linux-kernel - Re: [PATCH net-next 2/2] net: phy: Introduce PSGMII PHY interface mode

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Date:   Fri, 11 Aug 2023 12:54:19 +0200
From:   Simon Horman <horms@...nel.org>
To:     Robert Marko <robert.marko@...tura.hr>
Cc:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, luka.perkov@...tura.hr,
        Gabor Juhos <j4g8y7@...il.com>
Subject: Re: [PATCH net-next 2/2] net: phy: Introduce PSGMII PHY interface
 mode

On Thu, Aug 10, 2023 at 12:22:55PM +0200, Robert Marko wrote:
> From: Gabor Juhos <j4g8y7@...il.com>
> 
> The PSGMII interface is similar to QSGMII. The main difference
> is that the PSGMII interface combines five SGMII lines into a
> single link while in QSGMII only four lines are combined.
> 
> Similarly to the QSGMII, this interface mode might also needs
> special handling within the MAC driver.
> 
> It is commonly used by Qualcomm with their QCA807x PHY series and
> modern WiSoC-s.
> 
> Add definitions for the PHY layer to allow to express this type
> of connection between the MAC and PHY.
> 
> Signed-off-by: Gabor Juhos <j4g8y7@...il.com>
> Signed-off-by: Robert Marko <robert.marko@...tura.hr>

...

> diff --git a/include/linux/phy.h b/include/linux/phy.h
> index ba08b0e60279..23756a10d40b 100644
> --- a/include/linux/phy.h
> +++ b/include/linux/phy.h
> @@ -147,6 +147,7 @@ typedef enum {
>  	PHY_INTERFACE_MODE_XGMII,
>  	PHY_INTERFACE_MODE_XLGMII,
>  	PHY_INTERFACE_MODE_MOCA,
> +	PHY_INTERFACE_MODE_PSGMII,

Hi Gabor an Robert,

Please add PHY_INTERFACE_MODE_PSGMII to the kernel doc for phy_interface_t
which appears a little earlier in phy.h

>  	PHY_INTERFACE_MODE_QSGMII,
>  	PHY_INTERFACE_MODE_TRGMII,
>  	PHY_INTERFACE_MODE_100BASEX,

...