On Sun, 12 Jun 2022 23:09:07 +0200 Jernej Škrabec <jernej.skrabec@xxxxxxxxx> wrote: Hi Samuel, > Dne torek, 31. maj 2022 ob 06:50:35 CEST je Samuel Holland napisal(a): > > This series is preparation for converting the PRCM MFD and legacy clock > > drivers to a CCU clock driver. May I ask what the purpose of this exercise is? So if I understand correctly, then it's about to convert the sun8i-a23-prcm MFD driver and its children to a single "modern style" CCU clock driver, with its opaque DT node? If that changes the compatible strings or the references to the clock providers (and I guess it would need to?), then this would mean an incompatible change. Which also means we would need to keep the old code around, to maintain compatibility with "old" DTs? So what is the win then? Now we have *two* clock drivers, for the same device, which need maintenance and testing. So can you confirm that this will be a breaking change? > The platform SMP code references the PRCM > > node to map its MMIO space, which will break when the PRCM node is > > removed/replaced. > > Why can't we just leave old platform code? If older dtb file is used, it would > still work. Actually, isn't trivial to support new CCU binding too, just by > including new CCU compatible string? IIUC new CCU node will have same address > as current PRCM node. This aims for a similar direction, though in this case the alternative (PSCI) predates the sunxi specific method in the kernel support. Can we just deprecate this code, maybe issue a warning, with the hint to update the bootloader (which might not be possible for some devices)? Cheers, Andre > Best regards, > Jernej > > > > > Since PSCI has been available for 7+ years, instead of trying to deal > > with the migration, I think it's safe to just delete this code. > > > > > > Samuel Holland (3): > > ARM: sunxi: Remove A31 and A23/A33 platform SMP code > > ARM: dts: sunxi: Remove obsolete CPU enable methods > > dt-bindings: arm: Remove obsolete CPU enable methods > > > > .../devicetree/bindings/arm/cpus.yaml | 2 - > > arch/arm/boot/dts/sun6i-a31.dtsi | 1 - > > arch/arm/boot/dts/sun8i-a23-a33.dtsi | 1 - > > arch/arm/mach-sunxi/Makefile | 1 - > > arch/arm/mach-sunxi/platsmp.c | 194 ------------------ > > 5 files changed, 199 deletions(-) > > delete mode 100644 arch/arm/mach-sunxi/platsmp.c > > > > -- > > 2.35.1 > > > > > > >
