Hello, I'm trying to get an Odroid XU4 to run a more recent (e.g. 4.4+) kernel than the last semiofficial 4.2 port from hardkernel (which doesn't boot here at all). Currently (thanks to a lot of patches from you guys) the board boots happily with a kernel build from linux-next. Nonetheless the CPU performance is rather poor, though all 8 cores are enabled (no b/l switcher). It seems to me the Cortex A15s are running in their slowest performance mode (that is: lowest clock). I don't know a way to read the core clocks, as no cpufreq driver is working. Tried that also with exynos_defconfig, but with the same effect. My question therefore is: Is Bartlomiej's cpufreq-dt patchset for exynos54xx (last update was mid-December) necessary to obtain the full performance on the 5422? Unfortunately I can't get that patchset to work with the linux-next from within the last two weeks. If there's an update I would volunteer to test it thoroughly (by compiling Gentoo on it ;) on the XU4. Another point: The XU4's SD card controller supports UHS mode (tested by booting the original ubuntu with an ancient 3.x kernel on the emmc flash and reading from a UHS SD card), the current linux mainline kernel (4.4+) apparently doesn't either detect or enable UHS mode. The maximum SD speed is around 20MB/s instead of the 90MB/s the card supports and was shown with the test above. Is there patch available (maybe some missing dt clock or flag to enable UHS)? Kind regards, Vasco -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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