Thread (38 messages) 38 messages, 5 authors, 2021-01-22

Re: [PATCH V5 5/5] of: unittest: Statically apply overlays using fdtoverlay

From: David Gibson <hidden>
Date: 2021-01-21 06:45:12
Also in: lkml

On Thu, Jan 21, 2021 at 11:20:40AM +0530, Viresh Kumar wrote:
On 20-01-21, 23:45, Frank Rowand wrote:
quoted
I have only the most surface knowledge of fdtoverlay, mostly from
"fdtoverlay --help", but you can apply multiple overlays with a
single invocation of fdtoverlay.  My _assumption_ was that the
overlays would be applied in order, and after any given overlay
was applied, subsequent overlays could reference the previously
applied overlay.

Is my assumption incorrect?
I think yes, if everything is in order then it should work just fine.

I was only suggesting that fdtoverlay accepting the base overlay with
/plugin/; may well be a requirement and so intentionally done.
No.  It's simply the result of the fact that a dtbo is still a dtb.
So, you can still apply an overlay to it.  However, a dtbo is a
weirdly structured dtb, so applying an overlay to it is very unlikely
to give you something useful.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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