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Message-ID: <CAGo_u6qt2qqsxRSdJM26g6_UHObTQQTyPin0fU_1fOViAqW8Lg@mail.gmail.com> Date: Wed, 5 Feb 2014 11:41:31 -0600 From: Nishanth Menon <nm@...com> To: Grygorii Strashko <grygorii.strashko@...com>, Dan Murphy <dmurphy@...com> Cc: Illia Smyrnov <illia.smyrnov@...ballogic.com>, BenoƮt Cousson <bcousson@...libre.com>, Paul Walmsley <paul@...an.com>, Tony Lindgren <tony@...mide.com>, Russell King <linux@....linux.org.uk>, lkml <linux-kernel@...r.kernel.org>, linux-omap <linux-omap@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, Roger Quadros <rogerq@...com>, Rajendra Nayak <rnayak@...com> Subject: Re: [PATCH] ARM: OMAP4: hwmod: Fix SOFTRESET logic for OMAP4 2014-02-05 Grygorii Strashko <grygorii.strashko@...com>: > Hi All, > On 02/05/2014 05:06 PM, Illia Smyrnov wrote: >> Commit 313a76e (ARM: OMAP2+: hwmod: Fix SOFTRESET logic) introduced >> softreset bit cleaning right after set one. It is caused L3 error for >> OMAP4 ISS because ISS register write occurs when ISS reset process is in >> progress. Avoid this situation by cleaning softreset bit later, when reset >> process is successfully finished. > > I'd like to mention that this issue has been caught while upgrading > custom Linux Kernel 3.4 to the last Stable Kernel linux-3.4.y. > So, the same OMAP4+ functionality can be broken in all Stable trees > where commit "ARM: OMAP2+: hwmod: Fix SOFTRESET logic" was merged to. > > On OMAP4+ we should always try to wait until IP reset is finished before proceed. > > Reviewed-by: "Grygorii Strashko <grygorii.strashko@...com>" > > Error log example (k3.4): > Thanks - I for a moment thought it was on newer kernels :). Looping in Dan who is currently looking at reset driver replacement for existing hwmod based reset solution. Regards, Nishanth Menon -- 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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