From patchwork Fri Apr 26 08:13:55 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dirk Behme X-Patchwork-Id: 2491311 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) by patchwork1.kernel.org (Postfix) with ESMTP id 0930E3FC64 for ; Fri, 26 Apr 2013 08:15:22 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UVdno-0008J3-Rg; Fri, 26 Apr 2013 08:14:45 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UVdna-0004gv-FO; Fri, 26 Apr 2013 08:14:30 +0000 Received: from smtp6-v.fe.bosch.de ([2a03:cc00:ff0:100::2]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UVdnL-0004fM-Gt for linux-arm-kernel@lists.infradead.org; Fri, 26 Apr 2013 08:14:17 +0000 Received: from vsmta13.fe.internet.bosch.com (unknown [10.4.98.53]) by imta23.fe.bosch.de (Postfix) with ESMTP id 8F4F81580108 for ; Fri, 26 Apr 2013 10:14:04 +0200 (CEST) Received: from localhost (vsgw3.fe.internet.bosch.com [10.4.98.16]) by vsmta13.fe.internet.bosch.com (Postfix) with SMTP id 7112F600F6F for ; Fri, 26 Apr 2013 10:14:04 +0200 (CEST) Received: from SI-HUB1000.de.bosch.com (10.4.103.106) by si-hub02.de.bosch.com (10.3.144.67) with Microsoft SMTP Server (TLS) id 8.3.298.1; Fri, 26 Apr 2013 10:14:00 +0200 Received: from hi-z5661.hi.de.bosch.com (10.34.217.143) by SI-HUB1000.de.bosch.com (10.4.103.106) with Microsoft SMTP Server id 14.3.123.3; Fri, 26 Apr 2013 10:14:00 +0200 Received: from hi-z5661.hi.de.bosch.com (localhost [127.0.0.1]) by hi-z5661.hi.de.bosch.com (Postfix) with ESMTP id 14FEB40E4C; Fri, 26 Apr 2013 10:14:00 +0200 (CEST) From: Dirk Behme To: Subject: [PATCH 1/2] ARM: dts: i.MX6: configure L2 cache data and tag latency Date: Fri, 26 Apr 2013 10:13:55 +0200 Message-ID: <1366964036-17275-1-git-send-email-dirk.behme@de.bosch.com> X-Mailer: git-send-email 1.8.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130426_041416_162030_05264EB4 X-CRM114-Status: UNSURE ( 9.92 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Dirk Behme , Shawn Guo X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Configure the data and tag latency for the L2 cache. This improves the system performance. This configuration is taken from Freescale's kernel patch "ENGR00153601 [MX6]Adjust L2 cache parameter" [1] which does writel(0x132, IO_ADDRESS(L2_BASE_ADDR + L2X0_TAG_LATENCY_CTRL)); writel(0x132, IO_ADDRESS(L2_BASE_ADDR + L2X0_DATA_LATENCY_CTRL)); In this patch we are doing the same via the device tree. Signed-off-by: Dirk Behme CC: Shawn Guo [1] http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/commit/arch/arm/mach-mx6/mm.c?h=imx_3.0.35_12.09.01&id=814656410b40c67a10b25300e51b0477b2bb96d1 --- arch/arm/boot/dts/imx6qdl.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi index 281a223..3e8381d 100644 --- a/arch/arm/boot/dts/imx6qdl.dtsi +++ b/arch/arm/boot/dts/imx6qdl.dtsi @@ -100,6 +100,8 @@ interrupts = <0 92 0x04>; cache-unified; cache-level = <2>; + arm,tag-latency = <4 2 3>; + arm,data-latency = <4 2 3>; }; aips-bus@02000000 { /* AIPS1 */