From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36D80C432C3 for ; Wed, 20 Nov 2019 16:38:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EEACE2068E for ; Wed, 20 Nov 2019 16:38:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=akkea.ca header.i=@akkea.ca header.b="lj/jZgQO"; dkim=pass (1024-bit key) header.d=akkea.ca header.i=@akkea.ca header.b="tqbElT9Z" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729239AbfKTQiu (ORCPT ); Wed, 20 Nov 2019 11:38:50 -0500 Received: from node.akkea.ca ([192.155.83.177]:58348 "EHLO node.akkea.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728632AbfKTQiu (ORCPT ); Wed, 20 Nov 2019 11:38:50 -0500 Received: from localhost (localhost [127.0.0.1]) by node.akkea.ca (Postfix) with ESMTP id 03FA34E2006; Wed, 20 Nov 2019 16:38:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=akkea.ca; s=mail; t=1574267929; bh=yczOZvIA0pLja/5G0e638pMmagqLwd3PNzd2MZu2vOU=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=lj/jZgQOfWzo9rVMjutg1sXICkp8Vk+49zefmARb4JwXgRKj9s5c6+gchibOiHVPG hDUmJj7Dr0KagVFA3OWk5o6jj3NEqqumnSzXnkGzPwjYpudUCZOvf7BlwDkwX7X7ld GHbVRZYi+SPyduIMwtZG8YVI/XdIdE3vVLZHtwMI= X-Virus-Scanned: Debian amavisd-new at mail.akkea.ca Received: from node.akkea.ca ([127.0.0.1]) by localhost (mail.akkea.ca [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Iv-fRhyZHsij; Wed, 20 Nov 2019 16:38:48 +0000 (UTC) Received: from www.akkea.ca (node.akkea.ca [192.155.83.177]) by node.akkea.ca (Postfix) with ESMTPSA id E6FDA4E2003; Wed, 20 Nov 2019 16:38:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=akkea.ca; s=mail; t=1574267928; bh=yczOZvIA0pLja/5G0e638pMmagqLwd3PNzd2MZu2vOU=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=tqbElT9ZO2tAyJD7l5bEkeiJteKz2XWL4JyNFyLBz88DyiD0eVQXerb8ql0O48ffK xgojrMoXhpEhRz/OHGmIuaytixs1dmK3j24oeZC3DJ+klFXGUfbAicDEHn49eVfL4O 21kp12ypXZVGw+Aso2Y3V/SWfFPZb5lTz41hGhcs= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 20 Nov 2019 08:38:47 -0800 From: Angus Ainslie To: Leonard Crestez Cc: Jacky Bai , Marco Felsch , Georgi Djakov , Rob Herring , Chanwoo Choi , =?UTF-8?Q?Artur_=C5=9Awigo=C5=84?= , Alexandre Bailon , "Rafael J. Wysocki" , Anson Huang , Abel Vesa , Krzysztof Kozlowski , MyungJoo Ham , Kyungmin Park , Saravana Kannan , Mark Rutland , Viresh Kumar , Shawn Guo , Aisheng Dong , Fabio Estevam , Stephen Boyd , Michael Turquette , Matthias Kaehlcke , Martin Kepplinger , Silvano Di Ninno , linux-pm@vger.kernel.org, kernel@pengutronix.de, dl-linux-imx , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm-owner@vger.kernel.org Subject: Re: [PATCH RFC v6 2/9] PM / devfreq: Add generic imx bus scaling driver In-Reply-To: References: <008f2fa973b23fc716d678c5bd35af54@akkea.ca> Message-ID: X-Sender: angus@akkea.ca User-Agent: Roundcube Webmail/1.3.6 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 2019-11-20 08:30, Leonard Crestez wrote: > On 20.11.2019 17:41, Angus Ainslie wrote: >> Hi Leonard, >> >> On 2019-11-20 07:04, Leonard Crestez wrote: >>> On 20.11.2019 16:08, Angus Ainslie wrote: >>> Is "mainline ATF" an important criteria for Purism? >> >> Yes we intend to bring all of our patches to mainline and were hoping >> that NXP would be doing the same. Shouldn't a mainline kernel run on a >> mainline ATF ? > > You can still use mainline ATF (tested right now) but the imx8m-ddrc > driver won't probe. > Sorry I was talking about the DDR frequency scaling specifically. > The ability to mix and match different branches of firmware and kernel > is very useful for testing. There might be slight incompatibilities but > in theory if a feature depends on both firmware and kernel support then > it should gracefully degrade rather than crash or hang. I saw the check you put in for the correct ATF version and that's very helpful thanks. > > ATF support for this feature will be mainlined eventually, I picked the > linux side first because review is more challenging and changes are > much > larger relative to what we have in our internal tree. > Do you have a patch against mainline ATF that we can test this feature with ? Thanks Angus > -- > Regards, > Leonard