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_400 (parent device) |--- G2D_266 |--- GSCL |--- JPEG |--- HEVC |--- MFC |--- MSCL |--- NoC0 |--- NoC1 |--- NoC2 |--- 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 (2D graphic engine) - CLK_ACLK_MSCL_400 : Bus clock for MSCL (Memory to memory 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 Changes from v1: - Remove duplicate description of exynos5433-bus.dtsi - Move the bus device-tree node under the 'soc' - Modify the node name of bus from 'bus_xxx_xxx' to 'bus[number]' - Reorder the bus device-tree node alpabetically - Change the node name from 'bus_busX' to 'bus_nocX' - Fix minor issue - Add reviewed-by tag of Krzysztof Kozlowski for patch3/5 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 | 15 ++ arch/arm64/boot/dts/exynos/exynos5433-bus.dtsi | 197 +++++++++++++++++++++ arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 70 ++++++++ arch/arm64/boot/dts/exynos/exynos5433.dtsi | 25 +++ drivers/clk/samsung/clk-exynos5433.c | 8 +- 5 files changed, 311 insertions(+), 4 deletions(-) create mode 100644 arch/arm64/boot/dts/exynos/exynos5433-bus.dtsi -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html