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