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
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