On 17.12.2013 14:48, Balaji T K wrote: > 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. Ah, yes. I had already tried with your 7 patches series (v4). But it seems that I forgot to add CONFIG_MFD_SYSCON and CONFIG_REGULATOR_PBIAS. With this now, the SD card is detected even without any U-Boot activity. Thanks, Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
