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    Subject[PATCH 0/5] arm64: dts: Enable bus frequency scaling on Exynos5433-based TM2 board
    Date
    This patches add the AMBA bus Device-tree node unsing VDD_INT
    to enable the bus frequency scaling on Exynos5433-based TM2 board.

    There are two kind of bus device with devfreq framework.
    - Parent bus device : Change the frequency/voltage according to bus's utilization.
    - Passive bus device : Change only frequency according to the new level
    of parent bus device.

    The VDD_INT regulator provides the power source to INT (Internal) block as
    following. The sub-blocks in the INT block share the one power source.
    VDD_INT |--- G2D (parent device)
    |--- MSCL
    |--- GSCL
    |--- JPEG
    |--- MFC
    |--- HEVC
    |--- BUS0
    |--- BUS1
    |--- BUS2
    |--- PERIS (Fixed clock rate)
    |--- PERIC (Fixed clock rate)
    |--- FSYS (Fixed clock rate)

    Each sub-block has the bus clock as following:
    - CLK_ACLK_G2D_{400|266} : Bus clock for G2D
    - CLK_ACLK_MSCL_400 : Bus clock for MSCL (Mobile Scaler)
    - CLK_ACLK_GSCL_333 : Bus clock for GSCL (General Scaler)
    - CLK_SCLK_JPEG_MSCL : Bus clock for JPEG
    - CLK_ACLK_MFC_400 : Bus clock for MFC (Multi Format Codec)
    - CLK_ACLK_HEVC_400 : Bus clock for HEVC (High Effective Video Codec)
    - CLK_ACLK_BUS0_400 : NoC(Network On Chip)'s bus clock for PERIC/PERIS/FSYS/MSCL
    - CLK_ACLK_BUS1_400 : NoC's bus clock for MFC/HEVC/G3D
    - CLK_ACLK_BUS2_400 : NoC's bus clock for GSCL/DISP/G2D/CAM0/CAM1/ISP

    Chanwoo Choi (5):
    clk: samsung: exynos5433: Set NoC (Network On Chip) clocks as critical
    PM / devfreq: exynos-bus: Add the detailed correlation for Exynos5433
    arm64: dts: exynos5433: Add PPMU dt node
    arm64: dts: exynos5433: Add bus dt node using VDD_INT for Exynos5433
    arm64: dts: exynos5433: Add support of bus frequency using VDD_INT on TM2

    .../devicetree/bindings/devfreq/exynos-bus.txt | 14 ++
    arch/arm64/boot/dts/exynos/exynos5433-bus.dtsi | 208 +++++++++++++++++++++
    arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 72 +++++++
    arch/arm64/boot/dts/exynos/exynos5433.dtsi | 25 +++
    drivers/clk/samsung/clk-exynos5433.c | 8 +-
    5 files changed, 323 insertions(+), 4 deletions(-)
    create mode 100644 arch/arm64/boot/dts/exynos/exynos5433-bus.dtsi

    --
    1.9.1

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