| Message ID | 20201115185210.573739-2-martin.blumenstingl@googlemail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [RFC,v2,1/5] dt-bindings: net: dwmac-meson: use picoseconds for the RGMII RX delay | expand |
On 11/15/20 10:52 AM, Martin Blumenstingl wrote: > Amlogic Meson G12A, G12B and SM1 SoCs have a more advanced RGMII RX > delay register which allows picoseconds precision. Deprecate the old > "amlogic,rx-delay-ns" in favour of a new "amlogic,rgmii-rx-delay-ps" > property. > > For older SoCs the only known supported values were 0ns and 2ns. The new > SoCs have 200ps precision and support RGMII RX delays between 0ps and > 3000ps. > > While here, also update the description of the RX delay to indicate > that: > - with "rgmii" or "rgmii-id" the RX delay should be specified > - with "rgmii-id" or "rgmii-rxid" the RX delay is added by the PHY so > any configuration on the MAC side is ignored > - with "rmii" the RX delay is not applicable and any configuration is > ignored > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
On Sun, Nov 15, 2020 at 07:52:06PM +0100, Martin Blumenstingl wrote: > Amlogic Meson G12A, G12B and SM1 SoCs have a more advanced RGMII RX > delay register which allows picoseconds precision. Deprecate the old > "amlogic,rx-delay-ns" in favour of a new "amlogic,rgmii-rx-delay-ps" > property. > > For older SoCs the only known supported values were 0ns and 2ns. The new > SoCs have 200ps precision and support RGMII RX delays between 0ps and > 3000ps. > > While here, also update the description of the RX delay to indicate > that: > - with "rgmii" or "rgmii-id" the RX delay should be specified > - with "rgmii-id" or "rgmii-rxid" the RX delay is added by the PHY so > any configuration on the MAC side is ignored > - with "rmii" the RX delay is not applicable and any configuration is > ignored > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > --- > .../bindings/net/amlogic,meson-dwmac.yaml | 61 +++++++++++++++++-- > 1 file changed, 56 insertions(+), 5 deletions(-) Don't we have common properties for this now? > > diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml > index 6b057b117aa0..62a1e92a645c 100644 > --- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml > +++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml > @@ -74,17 +74,68 @@ allOf: > Any configuration is ignored when the phy-mode is set to "rmii". > > amlogic,rx-delay-ns: > + deprecated: true > enum: > - 0 > - 2 > default: 0 > + description: > + The internal RGMII RX clock delay in nanoseconds. Deprecated, use > + amlogic,rgmii-rx-delay-ps instead. > + > + amlogic,rgmii-rx-delay-ps: > + default: 0 > description: > The internal RGMII RX clock delay (provided by this IP block) in > - nanoseconds. When phy-mode is set to "rgmii" then the RX delay > - should be explicitly configured. When the phy-mode is set to > - either "rgmii-id" or "rgmii-rxid" the RX clock delay is already > - provided by the PHY. Any configuration is ignored when the > - phy-mode is set to "rmii". > + picoseconds. When phy-mode is set to "rgmii" or "rgmii-id" then > + the RX delay should be explicitly configured. When the phy-mode > + is set to either "rgmii-id" or "rgmii-rxid" the RX clock delay > + is already provided by the PHY so any configuration here is > + ignored. Also any configuration is ignored when the phy-mode is > + set to "rmii". > + > + - if: > + properties: > + compatible: > + contains: > + enum: > + - amlogic,meson8b-dwmac > + - amlogic,meson8m2-dwmac > + - amlogic,meson-gxbb-dwmac > + - amlogic,meson-axg-dwmac > + then: > + properties: > + amlogic,rgmii-rx-delay-ps: > + enum: > + - 0 > + - 2000 > + > + - if: > + properties: > + compatible: > + contains: > + enum: > + - amlogic,meson-g12a-dwmac > + then: > + properties: > + amlogic,rgmii-rx-delay-ps: > + enum: > + - 0 > + - 200 > + - 400 > + - 600 > + - 800 > + - 1000 > + - 1200 > + - 1400 > + - 1600 > + - 1800 > + - 2000 > + - 2200 > + - 2400 > + - 2600 > + - 2800 > + - 3000 > > properties: > compatible: > -- > 2.29.2 >
Hi Rob, On Mon, Dec 7, 2020 at 8:17 PM Rob Herring <robh@kernel.org> wrote: > > On Sun, Nov 15, 2020 at 07:52:06PM +0100, Martin Blumenstingl wrote: > > Amlogic Meson G12A, G12B and SM1 SoCs have a more advanced RGMII RX > > delay register which allows picoseconds precision. Deprecate the old > > "amlogic,rx-delay-ns" in favour of a new "amlogic,rgmii-rx-delay-ps" > > property. > > > > For older SoCs the only known supported values were 0ns and 2ns. The new > > SoCs have 200ps precision and support RGMII RX delays between 0ps and > > 3000ps. > > > > While here, also update the description of the RX delay to indicate > > that: > > - with "rgmii" or "rgmii-id" the RX delay should be specified > > - with "rgmii-id" or "rgmii-rxid" the RX delay is added by the PHY so > > any configuration on the MAC side is ignored > > - with "rmii" the RX delay is not applicable and any configuration is > > ignored > > > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > > --- > > .../bindings/net/amlogic,meson-dwmac.yaml | 61 +++++++++++++++++-- > > 1 file changed, 56 insertions(+), 5 deletions(-) > > Don't we have common properties for this now? I did a quick: $ grep -R rx-delay Documentation/devicetree/bindings/net/ I could find "rx-delay" without vendor prefix, but that's not using any unit in the name (ns, ps, ...) Please let me know if you aware of any "generic" property for the RX delay in picosecond precision Best regards, Martin
