W dniu 13.06.2015 o 18:11, Thomas-Karl Pietrowski pisze: > Am Samstag, 13. Juni 2015, 15:09:32 schrieb Krzysztof Kozlowski: >> W dniu 12.06.2015 o 22:53, Thomas Pietrowski pisze: >>> Hello again, >>> >>> first after fixing my booting problems I now get different warnings after >>> boot. - config: http://pastebin.com/MHUu51pF >>> - log: http://pastebin.com/9YMgMmFL >>> - repo: arm-soc >>> I read the last days that you are still working on the clk drivers, so >>> as these warnings appear to be related to that you might be interested >>> on them. >> >> You mean the warnings on clocks (starting from runtime PM and FIMC)? I >> hit them also on Trats2. Just need to find a person (or time) who will >> fix it... >> > Ok then. I just don't remember that I had them when using 3.19.x code by > Tobias Jakobi before. I'll test his latest code later. The reason I wanted to > use code from arm-soc is that I thought his changes/patches are already here > after two linux releases. However, in the past the CPU fan wasn't working at > all (0 RPM) and /sys/class/thermal/[...]/temp reported more than 70°C (was > compiling a newer kernel code at this moment). Don't believe it was healthy. > >>> Additionally my CPU fan it running at full RPM all the time. I checked >>> the temperature just to be sure and it says it's 20°C. Is this problem >>> known or can I help debugging it? >> >> After quick look at DTS, I think that on Exynos4412 Odroid family there >> is no fan defined. No fan so cooling is done only through CPU >> frequencies. The fan probably works on default setting from bootloader >> or default register values. >> > Just something at this point which comes to my mind. Imagine we have the fan > regulation/driver working. What happens when we simply disconnect the fan and > the CPU hits higher temperatures? Will it still work on high frequencies or > will it self-protect by using lower CPU frequencies? I do not know how the thermal/cooler driver works. I suppose it depends whether cooling device (the pwm-fan) reports non-working fan. You should rather ask on linux-pm@xxxxxxxxxxxxxxx mailing list. That is the place for thermal framework. > CPU throttling and CPU cooling should be two seperate processes, isn't it? Although cpu frequency driver is a separate thing but for cooling it behaves like a cooling device. A fan can be a cooling device. CPU frequency as well. > >> The stock Odroid U3 has only passive cooler. >> > That's true, but they (hardkernel) also sell a optional fan and the socket for > is is still there when buying the board. > See, > http://www.hardkernel.com/main/products/prdt_info.php?g_code=G138760358261 for > the optional fan. > Therefore, it is not a hardware hack or whatever. Right. > >> Probably support for fan could be added... If you would like to take >> care of it, go for it! :) >> > I just browsed Tobias Jakobi's "linux-odroid" repository at github and found > out, that work is already made on that by people at Samsung :) > https://github.com/tobiasjakobi/linux-odroid/commit/a2236c8f74321357e505be0a054032325a7e3a5d > Hopefully both are also in this mailing list and interested in getting this > upstream. In the mean time I'll test it based on tobiasjakobi's codebase > again. I wonder why this is not in mainline... Or maybe it is? Best regards, Krzysztof -- 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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