netdev - Re: [PATCH net-next] net: gemini: allow any RGMII interface mode

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Date:   Tue, 4 Jan 2022 20:53:41 +0100
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next] net: gemini: allow any RGMII interface mode

Le Tue, Jan 04, 2022 at 04:38:31PM +0000, Russell King (Oracle) a écrit :
> The four RGMII interface modes take care of the required RGMII delay
> configuration at the PHY and should not be limited by the network MAC
> driver. Sadly, gemini was only permitting RGMII mode with no delays,
> which would require the required delay to be inserted via PCB tracking
> or by the MAC.
> 
> However, there are designs that require the PHY to add the delay, which
> is impossible without Gemini permitting the other three PHY interface
> modes. Fix the driver to allow these.
> 
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
>  drivers/net/ethernet/cortina/gemini.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)

Tested-by: Corentin Labbe <clabbe.montjoie@...il.com>

Thanks!