Re: [PATCH v5 01/12] mmc: dt-bindings: Add reg/source_cg/latch-ck for Mediatek MMC bindings

Chaotian Jing
2017-10-14T02:12:46Z

On Fri, 2017-10-13 at 16:50 -0500, Rob Herring wrote:
> On Wed, Oct 11, 2017 at 10:41:25AM +0800, Chaotian Jing wrote:
> > Change the comptiable for support of multi-platform
> > Make compatible explicit
> > 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 <chaotian.jing-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
> > ---
> > Documentation/devicetree/bindings/mmc/mtk-sd.txt | 16 +++++++++++++---
> > 1 file changed, 13 insertions(+), 3 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
> > index 4182ea3..2bb585b 100644
> > --- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt
> > +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
> > @@ -7,10 +7,18 @@ 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: Should contain phandle for the clock feeding the MMC controller
> > +- clock-names: Should contain the following:
> > + "source" - source clock (required)
> > + "hclk" - HCLK which used for host (required)
> > + "source_cg" - independent source clock gate (required for MT2712)
> > - 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 +38,8 @@ 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)
>
> What values are supported? What's the default if not present.
>
> Be clear what compatible strings this property applies to or doesn't
> apply to.
OK, will make it more clearly at next version.
Thx!
>
> Rob

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