From: Andrew Lunn <andrew@lunn.ch>
To: Renze Nicolai <renze@rnplus.nl>
Cc: Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Samuel Holland <samuel@sholland.org>,
Maxime Ripard <maxime@cerno.tech>,
Andre Przywara <andre.przywara@arm.com>,
Conley Lee <conleylee@foxmail.com>,
krzysztof.kozlowski@linaro.org, linux-sunxi@lists.linux.dev,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 2/2] arm64: allwinner: a64: add device tree for SOPINE on Pine64 Clusterboard
Date: Mon, 21 Nov 2022 00:42:14 +0100 [thread overview]
Message-ID: <Y3q7VnjHD+pLdl+H@lunn.ch> (raw)
In-Reply-To: <3351526.aeNJFYEL58@werkpc>
> +&emac {
> + allwinner,tx-delay-ps = <500>;
> +};
Is this direct MAC to MAC without a PHY in the middle? And RGMII?
500ps seems odd. It is normally 1000ps. And you need to specify a
delay for both Rx and Tx. I could understand
&emac {
allwinner,tx-delay-ps = <500>;
allwinner,rx-delay-ps = <500>;
};
then each end adds 1/2 the delay on both Rx and Tx.
Andrew
prev parent reply other threads:[~2022-11-20 23:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-19 12:31 [PATCH 2/2] arm64: allwinner: a64: add device tree for SOPINE on Pine64 Clusterboard Renze Nicolai
2022-11-19 18:14 ` Andre Przywara
2022-11-20 23:42 ` Andrew Lunn [this message]
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