From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1954181AbdDYU0q (ORCPT ); Tue, 25 Apr 2017 16:26:46 -0400 Received: from mail-wm0-f68.google.com ([74.125.82.68]:33849 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1949636AbdDYU0Q (ORCPT ); Tue, 25 Apr 2017 16:26:16 -0400 Subject: Re: [PATCH v8 3/4] mtd: spi-nor: introduce Double Transfer Rate (DTR) SPI protocols To: Cyrille Pitchen , linux-mtd@lists.infradead.org References: <44562d5d511d8fef8c21ea7e10f32cf727b147b8.1493149757.git.cyrille.pitchen@wedev4u.fr> Cc: computersforpeace@gmail.com, dwmw2@infradead.org, boris.brezillon@free-electrons.com, richard@nod.at, linux-kernel@vger.kernel.org, Cyrille Pitchen From: Marek Vasut Message-ID: Date: Tue, 25 Apr 2017 22:26:06 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: <44562d5d511d8fef8c21ea7e10f32cf727b147b8.1493149757.git.cyrille.pitchen@wedev4u.fr> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/25/2017 10:08 PM, Cyrille Pitchen wrote: > From: Cyrille Pitchen > > This patch introduces support to Double Transfer Rate (DTR) SPI protocols. > DTR is used only for Fast Read operations. > > According to manufacturer datasheets, whatever the number of I/O lines > used during instruction (x) and address/mode/dummy (y) clock cycles, DTR > is used only during data (z) clock cycles of SPI x-y-z protocols. > > Signed-off-by: Cyrille Pitchen Reviewed-by: Marek Vasut -- Best regards, Marek Vasut