On Sun, Dec 13, 2020 at 05:59:05PM +0100, Martin Blumenstingl wrote: > Hi Rob, > > On Mon, Dec 7, 2020 at 8:17 PM Rob Herring <robh@kernel.org> wrote: > > > > On Sun, Nov 15, 2020 at 07:52:06PM +0100, Martin Blumenstingl wrote: > > > Amlogic Meson G12A, G12B and SM1 SoCs have a more advanced RGMII RX > > > delay register which allows picoseconds precision. Deprecate the old > > > "amlogic,rx-delay-ns" in favour of a new "amlogic,rgmii-rx-delay-ps" > > > property. > > > > > > For older SoCs the only known supported values were 0ns and 2ns. The new > > > SoCs have 200ps precision and support RGMII RX delays between 0ps and > > > 3000ps. > > > > > > While here, also update the description of the RX delay to indicate > > > that: > > > - with "rgmii" or "rgmii-id" the RX delay should be specified > > > - with "rgmii-id" or "rgmii-rxid" the RX delay is added by the PHY so > > > any configuration on the MAC side is ignored > > > - with "rmii" the RX delay is not applicable and any configuration is > > > ignored > > > > > > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> > > > --- > > > .../bindings/net/amlogic,meson-dwmac.yaml | 61 +++++++++++++++++-- > > > 1 file changed, 56 insertions(+), 5 deletions(-) > > > > Don't we have common properties for this now? > I did a quick: > $ grep -R rx-delay Documentation/devicetree/bindings/net/ > > I could find "rx-delay" without vendor prefix, but that's not using > any unit in the name (ns, ps, ...) > Please let me know if you aware of any "generic" property for the RX > delay in picosecond precision {rx,tx}-internal-delay-ps in ethernet-controller.yaml and ethernet-phy.yaml.
diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml index 6b057b117aa0..62a1e92a645c 100644 --- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml +++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml @@ -74,17 +74,68 @@ allOf: Any configuration is ignored when the phy-mode is set to "rmii". amlogic,rx-delay-ns: + deprecated: true enum: - 0 - 2 default: 0 + description: + The internal RGMII RX clock delay in nanoseconds. Deprecated, use + amlogic,rgmii-rx-delay-ps instead. + + amlogic,rgmii-rx-delay-ps: + default: 0 description: The internal RGMII RX clock delay (provided by this IP block) in - nanoseconds. When phy-mode is set to "rgmii" then the RX delay - should be explicitly configured. When the phy-mode is set to - either "rgmii-id" or "rgmii-rxid" the RX clock delay is already - provided by the PHY. Any configuration is ignored when the - phy-mode is set to "rmii". + picoseconds. When phy-mode is set to "rgmii" or "rgmii-id" then + the RX delay should be explicitly configured. When the phy-mode + is set to either "rgmii-id" or "rgmii-rxid" the RX clock delay + is already provided by the PHY so any configuration here is + ignored. Also any configuration is ignored when the phy-mode is + set to "rmii". + + - if: + properties: + compatible: + contains: + enum: + - amlogic,meson8b-dwmac + - amlogic,meson8m2-dwmac + - amlogic,meson-gxbb-dwmac + - amlogic,meson-axg-dwmac + then: + properties: + amlogic,rgmii-rx-delay-ps: + enum: + - 0 + - 2000 + + - if: + properties: + compatible: + contains: + enum: + - amlogic,meson-g12a-dwmac + then: + properties: + amlogic,rgmii-rx-delay-ps: + enum: + - 0 + - 200 + - 400 + - 600 + - 800 + - 1000 + - 1200 + - 1400 + - 1600 + - 1800 + - 2000 + - 2200 + - 2400 + - 2600 + - 2800 + - 3000 properties: compatible:
Amlogic Meson G12A, G12B and SM1 SoCs have a more advanced RGMII RX delay register which allows picoseconds precision. Deprecate the old "amlogic,rx-delay-ns" in favour of a new "amlogic,rgmii-rx-delay-ps" property. For older SoCs the only known supported values were 0ns and 2ns. The new SoCs have 200ps precision and support RGMII RX delays between 0ps and 3000ps. While here, also update the description of the RX delay to indicate that: - with "rgmii" or "rgmii-id" the RX delay should be specified - with "rgmii-id" or "rgmii-rxid" the RX delay is added by the PHY so any configuration on the MAC side is ignored - with "rmii" the RX delay is not applicable and any configuration is ignored Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> --- .../bindings/net/amlogic,meson-dwmac.yaml | 61 +++++++++++++++++-- 1 file changed, 56 insertions(+), 5 deletions(-)