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