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[209.132.180.67]) by mx.google.com with ESMTP id cl11si18225082plb.170.2019.02.21.05.13.28; Thu, 21 Feb 2019 05:13:44 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=EmGf34C9; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727887AbfBUNL0 (ORCPT + 99 others); Thu, 21 Feb 2019 08:11:26 -0500 Received: from fllv0015.ext.ti.com ([198.47.19.141]:39776 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725385AbfBUNL0 (ORCPT ); Thu, 21 Feb 2019 08:11:26 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x1LDAOij121403; Thu, 21 Feb 2019 07:10:24 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1550754624; bh=hugBsHCAGaJB7Qsx+c9P3n+DXVu2tvNWYRAeH/J9ITM=; h=Subject:To:CC:References:From:Date:In-Reply-To; b=EmGf34C9U7doGwkP8RYrfPTTsN+yyNUsgeHSg7eRqQ5wuE69NfsFHWmNoVxNd/3Cg zhXf4Yf/YzHEOgrVQgBsU9dimDP96Y5TqpmqsZPbsw8NK7XD4ECVF7BOYH3Rh7zBem FoinaDhU+hP64BAqeEHDyzkYDLoM9plcGdvd2x04= Received: from DLEE104.ent.ti.com (dlee104.ent.ti.com [157.170.170.34]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x1LDAOBo025156 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 21 Feb 2019 07:10:24 -0600 Received: from DLEE110.ent.ti.com (157.170.170.21) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Thu, 21 Feb 2019 07:10:24 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE110.ent.ti.com (157.170.170.21) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Thu, 21 Feb 2019 07:10:24 -0600 Received: from [172.24.190.89] (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id x1LDALhE026078; Thu, 21 Feb 2019 07:10:21 -0600 Subject: Re: [EXT] [PATCH v6 2/2] mtd: spi-nor: cadence-quadspi: Add support for Octal SPI controller To: "Bean Huo (beanhuo)" , Boris Brezillon , "Tudor.Ambarus@microchip.com" CC: "devicetree@vger.kernel.org" , Rob Herring , "linux-mtd@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Marek Vasut References: <20190212083809.6534-1-vigneshr@ti.com> <20190212083809.6534-3-vigneshr@ti.com> From: Vignesh R Message-ID: Date: Thu, 21 Feb 2019 18:41:21 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 21/02/19 4:11 PM, Bean Huo (beanhuo) wrote: > Hi, Vignesh > >> >> Cadence OSPI controller IP supports Octal IO (x8 IO lines), It also has an >> integrated PHY. IP register layout is very similar to existing QSPI IP except for >> additional bits to support Octal and Octal DDR mode. Therefore, extend >> current driver to support Octal mode. Only Octal SDR read (1-1-8)mode is >> supported for now. > > Does this your Cadence OSPI controller support 8-8-8 IO mode, if yes, > Why not directly enable 8-8-8 mode? > Yes.. IP also supports 8-8-8 DTR mode. But supporting those modes require enabling, configuring and calibrating OSPI PHY module within the IP. I am planning to do that, after moving driver over to spi-mem layer. >> Tested with mt35xu512aba Octal flash on TI's AM654 EVM. >> >> Signed-off-by: Vignesh R >> ______________________________________________________ >> Linux MTD discussion mailing list >> http://lists.infradead.org/mailman/listinfo/linux-mtd/ > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/ > -- Regards Vignesh