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Date: Thu, 24 Apr 2014 17:00:28 +0530 From: Tushar Behera <tushar.behera@...aro.org> To: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> CC: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org, rui.zhang@...el.com, eduardo.valentin@...com Subject: Re: [PATCH] thermal: samsung: Only update available threshold limits On 04/24/2014 04:18 PM, Bartlomiej Zolnierkiewicz wrote: > > Hi, > > On Monday, April 14, 2014 11:08:15 AM Tushar Behera wrote: >> Currently the threshold limits are updated in 2 stages, once for all >> software trigger levels and again for hardware trip point. >> >> While updating the software trigger levels, it overwrites the threshold >> limit for hardware trip point thereby forcing the Exynos core to issue >> an emergency shutdown. > > On what SoC type have you encountered this problem? It doesn't seem to > happen on older SoCs (at least Exynos4210 and Exynos4x12 ones). > I found this issue while testing on Exynos5420 with these patches [1]. [1] https://lkml.org/lkml/2013/8/1/38 >> Updating only the required fields in threshold register fixes this issue. > > With the current code there is indeed a time window during which threshold > limit for hardware trip point is set to zero so the fix is correct. > -- Tushar Behera -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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