From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Fernandes Subject: Re: [PATCH 6/7] ARM: OMAP: Disable POSTED mode for errata i103 and i767 Date: Mon, 25 Nov 2013 16:17:55 -0600 Message-ID: <5293CC93.6040603@ti.com> References: <1385415876-12387-1-git-send-email-joelf@ti.com> <1385415876-12387-7-git-send-email-joelf@ti.com> <20131125221437.GW10023@atomide.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bear.ext.ti.com ([192.94.94.41]:59042 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751102Ab3KYWST (ORCPT ); Mon, 25 Nov 2013 17:18:19 -0500 In-Reply-To: <20131125221437.GW10023@atomide.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Tony Lindgren Cc: Linux ARM Kernel List , linux-omap@vger.kernel.org, Linux Kernel Mailing List , Santosh Shilimkar On 11/25/2013 04:14 PM, Tony Lindgren wrote: > * Joel Fernandes [131125 13:46]: >> Enabling of Posted mode is seen to cause problems on dmtimer modules on AM33xx >> (much like other OMAPs). Reference discussions on forums [1] [2]. Earlier >> patch solving this on other OMAPs [3]. >> >> For OMAP SoCs with this errata, the fix has been to not enable Posted mode. >> However, on some SoCs (atleast AM33xx) which carry this errata, Posted mode >> is enabled on reset. So we not only need to ignore enabling of the POSTED bit >> when the timer is requested, but also disable Posted mode if errata is present. > > This could explain some occasional lost timers I saw a while back when > testing things.. We most likely should merge for the -rc series with cc stable. Sure, I agree. > > Does this depend on the other patches in this series? > No it doesn't depend. thanks, -Joel