From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH V7] ARM: mx6: Add support for Kosagi Novena
Date: Tue, 14 Oct 2014 23:38:35 +0200 [thread overview]
Message-ID: <201410142338.35674.marex@denx.de> (raw)
In-Reply-To: <543A20B1.5000500@kosagi.com>
On Sunday, October 12, 2014 at 08:33:21 AM, Sean Cross wrote:
> On 12/10/2014 05:04, Fabio Estevam wrote:
> > On Sat, Oct 11, 2014 at 11:21 AM, Sean Cross <xobs@kosagi.com> wrote:
> >>> Ok, understood. Just curious: which Ethernet PHY is used on the novena
> >>> board?
> >>
> >> It's the same Micrel PHY used on the Sabrelite, the KSZ9021.
> >
> > nitrogen/sabrelite holds Ethernet PHY reset low for 10ms, which is in
> > accordance with ksz9021 datasheet.
> >
> > Shouldn't we wait 10ms here as well?
>
> The reference manual for the PHY indicates that you should hold reset
> low for 10ms after the supply voltage stabilizes. So long as it takes
> at least 10msto get from the point at which the CPU starts executing its
> ROM code to the point at which the reset line is toggled, we will be fine.
This definitelly is the case, so I presume we don't need the delay ?
Best regards,
Marek Vasut
next prev parent reply other threads:[~2014-10-14 21:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-11 1:14 [U-Boot] [PATCH V7] ARM: mx6: Add support for Kosagi Novena Marek Vasut
2014-10-11 1:39 ` Fabio Estevam
2014-10-11 5:01 ` Nikolay Dimitrov
2014-10-11 13:56 ` Fabio Estevam
2014-10-11 14:21 ` Sean Cross
2014-10-11 21:04 ` Fabio Estevam
2014-10-12 6:33 ` Sean Cross
2014-10-14 21:38 ` Marek Vasut [this message]
2014-10-15 4:47 ` Nikolay Dimitrov
2014-10-15 7:47 ` Sean Cross
2014-10-15 19:16 ` Nikolay Dimitrov
2014-10-16 2:38 ` Sean Cross
2014-10-16 23:32 ` Fabio Estevam
2014-10-16 10:21 ` Marek Vasut
2014-10-16 17:17 ` Fabio Estevam
2014-10-16 23:02 ` Marek Vasut
2014-10-16 23:27 ` Fabio Estevam
2014-10-17 13:55 ` Marek Vasut
2014-10-14 21:40 ` Marek Vasut
2014-10-11 1:44 ` Fabio Estevam
2014-10-11 18:43 ` Marek Vasut
2014-10-11 20:56 ` Fabio Estevam
2014-10-11 5:10 ` Nikolay Dimitrov
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