linux-kernel - Re: [PATCH RFC v2 5/5] net: stmmac: dwmac-meson8b: add support for the RGMII RX delay on G12A

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Message-ID: <20201117020659.GE1752213@lunn.ch>
Date:   Tue, 17 Nov 2020 03:06:59 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     davem@...emloft.net, kuba@...nel.org,
        linux-amlogic@...ts.infradead.org, devicetree@...r.kernel.org,
        robh+dt@...nel.org, netdev@...r.kernel.org,
        jianxin.pan@...ogic.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, khilman@...libre.com,
        narmstrong@...libre.com, jbrunet@...libre.com, f.fainelli@...il.com
Subject: Re: [PATCH RFC v2 5/5] net: stmmac: dwmac-meson8b: add support for
 the RGMII RX delay on G12A

On Sun, Nov 15, 2020 at 07:52:10PM +0100, Martin Blumenstingl wrote:
> Amlogic Meson G12A (and newer: G12B, SM1) SoCs have a more advanced RX
> delay logic. Instead of fine-tuning the delay in the nanoseconds range
> it now allows tuning in 200 picosecond steps. This support comes with
> new bits in the PRG_ETH1[19:16] register.
> 
> Add support for validating the RGMII RX delay as well as configuring the
> register accordingly on these platforms.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew