PPMU is required by the devfreq driver. Add a device tree
node for it.
Signed-off-by: Abhilash Kesavan <[email protected]>
Acked-by: MyungJoo Ham <[email protected]>
Cc: Jonghwan Choi <[email protected]>
Cc: Kukjin Kim <[email protected]>
---
Changes since v3:
* Modified the dt bindings as per updated devfreq driver
Changes before v3:
* No change
Tested after merging for-rafael branch of
git://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq.git
with for-next branch of
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung.git
.../bindings/arm/exynos/ppmu-exynos5.txt | 24 ++++++++++++++++++++
arch/arm/boot/dts/exynos5250.dtsi | 5 ++++
2 files changed, 29 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..06d40d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/exynos/ppmu-exynos5.txt
@@ -0,0 +1,24 @@
+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 Right PPMU and length of memory mapped
+ region
+
+Example:
+--------
+
+ ppmu {
+ compatible = "samsung,exynos5250-ppmu";
+ reg = <0x13660000 0x2000>;
+ };
diff --git a/arch/arm/boot/dts/exynos5250.dtsi
b/arch/arm/boot/dts/exynos5250.dtsi
index 30485de..96ef6ed 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -732,4 +732,9 @@
interrupt-parent = <&combiner>;
interrupts = <24 1>;
};
+
+ ppmu {
+ compatible = "samsung,exynos5250-ppmu";
+ reg = <0x13660000 0x2000>; /* PPMU_DDR_RIGHT */
+ };
};
--
1.7.8.6
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