| Message ID | 20230626092952.1115834-2-xu.yang_2@nxp.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [1/3] usb: chipidea: imx: improve logic if samsung,picophy-* parameter is 0 | expand |
On 26/06/2023 11:29, Xu Yang wrote: > The samsung,picophy-rise-fall-time-adjust property can help to adjust the > rise/fall times of the high-speed transmitter waveform. The value can be > 0~3. > > Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > --- > .../devicetree/bindings/usb/ci-hdrc-usb2.yaml | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > index 782402800d4a..d84c66c342ac 100644 > --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > @@ -292,6 +292,16 @@ properties: > minimum: 0x0 > maximum: 0xf > > + samsung,picophy-rise-fall-time-adjust: > + description: > + HS Transmitter Rise/Fall Time Adjustment. Adjust the rise/fall times Adjust with/by what? What are the units? > + of the high-speed transmitter waveform. The range is from 0x0 to 0x3, > + the default value is 0x1. Details can refer to TXRISETUNE0 bit of default: 1 Don't repeat constraints in free form text. > + USBNC_n_PHY_CFG1. > + $ref: /schemas/types.yaml#/definitions/uint32 > + minimum: 0x0 > + maximum: 0x3 Why "samsung" prefix? If this is specific to samsung, make it specific/narrowed like other properties. There are no Samsung compatibles here, so what is exactly here made by Samsung? Which device? Best regards, Krzysztof
Hi Krzysztof, > -----Original Message----- > From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > Sent: Monday, June 26, 2023 11:45 PM > To: Xu Yang <xu.yang_2@nxp.com>; peter.chen@kernel.org; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; > gregkh@linuxfoundation.org > Cc: conor+dt@kernel.org; shawnguo@kernel.org; s.hauer@pengutronix.de; dl-linux-imx <linux-imx@nxp.com>; Peng Fan > <peng.fan@nxp.com>; linux-usb@vger.kernel.org; devicetree@vger.kernel.org; Jun Li <jun.li@nxp.com> > Subject: [EXT] Re: [PATCH 2/3] dt-bindings: usb: ci-hdrc-usb2: add samsung,picophy-rise-fall-time-adjust property > > Caution: This is an external email. Please take care when clicking links or opening attachments. When in doubt, report the > message using the 'Report this email' button > > > On 26/06/2023 11:29, Xu Yang wrote: > > The samsung,picophy-rise-fall-time-adjust property can help to adjust the > > rise/fall times of the high-speed transmitter waveform. The value can be > > 0~3. > > > > Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > > --- > > .../devicetree/bindings/usb/ci-hdrc-usb2.yaml | 10 ++++++++++ > > 1 file changed, 10 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci- > hdrc-usb2.yaml > > index 782402800d4a..d84c66c342ac 100644 > > --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > > +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > > @@ -292,6 +292,16 @@ properties: > > minimum: 0x0 > > maximum: 0xf > > > > + samsung,picophy-rise-fall-time-adjust: > > + description: > > + HS Transmitter Rise/Fall Time Adjustment. Adjust the rise/fall times > > Adjust with/by what? What are the units? This property is used to adjust the rise/fall time of the high-speed transmitter waveform. It has no unit. According to the description of USBNC_n_PHY_CFG1 register, the rise/fall time will be increased or decreased by a certain percentage relative to design default time if a value is given to this property. The actions as below: - 0: -10% - 1: design default - 2: +15% - 3: +20% > > > + of the high-speed transmitter waveform. The range is from 0x0 to 0x3, > > + the default value is 0x1. Details can refer to TXRISETUNE0 bit of > > default: 1 > > Don't repeat constraints in free form text. Okay, will remove. > > > + USBNC_n_PHY_CFG1. > > + $ref: /schemas/types.yaml#/definitions/uint32 > > + minimum: 0x0 > > + maximum: 0x3 > > Why "samsung" prefix? If this is specific to samsung, make it > specific/narrowed like other properties. > > There are no Samsung compatibles here, so what is exactly here made by > Samsung? Which device? Reviewed the design, this is not specific to samsung. I will rename it to fsl,picophy-rise-fall-time-adjust since it's related to imx chip. Thanks, Xu Yang > > Best regards, > Krzysztof
On 27/06/2023 05:10, Xu Yang wrote: > Hi Krzysztof, > >> -----Original Message----- >> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> >> Sent: Monday, June 26, 2023 11:45 PM >> To: Xu Yang <xu.yang_2@nxp.com>; peter.chen@kernel.org; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; >> gregkh@linuxfoundation.org >> Cc: conor+dt@kernel.org; shawnguo@kernel.org; s.hauer@pengutronix.de; dl-linux-imx <linux-imx@nxp.com>; Peng Fan >> <peng.fan@nxp.com>; linux-usb@vger.kernel.org; devicetree@vger.kernel.org; Jun Li <jun.li@nxp.com> >> Subject: [EXT] Re: [PATCH 2/3] dt-bindings: usb: ci-hdrc-usb2: add samsung,picophy-rise-fall-time-adjust property >> >> Caution: This is an external email. Please take care when clicking links or opening attachments. When in doubt, report the >> message using the 'Report this email' button >> >> >> On 26/06/2023 11:29, Xu Yang wrote: >>> The samsung,picophy-rise-fall-time-adjust property can help to adjust the >>> rise/fall times of the high-speed transmitter waveform. The value can be >>> 0~3. >>> >>> Signed-off-by: Xu Yang <xu.yang_2@nxp.com> >>> --- >>> .../devicetree/bindings/usb/ci-hdrc-usb2.yaml | 10 ++++++++++ >>> 1 file changed, 10 insertions(+) >>> >>> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci- >> hdrc-usb2.yaml >>> index 782402800d4a..d84c66c342ac 100644 >>> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml >>> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml >>> @@ -292,6 +292,16 @@ properties: >>> minimum: 0x0 >>> maximum: 0xf >>> >>> + samsung,picophy-rise-fall-time-adjust: >>> + description: >>> + HS Transmitter Rise/Fall Time Adjustment. Adjust the rise/fall times >> >> Adjust with/by what? What are the units? > > This property is used to adjust the rise/fall time of the high-speed > transmitter waveform. It has no unit. According to the description of > USBNC_n_PHY_CFG1 register, the rise/fall time will be increased or > decreased by a certain percentage relative to design default time if > a value is given to this property. > > The actions as below: > - 0: -10% > - 1: design default > - 2: +15% > - 3: +20% Include it then in the description or even make the property -percent: https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/property-units.yaml Best regards, Krzysztof
> -----Original Message----- > From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > Sent: Tuesday, June 27, 2023 2:24 PM > To: Xu Yang <xu.yang_2@nxp.com>; peter.chen@kernel.org; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; > gregkh@linuxfoundation.org > Cc: conor+dt@kernel.org; shawnguo@kernel.org; s.hauer@pengutronix.de; dl-linux-imx <linux-imx@nxp.com>; Peng Fan > <peng.fan@nxp.com>; linux-usb@vger.kernel.org; devicetree@vger.kernel.org; Jun Li <jun.li@nxp.com> > Subject: Re: [EXT] Re: [PATCH 2/3] dt-bindings: usb: ci-hdrc-usb2: add samsung,picophy-rise-fall-time-adjust property > > Caution: This is an external email. Please take care when clicking links or opening attachments. When in doubt, report the > message using the 'Report this email' button > > > On 27/06/2023 05:10, Xu Yang wrote: > > Hi Krzysztof, > > > >> -----Original Message----- > >> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > >> Sent: Monday, June 26, 2023 11:45 PM > >> To: Xu Yang <xu.yang_2@nxp.com>; peter.chen@kernel.org; robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; > >> gregkh@linuxfoundation.org > >> Cc: conor+dt@kernel.org; shawnguo@kernel.org; s.hauer@pengutronix.de; dl-linux-imx <linux-imx@nxp.com>; Peng > Fan > >> <peng.fan@nxp.com>; linux-usb@vger.kernel.org; devicetree@vger.kernel.org; Jun Li <jun.li@nxp.com> > >> Subject: [EXT] Re: [PATCH 2/3] dt-bindings: usb: ci-hdrc-usb2: add samsung,picophy-rise-fall-time-adjust property > >> > >> Caution: This is an external email. Please take care when clicking links or opening attachments. When in doubt, report > the > >> message using the 'Report this email' button > >> > >> > >> On 26/06/2023 11:29, Xu Yang wrote: > >>> The samsung,picophy-rise-fall-time-adjust property can help to adjust the > >>> rise/fall times of the high-speed transmitter waveform. The value can be > >>> 0~3. > >>> > >>> Signed-off-by: Xu Yang <xu.yang_2@nxp.com> > >>> --- > >>> .../devicetree/bindings/usb/ci-hdrc-usb2.yaml | 10 ++++++++++ > >>> 1 file changed, 10 insertions(+) > >>> > >>> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci- > >> hdrc-usb2.yaml > >>> index 782402800d4a..d84c66c342ac 100644 > >>> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > >>> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml > >>> @@ -292,6 +292,16 @@ properties: > >>> minimum: 0x0 > >>> maximum: 0xf > >>> > >>> + samsung,picophy-rise-fall-time-adjust: > >>> + description: > >>> + HS Transmitter Rise/Fall Time Adjustment. Adjust the rise/fall times > >> > >> Adjust with/by what? What are the units? > > > > This property is used to adjust the rise/fall time of the high-speed > > transmitter waveform. It has no unit. According to the description of > > USBNC_n_PHY_CFG1 register, the rise/fall time will be increased or > > decreased by a certain percentage relative to design default time if > > a value is given to this property. > > > > The actions as below: > > - 0: -10% > > - 1: design default > > - 2: +15% > > - 3: +20% > > Include it then in the description or even make the property -percent: Okay, will add this in v2. Thanks, Xu Yang > https://github.com/devicetree-org/dt- > schema%2Fblob%2Fmain%2Fdtschema%2Fschemas%2Fproperty- > units.yaml&data=05%7C01%7Cxu.yang_2%40nxp.com%7C9ba7b99a7b6849ec138e08db76d71211%7C686ea1d3bc2b4c6fa92 > cd99c5c301635%7C0%7C0%7C638234438320292819%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2lu > MzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=j3mETXe6ZMmeDxFbZ3N1hQaIb4wSt3IrIIbxm8f%2F > S1g%3D&reserved=0 > > > Best regards, > Krzysztof
diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml index 782402800d4a..d84c66c342ac 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.yaml @@ -292,6 +292,16 @@ properties: minimum: 0x0 maximum: 0xf + samsung,picophy-rise-fall-time-adjust: + description: + HS Transmitter Rise/Fall Time Adjustment. Adjust the rise/fall times + of the high-speed transmitter waveform. The range is from 0x0 to 0x3, + the default value is 0x1. Details can refer to TXRISETUNE0 bit of + USBNC_n_PHY_CFG1. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0x0 + maximum: 0x3 + usb-phy: description: phandle for the PHY device. Use "phys" instead. $ref: /schemas/types.yaml#/definitions/phandle
The samsung,picophy-rise-fall-time-adjust property can help to adjust the rise/fall times of the high-speed transmitter waveform. The value can be 0~3. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> --- .../devicetree/bindings/usb/ci-hdrc-usb2.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+)