From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933649AbdA0R13 (ORCPT ); Fri, 27 Jan 2017 12:27:29 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:60146 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933148AbdA0R0q (ORCPT ); Fri, 27 Jan 2017 12:26:46 -0500 From: Gregory CLEMENT To: Ulf Hansson Cc: Adrian Hunter , "linux-mmc\@vger.kernel.org" , Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , Thomas Petazzoni , "linux-arm-kernel\@lists.infradead.org" , Mike Turquette , Stephen Boyd , linux-clk , "linux-kernel\@vger.kernel.org" , Rob Herring , "devicetree\@vger.kernel.org" , Ziji Hu , Jimmy Xu , Jisheng Zhang , Nadav Haklai , Ryan Gao , Doug Jones , Victor Gu , "Wei\(SOCP\) Liu" , Wilson Ding , Yehuda Yitschak , Ma rcin Wojtas , Hanna Hawa , Kostya Porotchkin Subject: Re: [PATCH v5 05/12] dt: bindings: Add bindings for Marvell Xenon SD Host Controller References: <89c95d0084da6ad7132caa54ca66eb619d8a5090.1484154449.git-series.gregory.clement@free-electrons.com> <87fuk4yg1i.fsf@free-electrons.com> Date: Fri, 27 Jan 2017 18:25:56 +0100 In-Reply-To: (Ulf Hansson's message of "Fri, 27 Jan 2017 16:36:36 +0100") Message-ID: <87bmuswh23.fsf@free-electrons.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ulf, On ven., janv. 27 2017, Ulf Hansson wrote: >> >> But I am curious to know why do you think we could use it without any >> need. Are you aware of some abuse of this property? > > Yes. > Actually I was hopping that you point some examples :) But as you point mmc-ddr-3_3v I found my answers here: http://www.spinics.net/lists/linux-mmc/msg38602.html >> >>> >>> Perhaps you can elaborate exactly why it makes sense for your case. Or >>> perhaps we already discussed this, in either case, please re-fresh my >>> mind. >> >> For instance we need it now on the 7040DB board which does not have the >> 1.8V signal voltage available. > > It it's better to describe what the controller/board support, instead > of what it doesn't. > > I think you should be able to use other existing mmc DT bindings > (perhaps also you need the brand new "mmc-ddr-3_3v"), instead of the > "no-1-8-v". OK I will try with this one. And if it works, I wonder if it worth mentioning it as it is also part of the mmc binding. Gregory > > Kind regards > Uffe -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gregory CLEMENT Subject: Re: [PATCH v5 05/12] dt: bindings: Add bindings for Marvell Xenon SD Host Controller Date: Fri, 27 Jan 2017 18:25:56 +0100 Message-ID: <87bmuswh23.fsf@free-electrons.com> References: <89c95d0084da6ad7132caa54ca66eb619d8a5090.1484154449.git-series.gregory.clement@free-electrons.com> <87fuk4yg1i.fsf@free-electrons.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: (Ulf Hansson's message of "Fri, 27 Jan 2017 16:36:36 +0100") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Ulf Hansson Cc: Jimmy Xu , Andrew Lunn , "linux-mmc@vger.kernel.org" , Mike Turquette , "linux-kernel@vger.kernel.org" , Nadav Haklai , Ziji Hu , Victor Gu , Doug Jones , linux-clk , Jisheng Zhang , Yehuda Yitschak , Ma rcin Wojtas , Kostya Porotchkin , Hanna Hawa , Sebastian Hesselbarth , "devicetree@vger.kernel.org" , Jason Cooper , Rob Herring , Ryan Gao , "Wei(SOCP) Liu" , "linux-arm-kernel@lists.infradead.org" List-Id: devicetree@vger.kernel.org Hi Ulf, On ven., janv. 27 2017, Ulf Hansson wrote: >> >> But I am curious to know why do you think we could use it without any >> need. Are you aware of some abuse of this property? > > Yes. > Actually I was hopping that you point some examples :) But as you point mmc-ddr-3_3v I found my answers here: http://www.spinics.net/lists/linux-mmc/msg38602.html >> >>> >>> Perhaps you can elaborate exactly why it makes sense for your case. Or >>> perhaps we already discussed this, in either case, please re-fresh my >>> mind. >> >> For instance we need it now on the 7040DB board which does not have the >> 1.8V signal voltage available. > > It it's better to describe what the controller/board support, instead > of