On 15.07.20 21:06, Geert Uytterhoeven wrote:
On Mon, Jul 13, 2020 at 5:11 PM Mark Brown <broonie@xxxxxxxxxx> wrote:
On Mon, Jul 13, 2020 at 03:19:52PM +0200, Frieder Schrempf wrote:
I would have expected that there is some kind of existing userspace API to
load an overlay manually, but it seems like there isn't!?
So what's the reasoning behind this? How can I solve this in a
mainline-compliant way, meaning without either keeping downstream patches to
bind spidev to my device or writing and maintaining code that does the
overlay loading?
Basically the reasoning is that nobody's done it rather than any grand
Nah, it's been done, but a bit unsafe, if you don't know what you're doing
("with great power come great responsibilities").
Please check out https://elinux.org/R-Car/DT-Overlays
I do my best to keep topic/overlays branch up-to-date, and working.
Thanks! That looks like what I was searching for, but couldn't find it.
So there's some work being done. That's good to know. We probably can't
use it in this state, but that's still a lot better than nothing.
design not to do it. There's some issues for more complex connectors
present on multiple boards with mapping the same connector onto multiple
boards where a resource on the connector might be provided by different
things on the base board so it's not quite as trivial for them as it
should be.
There's a big list of issues at
https://elinux.org/Frank%27s_Evolving_Overlay_Thoughts
In other words: more work to be done, to polish it, and make it safe(r).
I'm now getting a rough idea about the efforts and issues behind this,
thanks.
