[PATCH 00/45] AT91, at91sam9x5ek updates

[Andrey Smirnov]

On Tue, Mar 7, 2017 at 12:58 PM, Sam Ravnborg <sam at ravnborg.org> wrote:
>> >
>> > When booting from an SD-Card/NOR-Flash/USB would I then need
>> > to use at91bootstrap, or can I use only barebox?
>> >
>> > If I move forward with this and I can find an 9263
>> > evaluation kit I would then also update this.
>> On 9263 the sram is huge so you can build barebox as first stage
>
> Good - simplicity is good.
>

For  at91sam9x5ek I had to use at91bootstrap since there is first
stage loader in Barebox for it. I don't know about 9263, but I trust
Jean-Christophe to be correct on this one.

>>
>> I add this a long time ago on usb_a9263_bootstrap_defconfig
>> or other (all the EK).
>>
>> This will build a barebox that can load you image from multiple source in a sequence
>>
>> and then use a std barebox
>>
>> To switch to DT you will have to import the DT I did for the kernel
> OK, should be straighforward.
>
>> and replace the hw i2c by a i2c gpio as the i2c IP on at91 has a lot of quirks
>> and for barebox it will not make sense to port it
> Seems less straightforward but doable.
>

Not sure what the situation on 9263 is, but FWIW, kernel DT file from
the kernel for 9x5ek secifies I2C0 as GPIO bitbanged on, and I believe
I had it working so hopefully it would be just a DT related change
that you'd need to do.

Thanks,
Andrey Smirnov