-parent = <&combiner>;
interrupts = <24 1>;
};
+
+ ppmu {
+ compatible = "samsung,exynos5250-ppmu";
+ reg = <0x10C40000 0x2000 /* PPMU_DDR_C */
+ 0x10C50000 0x2000 /* PPMU_DDR_R1 */
+ 0x10CB0000 0x2000 /* PPMU_DDR_L */
+ 0x13660000 0x2000 /* PPMU_DDR_RIGHT */
+ 0x10C60000 0x2000>; /* PPMU_DDR_CPU */
+ };
};
--
1.7.8.6


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