On 07/18/2012 03:47 PM, Jassi Brar wrote:
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> ?
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.
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
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