On Wed, Jan 9, 2013 at 9:06 PM, Abhilash Kesavan <a.kesa...@samsung.com> wrote:
> PPMU is required by the devfreq driver. Add a device tree
> node for it.
>
> Signed-off-by: Abhilash Kesavan <a.kesa...@samsung.com>
> Cc: Jonghwan Choi <jhbird.c...@samsung.com>
> Cc: Kukjin Kim <kgene....@samsung.com>
Acked-by: MyungJoo Ham <myungjoo....@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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