netdev - Re: [PATCH net-next 1/6] phy: add 2.5G SGMII mode to the phy

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Message-ID: <20180103143541.GE21727@kwain>
Date:   Wed, 3 Jan 2018 15:35:41 +0100
From:   Antoine Tenart <antoine.tenart@...e-electrons.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Antoine Tenart <antoine.tenart@...e-electrons.com>,
        Andrew Lunn <andrew@...n.ch>,
        thomas.petazzoni@...e-electrons.com, ymarkman@...vell.com,
        jason@...edaemon.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...linux.org.uk, kishon@...com,
        nadavh@...vell.com, miquel.raynal@...e-electrons.com,
        gregory.clement@...e-electrons.com, stefanc@...vell.com,
        mw@...ihalf.com, davem@...emloft.net,
        linux-arm-kernel@...ts.infradead.org,
        sebastian.hesselbarth@...il.com
Subject: Re: [PATCH net-next 1/6] phy: add 2.5G SGMII mode to the phy_mode
 enum

Hi Florian,

On Thu, Dec 28, 2017 at 06:16:51AM -0800, Florian Fainelli wrote:
> On 12/28/2017 02:06 AM, Antoine Tenart wrote:
> > On Thu, Dec 28, 2017 at 08:20:53AM +0100, Andrew Lunn wrote:
> >> On Wed, Dec 27, 2017 at 11:14:41PM +0100, Antoine Tenart wrote:
> >>> This patch adds one more generic PHY mode to the phy_mode enum, to allow
> >>> configuring generic PHYs to the 2.5G SGMII mode by using the set_mode
> >>> callback.
> >>>
> >>> Signed-off-by: Antoine Tenart <antoine.tenart@...e-electrons.com>
> >>> ---
> >>>  include/linux/phy/phy.h | 1 +
> >>>  1 file changed, 1 insertion(+)
> >>>
> >>> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> >>> index 4f8423a948d5..70459a28f3a1 100644
> >>> --- a/include/linux/phy/phy.h
> >>> +++ b/include/linux/phy/phy.h
> >>> @@ -28,6 +28,7 @@ enum phy_mode {
> >>>  	PHY_MODE_USB_DEVICE,
> >>>  	PHY_MODE_USB_OTG,
> >>>  	PHY_MODE_SGMII,
> >>> +	PHY_MODE_SGMII_2_5G,
> >>>  	PHY_MODE_10GKR,
> >>>  	PHY_MODE_UFS_HS_A,
> >>>  	PHY_MODE_UFS_HS_B,
> >>
> >> There was a discussion maybe last month about adding 2.5G SGMII. I
> >> would prefer 2500SGMII. Putting the number first makes it uniform with
> >> the other defines, 1000BASEX, 25000BASEX, 10GKR.
> > 
> > Good to know. I wasn't completely sure how to name this mode properly,
> > but I'm fine with PHY_MODE_2500SGMII. I'll update the patches and send a
> > v2 (without the dt part).
> 
> And since you are respinning, please make sure you update phy_modes() in
> the same header file as well as
> Documentation/devicetree/bindings/net/ethernet.txt with the newly added
> PHY interface mode.

Actually it's a generic PHY mode I'm adding, not a network PHY mode.
There's no phy_modes() function for generic PHYs (and this 2500BaseX
mode already is supported in the network PHY modes).

Thanks!
Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com