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charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220315095716epcas2p2ec52c66863b71180a6c2c45856058683 References: <1647338162-75639-1-git-send-email-kwmad.kim@samsung.com> <1ad26d79-9f5c-9b53-6904-7d7fd53fac2f@acm.org> <000001d894ca$45da51f0$d18ef5d0$@samsung.com> <213634d7-a796-8509-9612-56fe7c61ef01@acm.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > >> Is this behavior specific to the Exynos controller or is this > >> behavior required by the UFSHCI specification? In the latter case, > >> can you tell me where to find this requirement in the UFSHCI > >> specification? I haven't found that requirement yet. Maybe this means > that I overlooked something? > > > > This is needed because those SFRs are ROC (Read to Clear) type. > > That means reading causes clearing contexts. > > The SFRs are mainly read in interrupt context but the reading is also > done in dump. > The above repeats what I can find in the patch description but doesn't > answer my question :-( >=20 > Bart. It's definitely not Exynos specific because the fact that those SFRs are ROC type is written in UFSHCI. I don't know more things to explain why this patch is needed. You just want to know whether any additional descriptions about ROC is writ= ten ? Thanks. Kiwoong Kim