2016-01-25 18:54 GMT+09:00 Sriram V <vshrirama@xxxxxxxxx>: > Hi Krzystof, > > Thanks for the clarifications. > > On Wed, Jan 20, 2016 at 7:00 PM, Krzysztof Kozłowski > <k.kozlowski.k@xxxxxxxxx> wrote: >> 2016-01-20 19:35 GMT+09:00 Sriram V <vshrirama@xxxxxxxxx>: >>> Hi Krzysztof, >>> >>> >>> Are you saying that only power domains under "Local Power Control" can >>> be attached to runtime PM and can be turned off? >>> >>> In that case, i dont see other domains such as peris, psgen, wcore in >>> there, Hence these need to be always on? >>> >>> is my understanding correct? >> >> I don't know what kind of documentation you have. Judging by the >> question above I think that you are asking me about interpretation of >> datasheet... Really, your question is very strange... My Exynos5422 >> datasheet is quite specific on this topic. >> Anyway you should ask for that to the vendor of the SoC - Samsung LSI. >> It looks like you are looking for a support which should be given not >> here, but by the vendor (because they sold you the SoC along with the >> code). >> Just to make it clear: I am not related anyhow to the Samsung LSI. I >> am speaking only for myself. >> >> As for the domains, you cannot independently control (under runtime >> PM) all of the domains. Only some of them. Datasheet explicitly >> describes what can be controlled. Other stuff is being turned off when >> entering deeper sleep modes (like AFTR, SLEEP) - you can look for this >> in cpuidle or suspend related code (open-source or vendor's). > > > I could not find in the suspend code where it turns off all the domains on 5422 > in the vendor and linux-next kernel. Am i missing something? > > Or are you referring to some code? Here: http://lxr.free-electrons.com/source/arch/arm/mach-exynos/pmu.c#L443 The exynos5420_pmu_config contains values for PMU registers applied when entering AFTR/LPA (cpuidle) or SLEEP (suspend to RAM) modes. Around line #534 the configuration for power domain starts: http://lxr.free-electrons.com/source/arch/arm/mach-exynos/pmu.c#L534 The array should configure all power domains to certain state (off or on). 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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