Re: Boot on eMMC

[Gary Thomas <gary@mlbassoc.com>]

On 2015-04-14 09:00, Otavio Salvador wrote:
> On Tue, Apr 14, 2015 at 11:58 AM, Gary Thomas <gary@mlbassoc.com> wrote:
>> On 2015-04-14 08:28, Otavio Salvador wrote:
>>>
>>> On Tue, Apr 14, 2015 at 11:12 AM, Shanx <shanx@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?

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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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