This series adds cpufreq support to the Allwinner H616 SoC. v5 just removes the explicit H700 speedbin support, as this proved to be problematic/unstable in testing. The rest is the same as v4. This is based on Martin's original series from about half a year ago[1]. Thanks for the comments on the list! See below for a changelog. ================= The various H616 chips seem to be qualified by production batches, and there is a table that translates from some efuses values to actual speed bin indexes. 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. So while the H6 had explicit speed bin indexes in the efuses, this is conceptually not that different, and after refactoring patch 4/8 this can be neatly integrated into the existing (H6) sun50i-cpufreq-nvmem driver. 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. Based on sunxi/for-next, which is based on v6.9-rc1. Please have a look! Cheers, Andre [1] https://lore.kernel.org/linux-sunxi/20230904-cpufreq-h616-v1-0-b8842e525c43@xxxxxxxxxxxxxx/T/#u Changelog v4 .. v5: - remove H700 nvmem value and OPPs Changelog v3 .. v4: - add Review and Ack tags - allow to compile without CONFIG_HAVE_ARM_SMCCC_DISCOVERY - limit opp-supported-hw array length to 1 - drop unneeded pipe after description in binding - reorder variables in reverse christmas tree in refactor patch Changelog v2 .. v3: - rebased on top of v6.9-rc1 - drop node name suffix from DT bindings - drop multiple nodes per frequency in DT bindings example - add H700 nvmem value and OPPs - print warning for unknown nvmem values - add #cooling-cells properties to CPU DT nodes - use one DT node per frequency for OPP table entries - include OPP table for newly added Longan board Changelog v1 .. v2: - extend commit messages - add H618/H700 SoC IDs - fix binding compatible enum - fix binding documentation - allow additional suffix to OPP node name - shorten existing DT binding example - add another (opp-supported-hw) binding example - move speed bin decoding refactoring to separate patch (Brandon) - move opp-supported-hw support to separate patch - merge opp-supported-hw and microvolt suffix handling - rewrite OPP tables without opp-microvolt-speed suffix 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 | 87 ++++---- .../sun50i-h616-bigtreetech-cb1.dtsi | 5 + .../dts/allwinner/sun50i-h616-cpu-opp.dtsi | 115 ++++++++++ .../allwinner/sun50i-h616-orangepi-zero2.dts | 5 + .../dts/allwinner/sun50i-h616-x96-mate.dts | 5 + .../arm64/boot/dts/allwinner/sun50i-h616.dtsi | 8 + .../sun50i-h618-longan-module-3h.dtsi | 5 + .../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 | 203 +++++++++++++++--- drivers/firmware/smccc/smccc.c | 1 + 13 files changed, 375 insertions(+), 77 deletions(-) create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h616-cpu-opp.dtsi -- 2.25.1
