Re: [PATCH net-next v3 1/5] dt-bindings: net: Add Motorcomm yt8xxx ethernet phy

Frank.Sae
2023-01-31T02:22:09Z

Hi Andrew,

On 2023/1/30 22:03, Andrew Lunn wrote:
> On Mon, Jan 30, 2023 at 02:35:35PM +0800, Frank Sae wrote:
>> Add a YAML binding document for the Motorcom yt8xxx Ethernet phy driver.
>>
>> Signed-off-by: Frank Sae <Frank.Sae@motor-comm.com>
>> ---
>> .../bindings/net/motorcomm,yt8xxx.yaml | 102 ++++++++++++++++++
>> .../devicetree/bindings/vendor-prefixes.yaml | 2 +
>> MAINTAINERS | 1 +
>> 3 files changed, 105 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
>> new file mode 100644
>> index 000000000000..8527576c15b3
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
>> @@ -0,0 +1,102 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/net/motorcomm,yt8xxx.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: MotorComm yt8xxx Ethernet PHY
>> +
>> +maintainers:
>> + - frank sae <frank.sae@motor-comm.com>
>> +
>> +allOf:
>> + - $ref: ethernet-phy.yaml#
>> +
>> +properties:
>> + rx-internal-delay-ps:
>> + description: |
>> + RGMII RX Clock Delay used only when PHY operates in RGMII mode with
>> + internal delay (phy-mode is 'rgmii-id' or 'rgmii-rxid') in pico-seconds.
>> + enum: [ 0, 150, 300, 450, 600, 750, 900, 1050, 1200, 1350, 1500, 1650,
>> + 1800, 1900, 1950, 2050, 2100, 2200, 2250, 2350, 2500, 2650, 2800,
>> + 2950, 3100, 3250, 3400, 3550, 3700, 3850, 4000, 4150 ]
>> + default: 1950
>
> Ah! There has been a misunderstand. Yes, this changes does make sense, but >
>> +
>> + tx-internal-delay-ps:
>> + description: |
>> + RGMII TX Clock Delay used only when PHY operates in RGMII mode with
>> + internal delay (phy-mode is 'rgmii-id' or 'rgmii-txid') in pico-seconds.
>> + enum: [ 0, 150, 300, 450, 600, 750, 900, 1050, 1200, 1350, 1500, 1650, 1800,
>> + 1950, 2100, 2250 ]
>> + default: 150
>
> ... i was actually trying to say this 150 is odd. Why is this not
> 1950?

Tx-delay is usually adjusted by the mac (~ 2ns).
So here is only fine-turn for the tx-delay.

>
> Andrew