[PATCH v4 14/34] drm/exynos: hdmi: remove the i2c drivers and use devtree (original) (raw)

Olof Johansson olof at lixom.net
Tue Feb 11 15:02:17 PST 2014

On Fri, Feb 7, 2014 at 6:52 PM, Tomasz Figa <tomasz.figa at gmail.com> wrote:

Adding new required properties to an already defined binding is breaking backwards compatibility, which is supposed to be preserved, since DT is an ABI.

Now, I'm not really a big fan of DT stability, but if we decide to maintain it for other Exynos drivers as well (e.g. USB), then we probably should do the same here...

A binding without users can be changed. If you're sure that there are no users of the old binding, and that any users can and will (without complaint or surprise) update to a newer DT with the newer binding, then you can change it. I'm not sure if the cat is out of the bag w.r.t. users of upstream Exynos kernels that this is true or not.

-Olof

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