From patchwork Fri Jun 1 13:13:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 923993 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="t47Ckxvv"; 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 40y4YZ19GJz9s1w for ; Fri, 1 Jun 2018 23:14:42 +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:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=lbU4wk4ujpdvEiTll7kTyEVT78Krn6mOXAOF6KpIotc=; b=t47CkxvvBzJB5S K3CPVib9cZAoYHzcE0acJvfOk5MR7mckKzRX+rrNPAyyyJQjQO6Qq/oWJ7sTNIZL3LgR2pk6aBmZI Vs/ZF1nhN03SVGWsRnKNeHJ+T0oUCttm3BcQvGLKfGo24CSclfXzXolVWCLXLPWAeiD+Tom9WCx4O PuFRGMa9Gft6qg3VfAgdKGLQckL7HvLLEWkR7Zzxb4MpNGBW3jPzEmVVcope18XLARwdaR1fq44te J1rQvHGblCQGqbt6VLgMBfo103bX/17UYKmm2dqklTmAugFY9aAqaUCpOFp05qXwlIbOH3SyNqM0t m7CCCRWozqtjOzQzCDNg==; 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 1fOjt5-0004BK-1P; Fri, 01 Jun 2018 13:14:35 +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 1fOjsz-0003wO-66 for linux-mtd@lists.infradead.org; Fri, 01 Jun 2018 13:14:31 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 7C9B320702; Fri, 1 Jun 2018 15:14:18 +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, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost.localdomain (AAubervilliers-681-1-125-111.w90-88.abo.wanadoo.fr [90.88.63.111]) by mail.bootlin.com (Postfix) with ESMTPSA id 253FC20726; Fri, 1 Jun 2018 15:14:08 +0200 (CEST) From: Boris Brezillon To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , linux-mtd@lists.infradead.org, Miquel Raynal , Mark Brown , linux-spi@vger.kernel.org, Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , devicetree@vger.kernel.org Subject: [PATCH v8 2/4] dt-bindings: Add bindings for SPI NAND devices Date: Fri, 1 Jun 2018 15:13:58 +0200 Message-Id: <20180601131400.17634-3-boris.brezillon@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180601131400.17634-1-boris.brezillon@bootlin.com> References: <20180601131400.17634-1-boris.brezillon@bootlin.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180601_061429_406074_F7B59E84 X-CRM114-Status: GOOD ( 16.86 ) 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: , MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Add bindings for SPI NAND chips. Signed-off-by: Boris Brezillon --- Changes in v8: - Fixed a typo in the commit message --- 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.