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Date:   Fri, 24 Jun 2022 19:37:08 +0200
From:   Andrew Lunn <andrew@lunn.ch>
To:     Sebastian Reichel <sebastian.reichel@collabora.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
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        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
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        netdev@vger.kernel.org, linux-rockchip@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
        David Wu <david.wu@rock-chips.com>, kernel@collabora.com
Subject: Re: [PATCH 1/3] net: ethernet: stmmac: dwmac-rk: Disable delayline
 if it is invalid
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> The Rockchip hardware supports enabling/disabling delays and
> configuring a delay value of 0x00-0x7f. For the RK3588 evaluation
> board the RX delay should be disabled.

So you can just put 0 in DT then.

   Andrew