Hi, On Tuesday, July 08, 2014 11:15:21 PM Kukjin Kim wrote: > Tomasz Figa wrote: > > > > Currently, the Exynos cpuidle driver works correctly only on Exynos4210 > > and 5250. Trying to use it with just one CPU online on any other Exynos > > SoC will lead to system failure, due to unsupported AFTR mode on other > > SoCs. This patch fixes the problem by registering the driver only on > > supported SoCs and letting others simply use default WFI mode until > > support for them is added. > > > Hmm...I thought other SoCs have no problem on cpuidle except exynos5420 and > exynos5440....something like this would be helpful to avoid system failure. > But unfortunately this conflicts with Pankaj's cleanup cpufreq_init() and > cpuidle_init() patch you've reviewed and I've applied in my local... > > I'm going to check which exynos is ok on cpuidle and then sort them out. Tomasz's patch is correct - currently only Exynos4210 and Exynos5250 work fine with AFTR mode and upstream kernel (AFTR gets triggered by offlining CPUs other than CPU0). [ Exynos4x12 and Exynos3250 need secure firmware support (patches for this need to be reworked on top of recent PM/firmware/cpuidle changes). Exynos5410 should use big_little cpuidle driver. ] Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics -- 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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