From patchwork Tue May 15 15:08:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 913727 X-Patchwork-Delegate: boris.brezillon@free-electrons.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OwC8Mcd7"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40lgxN6XcYz9rxs for ; Wed, 16 May 2018 01:10:48 +1000 (AEST) 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=avdqjvaD96/XYc7DEHFYiI0+2vm0suyc2YOM+ECNvs8=; b=OwC8Mcd7+9KXLeTZh2ZFBZtETB JTw4mXRSlLz+etlcHh8Oll9u/Amk9bDX1iW4DAd1znQphLqKVhXc0Sz2hQuWWtA3c9v1eWqZIgfF1 E/E5UUce/OaRfQx1JjkZQEIuO7bynwMSy78rFh0G8wcYzbTnyV8D3TA3BN6SyUE+b2jcAIIjZ+S0L mK5NjiN2ycnQa++y2Rw2qDh/2zsrHs8Bz8lpznB7cCvJV7BloacrTRuxNAXvT1Hex1ltsb4+mWiLr NdXC37C9omX30qOCkZBporiWo8Hz5t/9XwmUg7gQkaOyrRKpjGLdu/D47IXLExOAlc7s4C9wG1wf6 yh5gpHOw==; 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 1fIbb4-0001p5-Iv; Tue, 15 May 2018 15:10:38 +0000 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fIbZQ-0008L7-47 for linux-mtd@lists.infradead.org; Tue, 15 May 2018 15:09:12 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 9E1B9208BC; Tue, 15 May 2018 17:08:43 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.bootlin.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.bootlin.com (Postfix) with ESMTPSA id BAE37208C1; Tue, 15 May 2018 17:08:28 +0200 (CEST) From: Boris Brezillon To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , linux-mtd@lists.infradead.org, Miquel Raynal Subject: [PATCH v7 3/5] dt-bindings: Add bindings for SPI NAND devices Date: Tue, 15 May 2018 17:08:23 +0200 Message-Id: <20180515150825.19835-4-boris.brezillon@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180515150825.19835-1-boris.brezillon@bootlin.com> References: <20180515150825.19835-1-boris.brezillon@bootlin.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180515_080856_364587_E4190F4C X-CRM114-Status: GOOD ( 15.56 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [62.4.15.54 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Pan , Frieder Schrempf , Vignesh R , Xiangsheng Hou MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Add bindigns for SPI NAND chips. Signed-off-by: Boris Brezillon --- Documentation/devicetree/bindings/mtd/spi-nand.txt | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/spi-nand.txt diff --git a/Documentation/devicetree/bindings/mtd/spi-nand.txt b/Documentation/devicetree/bindings/mtd/spi-nand.txt new file mode 100644 index 000000000000..d55f80196c63 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/spi-nand.txt @@ -0,0 +1,27 @@ +SPI NAND flash + +Required properties: +- compatible: should be "spi-nand" +- reg: should encode the chip-select line used to access the NAND chip + +Optional properties +- spi-max-frequency: maximum frequency of the SPI bus the chip can operate at. + This should encode board limitations (i.e. max freq can't + be achieved due to crosstalk on IO lines). + When unspecified, the driver assumes the chip can run at + the max frequency defined in the spec (information + extracted chip detection time). +- spi-tx-bus-width: The bus width (number of data wires) that is used for MOSI. + Only encodes the board constraints (i.e. when not all IO + signals are routed on the board). Device constraints are + extracted when detecting the chip, and controller + constraints are exposed by the SPI mem controller. If this + property is missing that means no constraint at the board + level. +- spi-rx-bus-width: The bus width (number of data wires) that is used for MISO. + Only encodes the board constraints (i.e. when not all IO + signals are routed on the board). Device constraints are + extracted when detecting the chip, and controller + constraints are exposed by the SPI mem controller. If this + property is missing that means no constraint at the board + level.