On Tue, 18 Feb 2020 11:13:10 -0600 Rob Herring <robh@xxxxxxxxxx> wrote: Hi, > Calxeda has been defunct for 6 years now. Use of Calxeda servers carried > on for some time afterwards primarily as distro builders for 32-bit ARM. > AFAIK, those systems have been retired in favor of 32-bit VMs on 64-bit > hosts. > > The other use of Calxeda Midway I'm aware of was testing 32-bit ARM KVM > support as there are few or no other systems with enough RAM and LPAE. Now > 32-bit KVM host support is getting removed[1]. > > While it's not much maintenance to support, I don't care to convert the > Calxeda DT bindings to schema nor fix any resulting errors in the dts files > (which already don't exactly match what's shipping in firmware). While every kernel maintainer seems always happy to take patches with a negative diffstat, I wonder if this is really justification enough to remove a perfectly working platform. I don't really know about any active users, but experience tells that some platforms really are used for quite a long time, even if they are somewhat obscure. N900 or Netwinder, anyone? So to not give the impression that actually *everyone* (from that small subset of people actively reading the kernel list) is happy with that, I think that having support for at least Midway would be useful. On the one hand it's a decent LPAE platform (with memory actually exceeding 4GB), and on the other hand it's something with capable I/O (SATA) and networking, so one can actually stress test the system. Which is the reason I was using that for KVM testing, but even with that probably going away now there remain still some use cases, and be it for general ARM(32) testing. I don't particularly care about the more optional parts like EDAC, cpuidle, or cpufreq, but I wonder if keeping in at least the rather small SATA and XGMAC drivers and basic platform support is feasible. If YAML DT bindings are used as an excuse, I am more than happy to convert those over. And if anyone has any particular gripes with some code, maybe there is a way to fix that instead of removing it? I was always wondering if we could get rid of the mach-highbank directory, for instance. I think most of it is Highbank (Cortex-A9) related. Cheers, Andre > > Rob > > [1] https://lore.kernel.org/linux-arm-kernel/20200210141324.21090-1-maz@xxxxxxxxxx/ > > Rob Herring (11): > vfio: Remove Calxeda XGMAC reset driver > ata: Remove Calxeda AHCI driver > cpuidle: Remove Calxeda driver > cpufreq: Remove Calxeda driver > EDAC: Remove Calxeda drivers > iommu: arm-smmu: Remove Calxeda secure mode quirk > net: Remove Calxeda XGMAC driver > clk: Remove Calxeda driver > ARM: Remove Calxeda platform support > ARM: dts: Remove Calxeda platforms > dt-bindings: Remove Calxeda platforms bindings > > .../devicetree/bindings/arm/calxeda.yaml | 22 - > .../devicetree/bindings/arm/calxeda/l2ecc.txt | 15 - > .../devicetree/bindings/ata/sata_highbank.txt | 44 - > .../devicetree/bindings/clock/calxeda.txt | 17 - > .../memory-controllers/calxeda-ddr-ctrlr.txt | 16 - > .../devicetree/bindings/net/calxeda-xgmac.txt | 18 - > .../bindings/phy/calxeda-combophy.txt | 17 - > MAINTAINERS | 14 - > arch/arm/Kconfig | 2 - > arch/arm/Kconfig.debug | 12 +- > arch/arm/Makefile | 1 - > arch/arm/boot/dts/Makefile | 3 - > arch/arm/boot/dts/ecx-2000.dts | 103 - > arch/arm/boot/dts/ecx-common.dtsi | 230 -- > arch/arm/boot/dts/highbank.dts | 161 -- > arch/arm/configs/multi_v7_defconfig | 5 - > arch/arm/mach-highbank/Kconfig | 19 - > arch/arm/mach-highbank/Makefile | 4 - > arch/arm/mach-highbank/core.h | 18 - > arch/arm/mach-highbank/highbank.c | 175 -- > arch/arm/mach-highbank/pm.c | 49 - > arch/arm/mach-highbank/smc.S | 25 - > arch/arm/mach-highbank/sysregs.h | 75 - > arch/arm/mach-highbank/system.c | 22 - > drivers/ata/Kconfig | 9 - > drivers/ata/Makefile | 1 - > drivers/ata/sata_highbank.c | 635 ------ > drivers/clk/Makefile | 1 - > drivers/clk/clk-highbank.c | 329 --- > drivers/cpufreq/Kconfig.arm | 10 - > drivers/cpufreq/Makefile | 3 +- > drivers/cpufreq/cpufreq-dt-platdev.c | 3 - > drivers/cpufreq/highbank-cpufreq.c | 106 - > drivers/cpuidle/Kconfig.arm | 7 - > drivers/cpuidle/Makefile | 1 - > drivers/cpuidle/cpuidle-calxeda.c | 72 - > drivers/edac/Kconfig | 14 - > drivers/edac/Makefile | 3 - > drivers/edac/highbank_l2_edac.c | 142 -- > drivers/edac/highbank_mc_edac.c | 272 --- > drivers/iommu/arm-smmu-impl.c | 43 - > drivers/net/ethernet/Kconfig | 1 - > drivers/net/ethernet/Makefile | 1 - > drivers/net/ethernet/calxeda/Kconfig | 9 - > drivers/net/ethernet/calxeda/Makefile | 2 - > drivers/net/ethernet/calxeda/xgmac.c | 1927 ----------------- > drivers/vfio/platform/reset/Kconfig | 8 - > drivers/vfio/platform/reset/Makefile | 2 - > .../reset/vfio_platform_calxedaxgmac.c | 74 - > 49 files changed, 2 insertions(+), 4740 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/arm/calxeda.yaml > delete mode 100644 Documentation/devicetree/bindings/arm/calxeda/l2ecc.txt > delete mode 100644 Documentation/devicetree/bindings/ata/sata_highbank.txt > delete mode 100644 Documentation/devicetree/bindings/clock/calxeda.txt > delete mode 100644 Documentation/devicetree/bindings/memory-controllers/calxeda-ddr-ctrlr.txt > delete mode 100644 Documentation/devicetree/bindings/net/calxeda-xgmac.txt > delete mode 100644 Documentation/devicetree/bindings/phy/calxeda-combophy.txt > delete mode 100644 arch/arm/boot/dts/ecx-2000.dts > delete mode 100644 arch/arm/boot/dts/ecx-common.dtsi > delete mode 100644 arch/arm/boot/dts/highbank.dts > delete mode 100644 arch/arm/mach-highbank/Kconfig > delete mode 100644 arch/arm/mach-highbank/Makefile > delete mode 100644 arch/arm/mach-highbank/core.h > delete mode 100644 arch/arm/mach-highbank/highbank.c > delete mode 100644 arch/arm/mach-highbank/pm.c > delete mode 100644 arch/arm/mach-highbank/smc.S > delete mode 100644 arch/arm/mach-highbank/sysregs.h > delete mode 100644 arch/arm/mach-highbank/system.c > delete mode 100644 drivers/ata/sata_highbank.c > delete mode 100644 drivers/clk/clk-highbank.c > delete mode 100644 drivers/cpufreq/highbank-cpufreq.c > delete mode 100644 drivers/cpuidle/cpuidle-calxeda.c > delete mode 100644 drivers/edac/highbank_l2_edac.c > delete mode 100644 drivers/edac/highbank_mc_edac.c > delete mode 100644 drivers/net/ethernet/calxeda/Kconfig > delete mode 100644 drivers/net/ethernet/calxeda/Makefile > delete mode 100644 drivers/net/ethernet/calxeda/xgmac.c > delete mode 100644 drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c > > > base-commit: 11a48a5a18c63fd7621bb050228cebf13566e4d8 > -- > 2.20.1
