Re: [PATCH v4 0/20] MMP platform fixes

[Lubomir Rintel]

On Fri, 2018-11-30 at 15:44 -0800, Olof Johansson wrote:
> Hi,
> 
> On Wed, Nov 28, 2018 at 10:39:06PM +0100, Arnd Bergmann wrote:
> > On Wed, Nov 28, 2018 at 6:53 PM Lubomir Rintel <lkundrak@xxxxx> wrote:
> > > Hi,
> > > 
> > > this series contains contains a bunch of MMP2 platform fixes.
> > > 
> > > Previous spins of the patch set were sent out over the course of last
> > > three months to the MMP platform maintainers, with Arnd and
> > > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx on copy.
> > > 
> > > Unfortunatelly, MMP maintainers (Eric Miao and Haojian Zhuang) don't
> > > seem to respond anymore. That's a shame, because the MMP2 support seems to
> > > in need for some love. The DT/multiplatform kernels can't even boot without
> > > 14/20, 15/20 and perhaps more.
> > > 
> > > I'm wondering if this cat gen in via the arm-soc tree? Would it be
> > > appropriate if I followed up with a MAINTAINERS update in that case?
> > 
> > Yes, sounds good to me. I looked through the series again, and
> > found one patch that seems wrong to me. Everything else should
> > just go in.
> 
> I've applied the DT patches and the ones that touch only arch/arm/mach-*.
> There are a few driver patches here that should be reviewed/acked by the
> corresponding maintainers as well, so I didn't apply most of them yet.

Thank you.

> > > The patch set has been tested on an OLPC XO-1.75 laptop.
> > 
> > Excellent!
> 
> OOooh, I have one of those... somewhere.

I'm working on adjusting the machine's OFW to provide a devicetree that
matches what mainline Linux expects. I'll follow up with a boot script
in a few days -- once it's good enough to be actually useful.

There also seems to be a good chance that we'll get an updated firmware
image at some point.

Until then, CONFIG_ARM_APPENDED_DTB can be used, though a zImage header
needs to be modified to account for the DTB at the end:

https://github.com/hackerspace/olpc-xo175-linux/wiki/How-to-run-an-up-to-date-Linux-on-a-XO-1.75

> -Olof

Lubo