From mboxrd@z Thu Jan 1 00:00:00 1970 From: Balaji T K Subject: Re: mmc only working when used in U-Boot Date: Tue, 17 Dec 2013 19:18:12 +0530 Message-ID: <52B0561C.5050300@ti.com> References: <52B05478.1040606@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from bear.ext.ti.com ([192.94.94.41]:54271 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750929Ab3LQNsQ (ORCPT ); Tue, 17 Dec 2013 08:48:16 -0500 In-Reply-To: <52B05478.1040606@gmail.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Stefan Roese Cc: linux-omap , Tony Lindgren On Tuesday 17 December 2013 07:11 PM, Stefan Roese wrote: > Hi! > > I've noticed on a custom OMAP3530 board, that the SDcard (mmc1) is only > detected, when its previously used in U-Boot (e.g. by "mmc rescan"). So > I tested on beagleboard and it behaved identical. > > Here the boot log with U-Boot scanning mmc before Linux booting: > > root@generic-armv7a:~# dmesg | grep mmc > [ 2.225006] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/mmc@4809c000[0]' > [ 2.234100] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/mmc@4809c000[0]' > [ 2.260040] omap_hsmmc 4809c000.mmc: pins are not configured from the driver > [ 2.398071] mmc0: host does not support reading read-only switch. assuming write-enable. > [ 2.408416] mmc0: new high speed SD card at address 0007 > [ 2.419128] mmcblk0: mmc0:0007 SD02G 1.90 GiB > [ 2.426025] mmcblk0: p1 p2 > [ 10.241638] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) > [ 10.256011] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck. > > Here the boot log without U-Boot touching mmc before Linux booting: > > root@generic-armv7a:~# dmesg | grep mmc > [ 2.162689] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/mmc@4809c000[0]' > [ 2.171936] of_get_named_gpiod_flags: can't parse gpios property of node '/ocp/mmc@4809c000[0]' > [ 2.197906] omap_hsmmc 4809c000.mmc: pins are not configured from the driver > > I also added the pin mux'es for the mmc to the dts and the last message > is gone. But this doesn't help with mmc detection. > > BTW: This is on latest mainline Linux. > > Somehow U-Boot configured/enables something that is missing in the > Linux driver. Is this a known issue? Any ideas? > If you are using dt boot, mostly likely it is because of missing pbias configuration. > Thanks, > Stefan >