what it doesn't. > > I think you should be able to use other existing mmc DT bindings > (perhaps also you need the brand new "mmc-ddr-3_3v"), instead of the > "no-1-8-v". OK I will try with this one. And if it works, I wonder if it worth mentioning it as it is also part of the mmc binding. Gregory > > Kind regards > Uffe -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Gregory CLEMENT To: Ulf Hansson Cc: Adrian Hunter , "linux-mmc\@vger.kernel.org" , Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , Thomas Petazzoni , "linux-arm-kernel\@lists.infradead.org" , Mike Turquette , Stephen Boyd , linux-clk , "linux-kernel\@vger.kernel.org" , Rob Herring , "devicetree\@vger.kernel.org" , Ziji Hu , Jimmy Xu , Jisheng Zhang , Nadav Haklai , Ryan Gao , Doug Jones , Victor Gu , "Wei\(SOCP\) Liu" , Wilson Ding , Yehuda Yitschak , Ma rcin Wojtas , Hanna Hawa , Kostya Porotchkin Subject: Re: [PATCH v5 05/12] dt: bindings: Add bindings for Marvell Xenon SD Host Controller References: <89c95d0084da6ad7132caa54ca66eb619d8a5090.1484154449.git-series.gregory.clement@free-electrons.com> <87fuk4yg1i.fsf@free-electrons.com> Date: Fri, 27 Jan 2017 18:25:56 +0100 In-Reply-To: (Ulf Hansson's message of "Fri, 27 Jan 2017 16:36:36 +0100") Message-ID: <87bmuswh23.fsf@free-electrons.com> MIME-Version: 1.0 Content-Type: text/plain List-ID: Hi Ulf, On ven., janv. 27 2017, Ulf Hansson wrote: >> >> But I am curious to know why do you think we could use it without any >> need. Are you aware of some abuse of this property? > > Yes. > Actually I was hopping that you point some examples :) But as you point mmc-ddr-3_3v I found my answers here: http://www.spinics.net/lists/linux-mmc/msg38602.html >> >>> >>> Perhaps you can elaborate exactly why it makes sense for your case. Or >>> perhaps we already discussed this, in either case, please re-fresh my >>> mind. >> >> For instance we need it now on the 7040DB board which does not have the >> 1.8V signal voltage available. > > It it's better to describe what the controller/board support, instead > of what it doesn't. > > I think you should be able to use other existing mmc DT bindings > (perhaps also you need the brand new "mmc-ddr-3_3v"), instead of the > "no-1-8-v". OK I will try with this one. And if it works, I wonder if it worth mentioning it as it is also part of the mmc binding. Gregory > > Kind regards > Uffe -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregory.clement@free-electrons.com (Gregory CLEMENT) Date: Fri, 27 Jan 2017 18:25:56 +0100 Subject: [PATCH v5 05/12] dt: bindings: Add bindings for Marvell Xenon SD Host Controller In-Reply-To: (Ulf Hansson's message of "Fri, 27 Jan 2017 16:36:36 +0100") References: <89c95d0084da6ad7132caa54ca66eb619d8a5090.1484154449.git-series.gregory.clement@free-electrons.com> <87fuk4yg1i.fsf@free-electrons.com> Message-ID: <87bmuswh23.fsf@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Ulf, On ven., janv. 27 2017, Ulf Hansson wrote: >> >> But I am curious to know why do you think we could use it without any >> need. Are you aware of some abuse of this property? > > Yes. > Actually I was hopping that you point some examples :) But as you point mmc-ddr-3_3v I found my answers here: http://www.spinics.net/lists/linux-mmc/msg38602.html >> >>> >>> Perhaps you can elaborate exactly why it makes sense for your case. Or >>> perhaps we already discussed this, in either case, please re-fresh my >>> mind. >> >> For instance we need it now on the 7040DB board which does not have the >> 1.8V signal voltage available. > > It it's better to describe what the controller/board support, instead > of what it doesn't. > > I think you should be able to use other existing mmc DT bindings > (perhaps also you need the brand new "mmc-ddr-3_3v"), instead of the > "no-1-8-v". OK I will try with this one. And if it works, I wonder if it worth mentioning it as it is also part of the mmc binding. Gregory > > Kind regards > Uffe -- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com