[PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Chunfeng Yun]

Add a property to tune usb2 phy's disconnect threshold.
And add a compatible for mt8196.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
index a9e3139fd421..2e012d5e1da1 100644
--- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
+++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
@@ -49,6 +49,7 @@ properties:
       - enum:
           - mediatek,mt3611-xsphy
           - mediatek,mt3612-xsphy
+          - mediatek,mt8196-xsphy
       - const: mediatek,xsphy
 
   reg:
@@ -129,6 +130,13 @@ patternProperties:
         minimum: 1
         maximum: 7
 
+      mediatek,discth:
+        description:
+          The selection of disconnect threshold (U2 phy)
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 1
+        maximum: 15
+
       mediatek,efuse-intr:
         description:
           The selection of Internal Resistor (U2/U3 phy)
-- 
2.46.0


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[PATCH 2/2] phy: mediatek: xsphy: add support to set disconnect threshold

[Chunfeng Yun]

Add a property to tune usb2 phy's disconnect threshold.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/phy/mediatek/phy-mtk-xsphy.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/mediatek/phy-mtk-xsphy.c b/drivers/phy/mediatek/phy-mtk-xsphy.c
index 7c248f5cfca5..718ed8f17c2d 100644
--- a/drivers/phy/mediatek/phy-mtk-xsphy.c
+++ b/drivers/phy/mediatek/phy-mtk-xsphy.c
@@ -59,6 +59,7 @@
 #define XSP_USBPHYACR6		((SSUSB_SIFSLV_U2PHY_COM) + 0x018)
 #define P2A6_RG_BC11_SW_EN	BIT(23)
 #define P2A6_RG_OTG_VBUSCMP_EN	BIT(20)
+#define PA6_RG_U2_DISCTH	GENMASK(7, 4)
 
 #define XSP_U2PHYDTM1		((SSUSB_SIFSLV_U2PHY_COM) + 0x06C)
 #define P2D_FORCE_IDDIG		BIT(9)
@@ -95,6 +96,7 @@ struct xsphy_instance {
 	int eye_src;
 	int eye_vrt;
 	int eye_term;
+	int discth;
 };
 
 struct mtk_xsphy {
@@ -244,9 +246,12 @@ static void phy_parse_property(struct mtk_xsphy *xsphy,
 					 &inst->eye_vrt);
 		device_property_read_u32(dev, "mediatek,eye-term",
 					 &inst->eye_term);
-		dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d\n",
+		device_property_read_u32(dev, "mediatek,discth",
+					 &inst->discth);
+		dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d, discth:%d\n",
 			inst->efuse_intr, inst->eye_src,
-			inst->eye_vrt, inst->eye_term);
+			inst->eye_vrt, inst->eye_term,
+			inst->discth);
 		break;
 	case PHY_TYPE_USB3:
 		device_property_read_u32(dev, "mediatek,efuse-intr",
@@ -285,6 +290,9 @@ static void u2_phy_props_set(struct mtk_xsphy *xsphy,
 	if (inst->eye_term)
 		mtk_phy_update_field(pbase + XSP_USBPHYACR1, P2A1_RG_TERM_SEL,
 				     inst->eye_term);
+	if (inst->discth)
+		mtk_phy_update_field(pbase + XSP_USBPHYACR6, PA6_RG_U2_DISCTH,
+				     inst->discth);
 }
 
 static void u3_phy_props_set(struct mtk_xsphy *xsphy,
-- 
2.46.0


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Re: [PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Krzysztof Kozlowski]

On Tue, Nov 26, 2024 at 10:58:58AM +0800, Chunfeng Yun wrote:
> Add a property to tune usb2 phy's disconnect threshold.
> And add a compatible for mt8196.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
>  Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> index a9e3139fd421..2e012d5e1da1 100644
> --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> @@ -49,6 +49,7 @@ properties:
>        - enum:
>            - mediatek,mt3611-xsphy
>            - mediatek,mt3612-xsphy
> +          - mediatek,mt8196-xsphy

Keep order.

>        - const: mediatek,xsphy
>  
>    reg:
> @@ -129,6 +130,13 @@ patternProperties:
>          minimum: 1
>          maximum: 7
>  
> +      mediatek,discth:
> +        description:
> +          The selection of disconnect threshold (U2 phy)

Threshold in what units?

Best regards,
Krzysztof


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Re: [PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[AngeloGioacchino Del Regno]

Il 26/11/24 03:58, Chunfeng Yun ha scritto:
> Add a property to tune usb2 phy's disconnect threshold.
> And add a compatible for mt8196.
> 

Is this a board-specific property? If so, can you please describe the reason?

