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

Message ID 1507689696-25928-2-git-send-email-chaotian.jing@mediatek.com
State Changes Requested
Headers show
Series
  • mmc: mediatek: add support of mt2701/mt2712
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Commit Message

Chaotian Jing Oct. 11, 2017, 2:41 a.m.
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@mediatek.com>
---
 Documentation/devicetree/bindings/mmc/mtk-sd.txt | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

Comments

Rob Herring Oct. 13, 2017, 9:50 p.m. | #1
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@mediatek.com>
> ---
>  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.

Rob
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Chaotian Jing Oct. 14, 2017, 2:12 a.m. | #2
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@mediatek.com>
> > ---
> >  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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Patch

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)
 
 Examples:
 mmc0: mmc@11230000 {