From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80FFEC433EF for ; Wed, 15 Sep 2021 06:52:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 44E406103E for ; Wed, 15 Sep 2021 06:52:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 44E406103E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=atomide.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=JhpY/mpgKFwgoMODMtrgl/wjLT2iC/TMT4xjie9oms8=; b=xOO9v6/S76XgZ2 fC33LuBsvSOjKvpFMtWhJu/R+awZMfJKyGwsAO8bvjKeADZefeuq6ENxEUsnMSDJ8RB+Z1dmU4aiX RiF7lpQ6OWeeNdL5wgnrVdJcUu8w5Vbd714kFpJh1rkX4f2vua9q/gOh6Arz14kctK/CPaXCDI0w1 EH4ldw218diQchNPa2izPkqRD8pLg03Wl1LGCQzxTzcRVKNESzJeScjbo3k/0IiXN+L9W1yhBcxWN VjMHAeD+KLH4uYUsV+XnfFT0InM7iXsGT3964nKHJJv5LdEOEd8C+638kOvljnmZYYDn24YCIEd5L UwI7rSTyPN4ZBRpqMhdQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mQOkn-008EjG-LR; Wed, 15 Sep 2021 06:50:45 +0000 Received: from muru.com ([72.249.23.125]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mQOkk-008Eig-0C for linux-arm-kernel@lists.infradead.org; Wed, 15 Sep 2021 06:50:43 +0000 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id 271D680C3; Wed, 15 Sep 2021 06:51:04 +0000 (UTC) From: Tony Lindgren To: linux-omap@vger.kernel.org Subject: [PATCH] bus: ti-sysc: Fix external abort for am335x pruss probe Date: Wed, 15 Sep 2021 09:50:32 +0300 Message-Id: <20210915065032.45013-1-tony@atomide.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210914_235042_126177_BDF9FEA9 X-CRM114-Status: GOOD ( 10.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nishanth Menon , Grygorii Strashko , Dave Gerlach , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Faiz Abbas , Keerthy , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Starting with v5.15-rc1, I'm now seeing am335x beaglebone black produce the following error on pruss probe: Unhandled fault: external abort on non-linefetch (0x1008) at 0xe0326000 This seems to have started with the enabling of pruss for am335x in the dts files. Adding a read-back after write to the sysconfig register fixes the issue for me. Cc: Suman Anna Signed-off-by: Tony Lindgren --- drivers/bus/ti-sysc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -2037,6 +2037,9 @@ static int sysc_reset(struct sysc *ddata) sysc_val = sysc_read_sysconfig(ddata); sysc_val |= sysc_mask; sysc_write(ddata, sysc_offset, sysc_val); + + /* Flush posted write */ + sysc_read_sysconfig(ddata); } if (ddata->cfg.srst_udelay) -- 2.33.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel