From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58EC7C64EBC for ; Thu, 4 Oct 2018 09:18:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2746521470 for ; Thu, 4 Oct 2018 09:18:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2746521470 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727722AbeJDQKz (ORCPT ); Thu, 4 Oct 2018 12:10:55 -0400 Received: from mail.bootlin.com ([62.4.15.54]:58280 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727030AbeJDQKz (ORCPT ); Thu, 4 Oct 2018 12:10:55 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id CF121208B5; Thu, 4 Oct 2018 11:18:31 +0200 (CEST) Received: from bbrezillon (AAubervilliers-681-1-28-153.w90-88.abo.wanadoo.fr [90.88.148.153]) by mail.bootlin.com (Postfix) with ESMTPSA id 7AE152072C; Thu, 4 Oct 2018 11:18:21 +0200 (CEST) Date: Thu, 4 Oct 2018 11:18:22 +0200 From: Boris Brezillon To: Yogesh Gaur Cc: linux-mtd@lists.infradead.org, marek.vasut@gmail.com, vigneshr@ti.com, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, robh@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, linux-arm-kernel@lists.infradead.org, computersforpeace@gmail.com, frieder.schrempf@exceet.de, linux-kernel@vger.kernel.org Subject: Re: [PATCH 4/4] arm64: dts: lx2160a: update fspi node Message-ID: <20181004111822.48ab1f5c@bbrezillon> In-Reply-To: <1538642920-3843-5-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1538642920-3843-1-git-send-email-yogeshnarayan.gaur@nxp.com> <1538642920-3843-5-git-send-email-yogeshnarayan.gaur@nxp.com> X-Mailer: Claws Mail 3.15.0-dirty (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 4 Oct 2018 14:18:40 +0530 Yogesh Gaur wrote: > Flash mt35xu512aba connected to FlexSPI controller supports > 1-1-8 protocol. > Added flag spi-rx-bus-width and spi-tx-bus-width with values as > 8 and 1 respectively for both flashes connected at CS0 and CS1. > > Signed-off-by: Yogesh Gaur > --- > arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts > index 901ca346..817175a 100644 > --- a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts > +++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts > @@ -42,6 +42,8 @@ > m25p,fast-read; > spi-max-frequency = <20000000>; > reg = <0>; > + spi-rx-bus-width = <8>; > + spi-tx-bus-width = <1>; Why 1? The flash is already flagged with SPI_NOR_OCTAL_READ, which means only the read path will use 1-1-8 mode, so you can safely set spi-tx-bus-width here and let the framework choose the appropriate mode based on the flash capabilities. > }; > > mt35xu512aba1: flash@1 { > @@ -51,6 +53,8 @@ > m25p,fast-read; > spi-max-frequency = <20000000>; > reg = <1>; > + spi-rx-bus-width = <8>; > + spi-tx-bus-width = <1>; > }; > }; >