Re: [RFC PATCH 2/2] kselftest: Add Devicetree unprobed devices test

Nícolas F. R. A. Prado
2023-08-11T14:17:20Z

On Fri, Aug 11, 2023 at 02:54:56PM +0100, Mark Brown wrote:
> On Thu, Aug 10, 2023 at 04:23:51PM -0400, Nícolas F. R. A. Prado wrote:
> > Introduce a new kselftest to detect devices that were declared in the
> > Devicetree, and are expected to be probed by a driver, but weren't.
> >
> > The test uses two lists: a list of compatibles that can match a
> > Devicetree device to a driver, and a list of compatibles that should be
> > ignored. The first is automatically generated from a script that parses
> > the kernel source using Coccinelle, and will be run as part of building
> > this test, therefore Coccinelle is a build-time dependency for this
> > test. The list of compatibles to ignore is a hand-crafted list to
> > capture the few exceptions of compatibles that are expected to match a
> > driver but not be bound to it.
>
> This doesn't appear to produce KTAP output which is going to make it
> less useful for generic kselftest runners.

Right, I'm going to need to rewrite it in C for that, but since I already had
the shell script done, I decided to send it as is for the RFC, since I wanted to
get feedback on the general approach more than anything.

Thanks,
Nícolas