[U-Boot] [PATCH] rockchip: rk3288-firefly: enable boot from eMMC

[Simon Glass]

Hi,

On 29 August 2016 at 21:02, 陈豪 <jacobchen110 at gmail.com> wrote:
> Hi,
>
> You probably did not short the clock of eMMC.
> If we don't press maskrom buttons(short the clock of eMMC), SPL will
> detect eMMC and try to load image from eMMC. if the eMMC is blank, it
> hangs.
> So if we specifies board_boot_order and want to boot from SD in
> FireFly, we have to short the clock of eMMC.
>
> The current code(spl_boot_device)  will force to boot from SD rather
> than boot from whatever media it started
> with,.So we have to specifies board_boot_order if we want to boot from eMMC.
>
> Of course, It might be inconvenie to short the clock of eMMC in
> FireFly. Do you have any better idea?
>

(Please don't top post)

I think that if it boots from SD then it should continue to boot from
SD: SPL -> U-Boot -> Linux

If it boots from eMMC then it should continue to boot from eMMC.

How can we do this? Presumably there is a way to find out how we booted?

- Simon


> 2016-08-30 0:17 GMT+08:00 陈豪 <jacobchen110 at gmail.com>:
>> Hi,
>>
>> I just copied thos code from the other boards.
>>
>> On the other boards, I didn't meet this situation.It will load u-boot
>> from sd if it didn't detect u-boot in eMMC.
>>
>> I'll check why it's different in firefly.
>>
>> 2016-08-28 0:06 GMT+08:00, Simon Glass <sjg at chromium.org>:
>>> Hi,
>>>
>>> On 12 August 2016 at 11:20, Simon Glass <sjg at chromium.org> wrote:
>>>> On 9 August 2016 at 19:56, Jacob Chen <jacob2.chen at rock-chips.com> wrote:
>>>>> Add eMMC dt node and define fallback boot devices.
>>>>>
>>>>> Signed-off-by: Jacob Chen <jacob2.chen at rock-chips.com>
>>>>> ---
>>>>>
>>>>>  arch/arm/dts/rk3288-firefly.dts               | 5 +++++
>>>>>  board/firefly/firefly-rk3288/firefly-rk3288.c | 8 ++++++++
>>>>>  2 files changed, 13 insertions(+)
>>>>
>>>> Acked-by: Simon Glass <sjg at chromium.org>
>>>
>>> Unfortunately I cannot apply this. It appears to actually force
>>> booting from eMMC. So if the eMMC is blank, it hangs at 'Trying to
>>> boot from MMC2'.
>>>
>>> I think it should continue to boot from whatever media it started
>>> with. So if it booted SPL from SD then it should load U-Boot from SD.
>>>
>>> Regards,
>>> Simon
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