From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Tseng Subject: TWL scripts, and booting pm-2.6.29 on Beagleboard Date: Tue, 27 Jul 2010 17:41:24 -0400 Message-ID: <4C4F5284.9050400@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-vw0-f46.google.com ([209.85.212.46]:35270 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752785Ab0G0VlB (ORCPT ); Tue, 27 Jul 2010 17:41:01 -0400 Received: by vws3 with SMTP id 3so3791566vws.19 for ; Tue, 27 Jul 2010 14:41:00 -0700 (PDT) Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "linux-omap@vger.kernel.org" Hello everyone. I am attempting to get the branch named pm-2.6.29 of Kevin Hilman's linux-omap-pm repo to boot on a Beagleboard revision B5. The purpose of this is to apply some patches made by Russ Dill about a year ago [1] that allow a low-power sleep by adding some TWL scripts. I have been unable to determine whether these are working with the branch named pm (I am aware that the second and fourth patch are already applied, so I only need the first and third), so I figured it was best to start from the same point that Russ Dill started at, which he reports is pm-2.6.29 The trouble is that pm-2.6.29 does not boot (I boot from an SD card, use the config file named omap3_beagle_pm_defconfig, and use u-boot 2009.11) -- no output is printed after "Uncompressing Linux... done, booting the kernel." Normally, I would enable CONFIG_EARLY_PRINTK and provide some resulting output, but this option seems to be missing from the branch in question. I asking for help in one of the following: 1) Whether there is any alternative way to get useful output to diagnose why pm-2.6.29 is not booting. 2) How to apply the patch similarly to the current pm branch. (Have the relevant sections been moved to a generic file at board-3430sdp.c ? Is there anything else I need to know? Is there documentation on what exactly these scripts are doing?) 3) Whether there's any alternative way to achieve the same objectives of power savings. I appreciate your support in this. Peter Tseng [1] http://groups.google.com/group/beagleboard/browse_thread/thread/197a8ef6b46cc828/6e98db4cbe2cebaa