linux-kernel - Re: [PATCH v7 3/4] dt-bindings: ethernet-phy: add optional brr-mode flag

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Date: Mon, 17 Jun 2024 17:25:00 +0100
From: Conor Dooley <conor@...nel.org>
To: Kamil Horák - 2N <kamilh@...s.com>
Cc: florian.fainelli@...adcom.com, bcm-kernel-feedback-list@...adcom.com,
	andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 3/4] dt-bindings: ethernet-phy: add optional brr-mode
 flag

On Mon, Jun 17, 2024 at 01:38:40PM +0200, Kamil Horák - 2N wrote:
> There is a group of PHY chips supporting BroadR-Reach link modes in
> a manner allowing for more or less identical register usage as standard
> Clause 22 PHY.
> These chips support standard Ethernet link modes as well, however, the
> circuitry is mutually exclusive and cannot be auto-detected.
> The link modes in question are 100Base-T1 as defined in IEEE802.3bw,
> based on Broadcom's 1BR-100 link mode, and newly defined 10Base-T1BRR
> (1BR-10 in Broadcom documents).
> 
> Add optional brr-mode flag to switch the PHY to BroadR-Reach mode.
> 
> Signed-off-by: Kamil Horák - 2N <kamilh@...s.com>

I suspect that "- 2N" is not part of your name, and should be removed
from the signoff and commit author fields.
The patch seems fine, to a phy-agnostic such as myself, so with that
fixed up
Acked-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks,
Conor.

> ---
>  Documentation/devicetree/bindings/net/ethernet-phy.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> index 8fb2a6ee7e5b..0353ef98f2e1 100644
> --- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> +++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
> @@ -93,6 +93,13 @@ properties:
>        the turn around line low at end of the control phase of the
>        MDIO transaction.
>  
> +  brr-mode:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description:
> +      Request the PHY to operate in BroadR-Reach mode. This means the
> +      PHY will use the BroadR-Reach protocol to communicate with the other
> +      end of the link, including LDS auto-negotiation if applicable.
> +
>    clocks:
>      maxItems: 1
>      description:
> -- 
> 2.39.2
> 

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