Messages in this thread Patch in this message | | | From | Abhilash Kesavan <> | Subject | [PATCH v4 1/4] ARM: EXYNOS5: Add PPMU device tree support | Date | Fri, 18 Jan 2013 18:53:14 +0530 |
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PPMU is required by the devfreq driver. Add a device tree node for it.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Cc: Jonghwan Choi <jhbird.choi@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> --- 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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