[U-Boot] [linux-sunxi] [UBOOT NAND] [PATCH 0/4] Add nand reading support to u-boot

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 07-01-15 08:15, Daniel Kochma?ski wrote:
> Hi,
>
> Hans de Goede writes:
>
>> Hi,
>>
>> On 06-01-15 12:57, Yassin Jaffer wrote:
>>>
>>> Hi Hans
>>>
>>> I was working on utilizing the DM framework for the nand driver, but this
>>> is going to take sometime , anyway I will try to submit the driver based on
>>> bbrezillon work.
>>
>> Ok, thanks. I'm looking forward to the posting of the next version of your
>> series.
>>
>>> I'm quite happy if Daniel wants to pickup my work,
>>
>> It looks to me like Daniel may have more time to work on this atm then you,
>> so that might be a good idea. Either way please coordinate with each other
>> to avoid double work. You can use private mail to Daniel for the coordination
>> stuff if you prefer, it would be nice if you could send a short summary of
>> who plans to do what once that is clear.
>
> I'd be glad to, but I have limited time to devote for this project, and
> I might me not be as that helpful as you expect me to.
>>
>>   > besides Daniel patches are for the SPL nand driver.
>>
>> We should be able to use your adaption of Boris' work in the SPL too, for
>> mmc we are also using the same driver in both SPL and regular u-boot, and I
>> assume that Daniel's patches are also capable of loading say a kernel from
>> nand, right Daniel ?
>
> I'm not sure if I remember correctly, but I had problems with adaptation
> of lichee driver for nand, because it was too big to fit in SPL (BROM
> expects boot0 to fit at first 8K).
>
> Yes, these patches are capable of this. I haven't included patch which
> added MBOOT functionality, since it seems unrelated to nand
> support. Putting it short, it was downloading multiimage from mtd2
> (which had 16M in my config), and extracted from it kernel, devicetree,
> ramdisk and u-boot script which was performing boot.
>>
>> Regards,
>>
>> Hans
>>
>>
>>>
>>> Regards
>>>
>>> On Tuesday, January 6, 2015 12:08:48 AM UTC+11, Hans de Goede wrote:
>>>>
>>>> Hi,
>>>>
>>>> On 02-01-15 09:53, Daniel Kochma?ski wrote:
>>>>> This is a series of patches to enable nand read functionality on sunxi
>>>>> devices. It uses DMA and is able to read from syndrome partitions and
>>>>> normal ones. Additionaly mksunxiboot tool is patched to be able to
>>>>> format resulting binary to be able to read from BROM, so NAND SPL builds
>>>>> are now possible. a20_nandread command is added for conveniance.
>>>>>
>>>>> Afaik DMA controller doesn't vary between a10 and a20, so this should
>>>>> work on a10 devices, but due to no a10 hardware it wasn't tested.
>>>>
>>>> First of all many thanks for working on this!
>>>>
>>>> I see that this is against linux-sunxi/u-boot-sunxi.git, that is not
>>>> (really) being actively developed anymore, see:
>>>>
>>>>
>>>> https://www.marshut.net/kuispp/linux-sunxi-u-boot-sunxi-is-no-longer-supported-time-to-switch-to-upstream-u-boot.html
>>>>
>>>> Can you please rebase on top of upstream u-boot, on top of the next
>>>> branch:
>>>> http://git.denx.de/?p=u-boot/u-boot-sunxi.git;a=shortlog;h=refs/heads/next
>>>> ?
>
> I'll certainly do. In fact, it's done, but not tested yet.
>>>>
>>>> Your patches all seem to only have a subject and not a proper commit
>>>> message,
>>>> please add a commit message to all of them describing the changes in
>>>> somewhat
>>>> more detail then you do in the subject, you could e.g. re-use bits of your
>>>> coverletter. Also for upstream u-boot we require a Signed-off-by as part
>>>> of the
>>>> commit message, so please add a line like this one to all your commit
>>>> messages:
>>>>
>>>> Signed-off-by: Daniel Kochma?ski <dkoch...@antmicro.com <javascript:>>
>>>>
>>>> You can make git do this automatically by specifying the -s option when
>>>> committing,
>>>> also please send further versions of this patch-set to the upstream u-boot
>>>> list.
>
> Ok, thanks for the tip.
>>>>
>>>> Besides all the above, which is easily fixed, unfortunately we also have
>>>> the problem
>>>> (or luxury) that Yassin Jaffer (added to the CC) has also been working on
>>>> nand support,
>>>> re-using the upstream kernel code Boris Brezillon has been working on,
>>>> see:
>>>>
>>>> https://github.com/yassinjaffer/u-boot/commits/sunxi-nand
>
> I wasn't aware of his work untill now. I'll give a closer look to it.

Great, I'm looking forward to seeing a new patchs-series from you, adding nand
support to u-boot would be great.

Regards,

Hans