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    SubjectRe: [PATCH 1/4] ARM: EXYNOS5: Add PPMU device tree support
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    On Wed, Jan 9, 2013 at 9:06 PM, Abhilash Kesavan <a.kesavan@samsung.com> wrote:
    > 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>

    Acked-by: MyungJoo Ham <myungjoo.ham@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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    --
    MyungJoo Ham, Ph.D.
    Mobile Software Platform Lab, DMC Business, Samsung Electronics


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