[meta-freescale] Boot on eMMC

[Otavio Salvador]

On Tue, Apr 14, 2015 at 12:04 PM, Gary Thomas <gary at mlbassoc.com> wrote:
> On 2015-04-14 09:00, Otavio Salvador wrote:
>>
>> On Tue, Apr 14, 2015 at 11:58 AM, Gary Thomas <gary at mlbassoc.com> wrote:
>>>
>>> On 2015-04-14 08:28, Otavio Salvador wrote:
>>>>
>>>>
>>>> On Tue, Apr 14, 2015 at 11:12 AM, Shanx <shanx at legtux.org> wrote:
>>>>>
>>>>>
>>>>> Hello,
>>>>> I've tried a lot of things, but I can't boot on eMMC. I've flashed it
>>>>> from
>>>>> u-boot, or from the system (booted from the sdcard). For exemple, I've
>>>>> tried
>>>>> : dd if=rootfs.sdcard of=/dev/mmcblk3
>>>>> I've also tried to flash only u-boot.imx (with dd and seek=2)
>>>>>
>>>>> When booting on eMMC (with the boot switch setup given on the Linux
>>>>> User
>>>>> Guide), nothing append. Any idea why ?
>>>>
>>>>
>>>>
>>>> eMMC has some details which differ from the uSD normal usage. Mainly
>>>> regarding the use of Boot Partitions. So you must to write it to the
>>>> boot partition otherwise it won't work.
>>>>
>>>
>>> I'm not sure this is correct.  I have an i.MX6Q board which has
>>> eMMC on SD4 and SD on SD3 and I can boot from either, using the
>>> same command to install U-Boot
>>>    dd if=/tmp/disk/${UBOOT_NAME} of=${DISK} seek=2 bs=512 conv=notrunc
>>>
>>> Maybe it's a difference in the eMMC device (mine is Sandisk SDIN5
>>> (or7)C2-32G-L)
>>
>>
>> It depends if Boot Partition is enabled or not.
>>
>
> Is that an i.MX6 setting?

No; it is eMMC 4.41 (or later) one if IIRC. There are some fields
exposed in sysfs and also a mmc-utils package at meta-oe.

-- 
Otavio Salvador                             O.S. Systems
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