From patchwork Fri Jan 18 04:57:46 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: avinash philip X-Patchwork-Id: 1999101 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id EFFADDF280 for ; Fri, 18 Jan 2013 05:00:17 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Tw415-00071n-2o; Fri, 18 Jan 2013 04:57:23 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Tw411-00071C-UE for linux-arm-kernel@lists.infradead.org; Fri, 18 Jan 2013 04:57:20 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id r0I4vERp032710; Thu, 17 Jan 2013 22:57:14 -0600 Received: from DBDE70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id r0I4v94H009252; Fri, 18 Jan 2013 10:27:10 +0530 (IST) Received: from dbdp32.itg.ti.com (172.24.170.251) by dbde70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 14.1.323.3; Fri, 18 Jan 2013 10:27:09 +0530 Received: from ucmsshproxy.india.ext.ti.com (dbdp20.itg.ti.com [172.24.170.38]) by dbdp32.itg.ti.com (8.13.8/8.13.8) with SMTP id r0I4v22K007436; Fri, 18 Jan 2013 10:27:03 +0530 Received: from symphony.india.ext.ti.com (unknown [192.168.247.13]) by ucmsshproxy.india.ext.ti.com (Postfix) with ESMTP id 7B53E158002; Fri, 18 Jan 2013 10:26:59 +0530 (IST) Received: from ubuntu-psp-linux.india.ext.ti.com (ubuntu-psp-linux [192.168.247.46]) by symphony.india.ext.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id r0I4usR01758; Fri, 18 Jan 2013 10:26:54 +0530 (IST) From: Philip Avinash To: , , , , , Subject: [PATCH] ARM: OMAP: gpmc: Add device tree documentation for elm handle Date: Fri, 18 Jan 2013 10:27:46 +0530 Message-ID: <1358485066-27495-1-git-send-email-avinashphilip@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130117_235720_053045_3203FF8B X-CRM114-Status: UNSURE ( 9.27 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.6 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.152 listed in list.dnswl.org] 3.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: linux-doc@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, nsekhar@ti.com, linux-kernel@vger.kernel.org, gururaja.hebbar@ti.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org In case ELM module available, omap2 NAND driver can opt for hardware correction method for bit flip errors in NAND flash with BCH. Hence the detection of ELM module is done through devicetree population of elm_id. This patch update device tree documentation for gpmc-nand for elm-id data population. Signed-off-by: Philip Avinash --- This patch based [1] and depends on [2]. As Artem suggested, this patch can go in omap_tree due to the dependency on [3]. Discussion can found at [4] Tony, Can you accept this patch. 1. http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap.git;a=shortlog;h=refs/heads/omap-for-v3.9/gpmc 2. mtd: nand: omap2: Support for hardware BCH error correction http://git.infradead.org/users/dedekind/l2-mtd-2.6.git/commit/576daed18c3f27bb5d0e57e1df11e8f7b493dce8 3. ARM: OMAP: gpmc: add DT bindings for GPMC timings and NAND http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap.git;a=commit;h=bc6b1e7b86f5d8e4a6fc1c0189e64bba4077efe0 4. https://lkml.org/lkml/2013/1/17/167 .../devicetree/bindings/mtd/gpmc-nand.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt index 9f464f9..e7f8d7e 100644 --- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt @@ -29,6 +29,9 @@ Optional properties: "bch4" 4-bit BCH ecc code "bch8" 8-bit BCH ecc code + - elm_id: Specifies elm device node. This is required to support BCH + error correction using ELM module. + For inline partiton table parsing (optional): - #address-cells: should be set to 1 @@ -46,6 +49,7 @@ Example for an AM33xx board: #address-cells = <2>; #size-cells = <1>; ranges = <0 0 0x08000000 0x2000>; /* CS0: NAND */ + elm_id = <&elm>; nand@0,0 { reg = <0 0 0>; /* CS0, offset 0 */