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[2620:137:e000::1:20]) by mx.google.com with ESMTP id r20-20020a056402235400b00427cb81f020si2110771eda.250.2022.05.13.08.37.31; Fri, 13 May 2022 08:37:59 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@walle.cc header.s=mail2016061301 header.b=rDLw+uO7; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379803AbiEMLLV (ORCPT + 99 others); Fri, 13 May 2022 07:11:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379798AbiEMLLS (ORCPT ); Fri, 13 May 2022 07:11:18 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [176.9.125.105]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6E6DE5A5B2 for ; Fri, 13 May 2022 04:11:17 -0700 (PDT) Received: from ssl.serverraum.org (web.serverraum.org [172.16.0.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id E8EDB221D4; Fri, 13 May 2022 13:11:14 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1652440275; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9pV4ceZp2jBzmUpp2ZHmANTNVPZNX+S/qtaNuz/v8JU=; b=rDLw+uO7mxnfh6PH1ONHS1YDxUz4UVpEUka9QoM0qVf0lttGaNZJ2nZqi8qa8GBqX+HS2v oihlqaATznXfoDhAwwgXq8eDqu8EHRir1NhFr/lpQM6kXGelXOEpFvY1GsMm7LmAlj/MVT ugKmU5Gl6v/74YvYSorP0qDGsUHxaX8= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Fri, 13 May 2022 13:11:14 +0200 From: Michael Walle To: Alexander A Sverdlin Cc: linux-mtd@lists.infradead.org, Tudor Ambarus , Pratyush Yadav , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , linux-kernel@vger.kernel.org Subject: Re: [PATCH] mtd: spi-nor: Support Dual and Quad Read on Macronix mx25u25635f In-Reply-To: <20220513094759.44185-1-alexander.sverdlin@nokia.com> References: <20220513094759.44185-1-alexander.sverdlin@nokia.com> User-Agent: Roundcube Webmail/1.4.13 Message-ID: <34eccc66cc75dd0ffbf8a77780b6f8a7@walle.cc> X-Sender: michael@walle.cc X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Am 2022-05-13 11:47, schrieb Alexander A Sverdlin: > From: Alexander Sverdlin > > According to datasheet both Dual and Quad Read is supported. The read > test > shows x3.8 speed gain. Does it have SFDP? Try adding PARSE_SFDP instead of the NO_SFDP_FLAGS. Please post an SFDP dump of this flash [1]. -michael [1] https://lore.kernel.org/linux-mtd/4304e19f3399a0a6e856119d01ccabe0@walle.cc/