From: David Miller <davem@davemloft.net>
To: alex.g@adaptrum.com
Cc: f.fainelli@gmail.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] net/phy/vitesse: Configure RGMII skew on VSC8601, if needed
Date: Wed, 16 Nov 2016 17:54:23 -0500 (EST) [thread overview]
Message-ID: <20161116.175423.1067471964290543367.davem@davemloft.net> (raw)
In-Reply-To: <1479286953-11481-1-git-send-email-alex.g@adaptrum.com>
From: Alexandru Gagniuc <alex.g@adaptrum.com>
Date: Wed, 16 Nov 2016 01:02:33 -0800
> With RGMII, we need a 1.5 to 2ns skew between clock and data lines. The
> VSC8601 can handle this internally. While the VSC8601 can set more
> fine-grained delays, the standard skew settings work out of the box.
> The same heuristic is used to determine when this skew should be enabled
> as in vsc824x_config_init().
>
> Tested on custom board with AM3352 SOC and VSC801 PHY.
>
> Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
> ---
> Changes since v1:
> * Added comment detailing applicability to different RGMII interfaces.
Applied.
prev parent reply other threads:[~2016-11-16 22:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-12 23:32 [PATCH] net/phy/vitesse: Configure RGMII skew on VSC8601, if needed Alexandru Gagniuc
2016-11-14 21:18 ` David Miller
2016-11-14 21:25 ` Florian Fainelli
2016-11-14 21:54 ` Alex
2016-11-16 3:12 ` David Miller
2016-11-16 9:02 ` [PATCH v2] " Alexandru Gagniuc
2016-11-16 13:50 ` Andrew Lunn
2016-11-16 16:44 ` Alex
2016-11-16 16:54 ` Andrew Lunn
2016-11-16 17:10 ` Alex
2016-11-16 22:54 ` David Miller [this message]
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