[U-Boot] [PATCH] serial: 16550: Add JZ47xx support

[Marek Vasut <marex@denx.de>]

On 05/26/2016 03:55 PM, Paul Burton wrote:
> On Thu, May 26, 2016 at 02:05:07PM +0200, Marek Vasut wrote:
>>> Interesting :) May I ask which platform/SoC you're working with? Have
>>> you seen the (unfortunately currently out of tree) port we did for the
>>> JZ4780-based Ci20? I recall the pain of squeezing SPL down to a small
>>> enough size well...
>>
>> I bought the CI20, yeah. I started with that tree and am now getting it
>> into mainline shape. I actually managed to optimize the SPL, so it does
>> not overflow. One of the things which helped a lot was removing slop[1]
>> from the structures and using appropriate data types in them (like don't
>> use u32 to store an 8bit number). I also tinified the MMC stack, so that
>> it won't pull in too much useless code.
>>
>> At this point, I have a u-boot running from SD card and the SD driver in
>> full U-Boot is already probing from DT and using DM. I sent Daniel the
>> updated patches, but they are still work in progress. Nonetheless, if
>> you want me forward that to you as well, let me know.
>>
>> I plan to get this CI20 submitted at some point this or next week, so it
>> can land in 2016.07 (I hope!) and then debian and fedora-mips (and other
>> distros) can pick it up and package proper. That's how I see it.
> 
> That sounds great :) I'd be interested in seeing them but probably won't
> have any time to look at them for a few weeks anyway (busy with other
> work things & then getting married & going off on honeymoon!). So
> hopefully by the time I'd get round to having a look they'll be in
> mainline :)

Congratulations ! I sent you a separate mail and I'm going to submit
some of the stuff now too.

>> btw. what is the linux support status of the ci20 ? Is anyone working
>> on that? I saw the DTS in Linux, but it's pretty bare-bones.
> 
> Yeah the support in mainline Linux is a bit basic at the moment. The
> biggest holdup is pinctrl support which I need to do some work on - the
> DT bindings are more complicated than they need to be, and the driver
> should probably be made more generic to cover other Ingenic SoCs before
> it goes into mainline.

I wonder if I should drill into that now ;-)

>> btw2. can I get the ci40 anywhere or is that just unobtainium board ?
> 
> I'll email you separately about that.
> 
> Thanks,
>     Paul
> 


-- 
Best regards,
Marek Vasut