Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752347AbdI2Lwu (ORCPT ); Fri, 29 Sep 2017 07:52:50 -0400 Received: from mailgw02.mediatek.com ([218.249.47.111]:34800 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752100AbdI2Lus (ORCPT ); Fri, 29 Sep 2017 07:50:48 -0400 X-UUID: 38116d284a5741eb899ec3bd564105af-20170929 Message-ID: <1506685837.5896.5.camel@mhfsdcap03> Subject: Re: [PATCH v3] mmc: dt-bindings: Add reg/source_cg/latch-ck for Mediatek MMC bindings From: Chaotian Jing To: Matthias Brugger CC: Rob Herring , Ulf Hansson , Mark Rutland , Catalin Marinas , Will Deacon , yong mao , Linus Walleij , "Javier Martinez Canillas" , Heiner Kallweit , Phong LE , , , , , , Date: Fri, 29 Sep 2017 19:50:37 +0800 In-Reply-To: References: <1506081829-29296-1-git-send-email-chaotian.jing@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3166 Lines: 69 On Fri, 2017-09-29 at 13:11 +0200, Matthias Brugger wrote: > > On 09/22/2017 02:03 PM, 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 > > Note that source_cg and mediatek,latch-ck are optional for some projects, > > eg, MT2701 do not have source_cg, and MT2712 do not need > > mediatek,latch-ck > > > > 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..b934a29 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 > > NAK, this has to be: > You have to add the fallback compatible ("mediatek,mt8135-mmc") to the binding > description as otherwise the driver does not get probed. > > Regards, > Matthias Thanks for your comments, will add the fallback compatible ("mediatek,mt8135-mmc") to the binding in this patch. but, is possible to remove the fallback compatible at next patch ? eg, following patches will modify the driver like below: static const struct of_device_id msdc_of_ids[] = { { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat}, { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat}, }; then, there is no probe issue and remove the fallback compatible. Thx! > > > +- 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" > > - pinctrl-names: should be "default", "state_uhs" > > - pinctrl-0: should contain default/high speed pin ctrl > > - pinctrl-1: should contain uhs mode pin ctrl > > @@ -30,6 +35,8 @@ Optional properties: > > - mediatek,hs400-cmd-resp-sel-rising: HS400 command response sample selection > > If present,HS400 command responses are sampled on rising edges. > > If not present,HS400 command responses are sampled on falling edges. > > +- mediatek,latch-ck: Some SoCs do not support enhance_rx, need set correct latch-ck to avoid data crc > > + error caused by stop clock(fifo full) > > > > Examples: > > mmc0: mmc@11230000 { > >