This series adds a new devfreq driver for the MBUS/DRAM controller in some Allwinner SoCs, and enables it for the A64 and H5. The binding and DTs are updated in patches 1-5. The MBUS nodes already existed, but were not bound to any driver before; they were only used for their dma-ranges property. Finally, the driver is added in patch 6. I am not quite sure the best way to handle DRAM register range in the DT binding -- as a separate reg property, a separate node, or simply enlarging the MBUS register range. While the DRAM controller is a separate IP block, the MBUS hardware has the ability to double-buffer certain DRAM controller registers, and the hardware MDFS process writes to some DRAM controller registers as well. So they are rather tightly integrated. Like the driver commit description says, this driver could support additional SoCs: at least A33, A83T, and H3. I can send follow-up patches adding compatibles for these, but I cannot test A33 or A83T. Changes from v2: - Remove unnecessary quotes from binding - Fix issues with overall minItems/maxItems limits - Added tags Changes from v1: - Patch 1 was merged - Drop patches 2-4 (support for devfreq drivers without OPPs) - Convert the driver to use dynamic OPPs Samuel Holland (6): dt-bindings: clock: sunxi: Export CLK_DRAM for devfreq dt-bindings: arm: sunxi: Expand MBUS binding dt-bindings: arm: sunxi: Add H5 MBUS compatible ARM: dts: sunxi: h3/h5: Update MBUS node arm64: dts: allwinner: a64: Update MBUS node PM / devfreq: Add a driver for the sun8i/sun50i MBUS .../arm/sunxi/allwinner,sun4i-a10-mbus.yaml | 91 +++- arch/arm/boot/dts/sun8i-h3.dtsi | 4 + arch/arm/boot/dts/sunxi-h3-h5.dtsi | 11 +- arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 10 +- arch/arm64/boot/dts/allwinner/sun50i-h5.dtsi | 4 + drivers/clk/sunxi-ng/ccu-sun50i-a64.h | 2 - drivers/clk/sunxi-ng/ccu-sun8i-h3.h | 2 - drivers/devfreq/Kconfig | 8 + drivers/devfreq/Makefile | 1 + drivers/devfreq/sun8i-a33-mbus.c | 511 ++++++++++++++++++ include/dt-bindings/clock/sun50i-a64-ccu.h | 2 +- include/dt-bindings/clock/sun8i-h3-ccu.h | 2 +- 12 files changed, 634 insertions(+), 14 deletions(-) create mode 100644 drivers/devfreq/sun8i-a33-mbus.c -- 2.32.0
