From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH] omap4: Fix ULPI PHY init for ES1.0 SDP (Re: 4430SDP boot failure) Date: Wed, 2 Feb 2011 11:50:20 -0800 Message-ID: <20110202195019.GB3322@atomide.com> References: <20110106180030.GA8249@n2100.arm.linux.org.uk> <20110106182023.GV7771@atomide.com> <20110106203238.GH1198@n2100.arm.linux.org.uk> <20110106204053.GA7771@atomide.com> <20110107161230.GR1198@n2100.arm.linux.org.uk> <20110110185209.GC4957@atomide.com> <20110111231611.GX4957@atomide.com> <3c13ae6d9e13b94548bfcaaced7681e8@mail.gmail.com> <20110202011006.GP3358@atomide.com> <3d41cb89c4a3a3fa93ded7aa9dfaa14d@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mho-02-ewr.mailhop.org ([204.13.248.72]:42046 "EHLO mho-02-ewr.mailhop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751266Ab1BBTug (ORCPT ); Wed, 2 Feb 2011 14:50:36 -0500 Content-Disposition: inline In-Reply-To: <3d41cb89c4a3a3fa93ded7aa9dfaa14d@mail.gmail.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Anand Gadiyar Cc: Russell King - ARM Linux , linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, Keshava Munegowda , Santosh Shilimkar , Felipe Balbi * Anand Gadiyar [110202 10:51]: > Tony Lindgren wrote: > > * Anand Gadiyar [110201 04:54]: > > > > > > I believe this fix is fixing your reboot issue, but it's breaking > > > EHCI support on the SDP. > > > > > > The MODE4 above should really be MODE3 - all GPIOs are on MODE3. > > > By changing > > > > > > The patch snippet below fixes EHCI on the SDP, but I believe that > > > making this change will reintroduce the "board reboots" issue > > > you originally reported. Could you check and tell me if this > > > is the case? > > > > Hmm sorry looks like I made a typo there. That should be fixed. > > > > > Just curious - is your board a Blaze, or an SDP? > > > > It's a ES1.0 blaze, with the patch below it reboots early > > during the boot. I also have to disable omap_l2_cache_init > > on this board to get it to boot. > > > > ... > > > Maybe there should be a check for ES1.0 for the USB also? > > Looks like a bug on the Blaze boards. There's a large capacitor > on the rails that starts charging when we try to power the USB PHY. > The inrush current is quite high and this causes the reboot. > > The capacitor is on the big motherboard called the application > board, so it's independent of the silicon rev. I'm not sure > which revs are affected - I'll try and find out more about the > issue to see if I can come up with a better fix. OK thanks. Tony