[Letux-kernel] [RFC 00/28] Add support for Ingenic JZ4730

[H. Nikolaus Schaller]

Hi Paul,

> Am 24.01.2021 um 17:27 schrieb Paul Boddie <paul at boddie.org.uk>:
> 
> On Saturday, 23 January 2021 18:30:01 CET Paul Boddie wrote:
>> On Saturday, 23 January 2021 17:35:01 CET H. Nikolaus Schaller wrote:
>>> 
>>> https://git.goldelico.com/?p=letux-kernel.git;a=shortlog;h=refs/heads/
> letux/jz4730-v6
>> 
>> I will try and pull this and compile, maybe even try it out. :-)
> 
> I checked this out, but there wasn't a configuration file for the Letux 400. 
> So, I checked out and compiled letux-5.11-rc4+jz4730 instead using the 
> letux_mipsbook_defconfig, but this didn't boot, or not with any visible signs 
> of progress on the screen.

Hm. It may still be a wip version where the LCDC is not complete.

> 
> What did I do wrong? :-)

Just wait a day :)

Tomorrow, I'll update to -rc5 and then the letux-current branch should work.

The jz4730-v6 branch will also be replaced by -v7 and have all needed jz4730
additions, including the one by Paul Cercuil.

But yes, there is no defconfig because that is only the pure jz4730 SoC support.

At the moment the L400 definitions are spread over several letux/ branches.
One for device tree, one for the power controller mcu and one for defconfig.

This is good for development but not that good for upstreaming...

I plan to have a separate series for the full device (a little smaller) and both
need to be merged finally. I think we should even POST them separately because
they affect completely different files and subsystems. Hence there will be
different maintainers involved.

There, I plan to add an alpha400_defconfig (separate from the letux_defconfig)
with only the bare minimum of necessary components and none defined as =m.
This should build and boot a lot quicker for such a small machine :)

But before all this we need to fix
* dma
* i2s (clocks)
* i2c
* sound

What we can leave for later work is Ethernet since we have WiFi working.

BR,
Nikolaus