Re: Devicetree: Initialization order of mmc block devices?
On 07/18/2012 03:47 PM, Jassi Brar wrote:
Because we are talking about an embedded device, it is very difficult to get a UUID of a eMMC partition into kernel command line with U-Boot. Handling of UUID is also a big effort at board manufacturing.On 18 July 2012 15:19, Knut Wohlrab <knut.wohlrab@xxxxxxxxxxxx> wrote:If a SD card is inserted at boot time, its "mmcblk0", the embedded MMC (eMMC) device "mmcblk1". This makes it difficult to give the kernel the correct device for the eMMC root file system ("root=/dev/mmcblk?p1 ...").How about root=UUID=<eMMC-partition> ?
Startup speed is very important for us. Searching for UUID on several MMC/SD devices will significant slow down the boot process.
This problem can occur on many devices with embedded MMC and removable SD, e.g. smart phones. So I think we should find an solution to define MMC scan order or device number/name in a device tree.
Thanks and regards Knut -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html