Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1032586AbdIZWeE (ORCPT ); Tue, 26 Sep 2017 18:34:04 -0400 Received: from mail-it0-f53.google.com ([209.85.214.53]:45972 "EHLO mail-it0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031253AbdIZWeA (ORCPT ); Tue, 26 Sep 2017 18:34:00 -0400 X-Google-Smtp-Source: AOwi7QC7MFZ+ljcP8lVBOIyfPsNyhnazSC4Pr7XvM/EObbc4+gNWA9t71g8+p6VWFO5QEkkag/QCDNjgo4xcqbQCLfE= MIME-Version: 1.0 In-Reply-To: <1505355021.8308.4.camel@mhfsdcap03> References: <1505207272-16983-1-git-send-email-chaotian.jing@mediatek.com> <1505207272-16983-2-git-send-email-chaotian.jing@mediatek.com> <20170913141026.43oh4n4foipmahsk@rob-hp-laptop> <1505355021.8308.4.camel@mhfsdcap03> From: Ulf Hansson Date: Wed, 27 Sep 2017 00:33:59 +0200 Message-ID: Subject: Re: [PATCH 01/12] mmc: dt-bindings: update Mediatek MMC bindings To: Chaotian Jing Cc: Rob Herring , Mark Rutland , Matthias Brugger , Catalin Marinas , Will Deacon , yong mao , Linus Walleij , Javier Martinez Canillas , Heiner Kallweit , Phong LE , "linux-mmc@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , linux-mediatek@lists.infradead.org, "linux-kernel@vger.kernel.org" , srv_heupstream Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2359 Lines: 52 On 14 September 2017 at 04:10, Chaotian Jing wrote: > On Wed, 2017-09-13 at 09:10 -0500, Rob Herring wrote: >> On Tue, Sep 12, 2017 at 05:07:41PM +0800, Chaotian Jing wrote: >> > Change the comptiable for support of multi-platform >> > Add description for reg >> > Add description for source_cg >> > Add description for mediatek,latch-ck >> >> This is at least the 3rd patch with exactly the same vague subject. >> Please make the subject somewhat unique. >> > Thx, will change the subject at next version >> > >> > Signed-off-by: Chaotian Jing >> > --- >> > Documentation/devicetree/bindings/mmc/mtk-sd.txt | 13 ++++++++++--- >> > 1 file changed, 10 insertions(+), 3 deletions(-) >> > >> > diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt >> > index 4182ea3..405cd06 100644 >> > --- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt >> > +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt >> > @@ -7,10 +7,15 @@ This file documents differences between the core properties in mmc.txt >> > and the properties used by the msdc driver. >> > >> > Required properties: >> > -- compatible: Should be "mediatek,mt8173-mmc","mediatek,mt8135-mmc" >> > +- compatible: value should be either of the following. >> > + "mediatek,mt8135-mmc": for mmc host ip compatible with mt8135 >> > + "mediatek,mt8173-mmc": for mmc host ip compatible with mt8173 >> > + "mediatek,mt2701-mmc": for mmc host ip compatible with mt2701 >> > + "mediatek,mt2712-mmc": for mmc host ip compatible with mt2712 >> > +- reg: physical base address of the controller and length >> > - interrupts: Should contain MSDC interrupt number >> > -- clocks: MSDC source clock, HCLK >> > -- clock-names: "source", "hclk" >> > +- clocks: MSDC source clock, HCLK, source_cg >> > +- clock-names: "source", "hclk", "source_cg" >> >> All chips support source_cg? That's not backwards compatible for >> existing compatible strings if the driver requires it. > Not all chips support source_cg, for chips which do not support > source_cg, no need source_cg here, and the driver will parse it > to know if current chip support it. In such case you must not add add a required binding for it. I think that is what Rob is trying to point out for you. [...] Kind regards Uffe