From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Vasut Date: Tue, 14 Oct 2014 23:38:35 +0200 Subject: [U-Boot] [PATCH V7] ARM: mx6: Add support for Kosagi Novena In-Reply-To: <543A20B1.5000500@kosagi.com> References: <1412990082-8628-1-git-send-email-marex@denx.de> <543A20B1.5000500@kosagi.com> Message-ID: <201410142338.35674.marex@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 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