From patchwork Mon Apr 16 07:41:01 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: xiaolei li X-Patchwork-Id: 10342317 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BDCF56039A for ; Mon, 16 Apr 2018 07:41:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A23CB27FAC for ; Mon, 16 Apr 2018 07:41:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9671A284E4; Mon, 16 Apr 2018 07:41:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 46DAF28526 for ; Mon, 16 Apr 2018 07:41:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=jaf+UZrZcNmgc1c2HfBKr7eaRgjOTjmi0+PSo8Pfpfk=; b=kX75xrvOkwS/Qy mceakBs4cn76Iue/U6L02+xEu+Ori7Qi5o82SH/bsx+9IdEML6kVijimahN5j4SHQ8GJoI/ZIZkSF js5LVc+wOw/AmWhkpeiXqWCYrFNYS2FUezfa4+Q5uRYmYByKNLTjjCmHH1SvJVAjmuISiJfdwFemn Qx08OOU4ztb5w5MznG0QbGiqR/Jew0RRavr1hrAJUcrmE6xCZbeSbTaAJhV6HTlT02qZYEKvJovBA KO7JQgPXROYPNzCNPssbm4sDyOoZrrXUK9IjxOWGkinBPf59PxjZjnXgfFd1dXK+vI/CXdTdL7MfB ieh5nmmBk7gb0aBpxtNg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f7ylX-0001sN-AI; Mon, 16 Apr 2018 07:41:31 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f7ylT-0001qQ-PU; Mon, 16 Apr 2018 07:41:29 +0000 X-UUID: 148ddea57e90464287849f8ee9f57566-20180416 Received: from mtkcas09.mediatek.inc [(172.21.101.178)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 591317502; Mon, 16 Apr 2018 15:41:08 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs03n2.mediatek.inc (172.21.101.182) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Mon, 16 Apr 2018 15:41:07 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Mon, 16 Apr 2018 15:41:06 +0800 From: Xiaolei Li To: , Subject: [PATCH v2 1/4] dt-bindings: mtd: mtk-nand: Update properties description Date: Mon, 16 Apr 2018 15:41:01 +0800 Message-ID: <1523864464-41059-2-git-send-email-xiaolei.li@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1523864464-41059-1-git-send-email-xiaolei.li@mediatek.com> References: <1523864464-41059-1-git-send-email-xiaolei.li@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180416_004127_981603_D65A99F3 X-CRM114-Status: UNSURE ( 9.65 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mediatek@lists.infradead.org, xiaolei.li@mediatek.com, linux-mtd@lists.infradead.org, srv_heupstream@mediatek.com Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Update ecc step size, ecc strength, and parity bits supported on each MTK NAND controller. Signed-off-by: Xiaolei Li --- Documentation/devicetree/bindings/mtd/mtk-nand.txt | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/Documentation/devicetree/bindings/mtd/mtk-nand.txt b/Documentation/devicetree/bindings/mtd/mtk-nand.txt index 1c88526..ef786568 100644 --- a/Documentation/devicetree/bindings/mtd/mtk-nand.txt +++ b/Documentation/devicetree/bindings/mtd/mtk-nand.txt @@ -50,14 +50,19 @@ Optional: - nand-on-flash-bbt: Store BBT on NAND Flash. - nand-ecc-mode: the NAND ecc mode (check driver for supported modes) - nand-ecc-step-size: Number of data bytes covered by a single ECC step. - valid values: 512 and 1024. + valid values: + 512 and 1024 on mt2701 and mt2712. + 512 only on mt7622. 1024 is recommended for large page NANDs. - nand-ecc-strength: Number of bits to correct per ECC step. - The valid values that the controller supports are: 4, 6, - 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36, 40, 44, - 48, 52, 56, 60. + The valid values that each controller supports: + mt2701: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, + 32, 36, 40, 44, 48, 52, 56, 60. + mt2712: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, + 32, 36, 40, 44, 48, 52, 56, 60, 68, 72, 80. + mt7622: 4, 6, 8, 10, 12, 14, 16. The strength should be calculated as follows: - E = (S - F) * 8 / 14 + E = (S - F) * 8 / B S = O / (P / Q) E : nand-ecc-strength. S : spare size per sector. @@ -66,6 +71,9 @@ Optional: O : oob size. P : page size. Q : nand-ecc-step-size. + B : parity bits to do 1 bit ECC. + Be 14 on mt2701 and mt2712. + Be 13 on mt7622. If the result does not match any one of the listed choices above, please select the smaller valid value from the list.