Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755880AbaAIRf0 (ORCPT ); Thu, 9 Jan 2014 12:35:26 -0500 Received: from quartz.orcorp.ca ([184.70.90.242]:42095 "EHLO quartz.orcorp.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755235AbaAIRfS (ORCPT ); Thu, 9 Jan 2014 12:35:18 -0500 Date: Thu, 9 Jan 2014 10:35:05 -0700 From: Jason Gunthorpe To: boris brezillon Cc: devicetree@vger.kernel.org, Russell King , linux-doc@vger.kernel.org, dev@linux-sunxi.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, Rob Landley , Grant Likely , Maxime Ripard , David Woodhouse , linux-arm-kernel@lists.infradead.org Subject: Re: [RFC PATCH 3/9] of: mtd: add NAND timings retrieval support Message-ID: <20140109173505.GB8899@obsidianresearch.com> References: <1389190924-26226-1-git-send-email-b.brezillon@overkiz.com> <1389190924-26226-4-git-send-email-b.brezillon@overkiz.com> <20140108183418.GA12358@obsidianresearch.com> <52CDA032.3010804@overkiz.com> <20140108191339.GB12358@obsidianresearch.com> <52CE5F82.6070802@overkiz.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <52CE5F82.6070802@overkiz.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Broken-Reverse-DNS: no host name found for IP address 10.0.0.161 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 09, 2014 at 09:36:18AM +0100, boris brezillon wrote: > >You might want to check if you can boil down the DT timings from the > >huge list to just an ONFI mode number.. > > Sure, but the sunxi driver needs at least 19 of them... So does mvebu's NAND driver.. What I ment was you could have a onfi,nand-timing-mode = 0 in the DT. Each of the modes defines all ~19 parameters, higher modes are faster. Pick a mode value that fits all the parameters of the connected non-ONFI flash. This would be instead of defining each parameter individually.. Provide some helpers to convert from a onfi mode number to all the onfi defined timing parameters so that drivers can configure the HW.. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/