Re: [PATCH net-next v4 1/4] dt-bindings: net: Add tx and rx internal delays
From: Rob Herring
Date: Fri May 29 2020 - 14:25:49 EST
On Wed, May 27, 2020 at 11:49:31AM -0500, Dan Murphy wrote:
> tx-internal-delays and rx-internal-delays are a common setting for RGMII
> capable devices.
> These properties are used when the phy-mode or phy-controller is set to
> rgmii-id, rgmii-rxid or rgmii-txid. These modes indicate to the
> controller that the PHY will add the internal delay for the connection.
> Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
> .../bindings/net/ethernet-controller.yaml | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
> diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
> index ac471b60ed6a..70702a4ef5e8 100644
> --- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
> +++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
> @@ -143,6 +143,20 @@ properties:
> Specifies the PHY management type. If auto is set and fixed-link
> is not specified, it uses MDIO for management.
> + rx-internal-delay-ps:
> + $ref: /schemas/types.yaml#definitions/uint32
> + description: |
> + RGMII Receive PHY Clock Delay defined in pico seconds. This is used for
> + PHY's that have configurable RX internal delays. This property is only
> + used when the phy-mode or phy-connection-type is rgmii-id or rgmii-rxid.
Isn't this a property of the phy (this is the controller schema)? Looks
like we have similar properties already and they go in phy nodes. Would
be good to have a standard property, but let's be clear where it goes.
We need to add '-ps' as a standard unit suffix (in dt-schema) and then a
type is not needed here.