Re: [PATCH] regmap: prevent noinc writes from clobbering cache

[Mark Brown]

On Wed, Nov 01, 2023 at 04:20:08PM -0400, Ben Wolsieffer wrote:
> On Wed, Nov 01, 2023 at 05:05:39PM +0000, Mark Brown wrote:

> > Could you please add a kunit test for this?

> I started to look into this, but it is not currently possible to test
> noinc behavior with regmap_[raw_]ram. The same bulk write operation is
> used by both incrementing and non-incrementing writes, and the difference
> in behavior is due to how the hardware handles the bulk write to a
> particular register.

> To test this behavior, regmap_raw_ram (raw because it supports bulk
> writes) would have to be told that certain of its registers should
> implement noinc semantics.

> Is this something I should implement?

That would be great, yes - I've just been implementing features in those
map types on an as needed basis as I've been writing tests and I didn't
get round to covering noinc yet.

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