From: David Miller <davem@davemloft.net>
To: u.kleine-koenig@pengutronix.de
Cc: rmk+kernel@arm.linux.org.uk, Frank.Li@freescale.com,
LW@KARO-electronics.de, fabio.estevam@freescale.com,
kernel@pengutronix.de, netdev@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] net: fec: setup right value for mdio hold time
Date: Sun, 29 Mar 2015 13:41:01 -0700 (PDT) [thread overview]
Message-ID: <20150329.134101.916097441015561162.davem@davemloft.net> (raw)
In-Reply-To: <1427450912-9793-1-git-send-email-u.kleine-koenig@pengutronix.de>
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Fri, 27 Mar 2015 11:08:32 +0100
> The FEC modules used on i.MX28 and newer have a register to tune the MDIO
> output hold time that should be at least 10 ns. Up to now this value was not
> explicitly set and so resulted in less hold time if the fec clock was
> faster than 100 MHz.
>
> This was noticed on an i.MX28 machine that uses an input clock of ~150
> Mhz which resulted in unreliable communication with a Marvell switch.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Applied.
prev parent reply other threads:[~2015-03-29 20:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-27 10:08 [PATCH] net: fec: setup right value for mdio hold time Uwe Kleine-König
2015-03-29 20:41 ` David Miller [this message]
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