[U-Boot] [PATCH 0/4] Fix operation on Odroid devices

[Jaehoon Chung <jh80.chung@samsung.com>]

Dear, Tobias.

On 09/21/2015 06:34 PM, Tobias Jakobi wrote:
> Hello,
> 
> Jaehoon Chung wrote:
>> Hi,
>>
>> On 09/21/2015 08:18 AM, Tobias Jakobi wrote:
>>> Hello,
>>>
>>> currently operation on Exynos4412-based Odroid devices is broken.
>>>
>>> The bootloader stops with this message:
>>> Card did not respond to voltage select!
>>> *** Warning - MMC init failed, using default environment
>>
>> Which board did you use? and Which cad is failed? SD or eMMC?
> This is an Odroid-X2. I'm booting from SD with a Sandisk Extreme. I
> don't have any eMMC here.

But if your patch is applied, other exynos4412 and exynos using s5p_sdhci don't work fine for SD-card.
This case is the specific X2 board. I think schematic is wrong.
(I have checked the Odrodd_X-base_Rev_06.pdf)

Commonly, SD-detect pin is supplied to always-on power.
But odroid-x/u board used the same supplier with I/O line. It's wrong.

This is H/W mis-designed problem, not code problem.
Well, I will reproduce your problem with X2 board.
And if reproduced your problem, I will find other solution, not this. how about?

> 
> Actually it was some other person who encountered this issue with his
> Odroid-X2 and booting from SD. After he made me aware of it, I also
> updated my u-boot (I was then using a version from May 2015, which works
> perfectly btw) and encountered the very same issue as him.
> 

Need to consider other SoC. You seems to consider only Odroid based-on exyno4412.
Did you test other exynos4412 board?

Best Regards,
Jaehoon Chung

> 
> 
>> Your [PATCH 4/4] is strange..so i want to get more information.
> For me it restores proper operation of the bootloader to the board.
> 
> 
> With best wishes,
> Tobias
> 
> 
>>
>> If you can share more information, i can explain more exactly about your problem.
>>
>> Best Regards,
>> Jaehoon Chung
>>
>>>
>>> This series fixes error handling in the s5p sdhci driver
>>> and the cause of the issue, which is an inverted card
>>> detection check.
>>>
>>> Thanks goes to Marek Vasut and Sjoerd Simons who helped
>>> me on IRC to get this triaged.
>>>
>>> With best wishes,
>>> Tobias
>>>
>>> Tobias Jakobi (4):
>>>   exynos: Properly initialize host_caps in s5p_sdhci_core_init()
>>>   exynos: Fix passing of errors in exynos_mmc_init()
>>>   exynos: be more verbose in process_nodes()
>>>   exynos: fix and cleanup do_sdhci_init()
>>>
>>>  drivers/mmc/s5p_sdhci.c | 39 +++++++++++++++++++++++----------------
>>>  1 file changed, 23 insertions(+), 16 deletions(-)
>>>
>>
> 
>