Thanks,
Angelo

> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
>   Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> index a9e3139fd421..2e012d5e1da1 100644
> --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> @@ -49,6 +49,7 @@ properties:
>         - enum:
>             - mediatek,mt3611-xsphy
>             - mediatek,mt3612-xsphy
> +          - mediatek,mt8196-xsphy
>         - const: mediatek,xsphy
>   
>     reg:
> @@ -129,6 +130,13 @@ patternProperties:
>           minimum: 1
>           maximum: 7
>   
> +      mediatek,discth:
> +        description:
> +          The selection of disconnect threshold (U2 phy)
> +        $ref: /schemas/types.yaml#/definitions/uint32
> +        minimum: 1
> +        maximum: 15
> +
>         mediatek,efuse-intr:
>           description:
>             The selection of Internal Resistor (U2/U3 phy)




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Re: [PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Rob Herring]

On Tue, Nov 26, 2024 at 10:58:58AM +0800, Chunfeng Yun wrote:
> Add a property to tune usb2 phy's disconnect threshold.
> And add a compatible for mt8196.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
>  Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> index a9e3139fd421..2e012d5e1da1 100644
> --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> @@ -49,6 +49,7 @@ properties:
>        - enum:
>            - mediatek,mt3611-xsphy
>            - mediatek,mt3612-xsphy
> +          - mediatek,mt8196-xsphy
>        - const: mediatek,xsphy
>  
>    reg:
> @@ -129,6 +130,13 @@ patternProperties:
>          minimum: 1
>          maximum: 7
>  
> +      mediatek,discth:

That's not understandable. Spell it out: mediatek,disconnect-thres

> +        description:
> +          The selection of disconnect threshold (U2 phy)
> +        $ref: /schemas/types.yaml#/definitions/uint32
> +        minimum: 1
> +        maximum: 15
> +
>        mediatek,efuse-intr:
>          description:
>            The selection of Internal Resistor (U2/U3 phy)
> -- 
> 2.46.0
> 

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Re: [PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Chunfeng Yun (云春峰)]

hi,
On Wed, 2024-11-27 at 08:26 -0600, Rob Herring wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> On Tue, Nov 26, 2024 at 10:58:58AM +0800, Chunfeng Yun wrote:
> > Add a property to tune usb2 phy's disconnect threshold.
> > And add a compatible for mt8196.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> >  Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8
> > ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > index a9e3139fd421..2e012d5e1da1 100644
> > --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > @@ -49,6 +49,7 @@ properties:
> >        - enum:
> >            - mediatek,mt3611-xsphy
> >            - mediatek,mt3612-xsphy
> > +          - mediatek,mt8196-xsphy
> >        - const: mediatek,xsphy
> > 
> >    reg:
> > @@ -129,6 +130,13 @@ patternProperties:
> >          minimum: 1
> >          maximum: 7
> > 
> > +      mediatek,discth:
> 
> That's not understandable. Spell it out: mediatek,disconnect-thres
It comes from xsphy register map document, due to xsphy is similar with
t-phy, I port it from t-phy, and use the same property.


https://elixir.bootlin.com/linux/v6.13-rc3/source/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml#L226

Thanks.

> 
> > +        description:
> > +          The selection of disconnect threshold (U2 phy)
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        minimum: 1
> > +        maximum: 15
> > +
> >        mediatek,efuse-intr:
> >          description:
> >            The selection of Internal Resistor (U2/U3 phy)
> > --
> > 2.46.0
> > 
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Re: [PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Chunfeng Yun (云春峰)]

On Tue, 2024-11-26 at 09:51 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> Il 26/11/24 03:58, Chunfeng Yun ha scritto:
> > Add a property to tune usb2 phy's disconnect threshold.
> > And add a compatible for mt8196.
> > 
> 
> Is this a board-specific property? If so, can you please describe the
> reason?
No, it's a common property, all SoC with xsphy controller can use it.

Thanks

> 
> Thanks,
> Angelo
> 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> >   Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8
> > ++++++++
> >   1 file changed, 8 insertions(+)
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > index a9e3139fd421..2e012d5e1da1 100644
> > --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > @@ -49,6 +49,7 @@ properties:
> >         - enum:
> >             - mediatek,mt3611-xsphy
> >             - mediatek,mt3612-xsphy
> > +          - mediatek,mt8196-xsphy
> >         - const: mediatek,xsphy
> > 
> >     reg:
> > @@ -129,6 +130,13 @@ patternProperties:
> >           minimum: 1
> >           maximum: 7
> > 
> > +      mediatek,discth:
> > +        description:
> > +          The selection of disconnect threshold (U2 phy)
> > +        $ref: /schemas/types.yaml#/definitions/uint32
> > +        minimum: 1
> > +        maximum: 15
> > +
> >         mediatek,efuse-intr:
> >           description:
> >             The selection of Internal Resistor (U2/U3 phy)
> 
> 
> 
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Re: [PATCH 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Chunfeng Yun (云春峰)]

On Tue, 2024-11-26 at 08:38 +0100, Krzysztof Kozlowski wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> On Tue, Nov 26, 2024 at 10:58:58AM +0800, Chunfeng Yun wrote:
> > Add a property to tune usb2 phy's disconnect threshold.
> > And add a compatible for mt8196.
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> > ---
> >  Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8
> > ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > index a9e3139fd421..2e012d5e1da1 100644
> > --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> > @@ -49,6 +49,7 @@ properties:
> >        - enum:
> >            - mediatek,mt3611-xsphy
> >            - mediatek,mt3612-xsphy
> > +          - mediatek,mt8196-xsphy
> 
> Keep order.
Yes, it's already ordered.
> 
> >        - const: mediatek,xsphy
> > 
> >    reg:
> > @@ -129,6 +130,13 @@ patternProperties:
> >          minimum: 1
> >          maximum: 7
> > 
> > +      mediatek,discth:
> > +        description:
> > +          The selection of disconnect threshold (U2 phy)
> 
> Threshold in what units?
It's a threshold level, can be treat it as an index.

Thanks

> 
> Best regards,
> Krzysztof
> 
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