This series adds cpufreq support for the Allwinner H616 SoC. This v2 is quite some rework compared to Martin's original series from about half a year ago[1]. The various H616 chips are rated into different speedbins at the factory, the bin index is then burned into the efuses. This is very similar to the H6, though the location of the speedbin fuse and its encoding differs. Also the die revision has a say here, we can derive this from the SoC ID, already provided by TF-A through the SMCCC SoC ID interface. On top of that not all chips are qualified to reach the full 1.5GHz, and the BSP kernel describes different OPPs for each speedbin. This requires to add support for the opp-supported-hw DT property, to be able to describe those requirements properly. Patch 1/8 exports the SoC ID function, so that we can call it from our driver. Patch 2/8 blocks the affected SoCs from the generic DT cpufreq driver, patch 3/8 adds the DT binding documentation. Patch 4/8 refactors the existing speedbin determination for the H6, to be able to plug in the H616 version later more easily. Patch 5/8 adds support for the opp-supported-hw property. This is done in a generic way, so it's usable for other SoCs as well, and the code will figure out if the current DT requires use of this feature. Patch 6/8 then eventually adds the H616 bits to the driver, and ties that to the new compatible string. Patch 7/8 add the CPU OPP table as a .dtsi to the DT directory, the values in there were taken from the BSP source. Patch 8/8 then enables the OPPs for all boards we have DTs for. Please have a look, especially patch 5/8 might need some discussion. This is based on v6.8, with the THS series on top, which should reach mainline in the next days. I plan to send a rebased version after -rc1, but wanted to start the discussion early. Cheers, Andre [1] https://lore.kernel.org/linux-sunxi/20230904-cpufreq-h616-v1-0-b8842e525c43@xxxxxxxxxxxxxx/T/#u Andre Przywara (2): cpufreq: sun50i: Add support for opp_supported_hw arm64: dts: allwinner: h616: enable DVFS for all boards Brandon Cheo Fusi (1): cpufreq: sun50i: Refactor speed bin decoding Martin Botka (5): firmware: smccc: Export revision soc_id function cpufreq: dt-platdev: Blocklist Allwinner H616/618 SoCs dt-bindings: opp: Describe H616 OPPs and opp-supported-hw cpufreq: sun50i: Add H616 support arm64: dts: allwinner: h616: Add CPU OPPs table .../allwinner,sun50i-h6-operating-points.yaml | 89 +++++---- .../sun50i-h616-bigtreetech-cb1.dtsi | 5 + .../dts/allwinner/sun50i-h616-cpu-opp.dtsi | 138 +++++++++++++ .../allwinner/sun50i-h616-orangepi-zero2.dts | 5 + .../dts/allwinner/sun50i-h616-x96-mate.dts | 5 + .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 4 + .../allwinner/sun50i-h618-orangepi-zero2w.dts | 5 + .../allwinner/sun50i-h618-orangepi-zero3.dts | 5 + .../sun50i-h618-transpeed-8k618-t.dts | 5 + drivers/cpufreq/cpufreq-dt-platdev.c | 3 + drivers/cpufreq/sun50i-cpufreq-nvmem.c | 189 +++++++++++++++--- drivers/firmware/smccc/smccc.c | 1 + 12 files changed, 379 insertions(+), 75 deletions(-) create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi -- 2.35.8
