On Mon, May 15, 2017 at 04:41:38PM -0500, Rob Herring wrote: > On Fri, May 12, 2017 at 03:22:25PM +0200, Romain Perier wrote: > > This commit adds a compatible string for everest,es8323. This is an > > audio codec that is compatible with es8328 and can be found for example > > on the Firefly-RK3288 board. > If it is compatible with the es8328, then that should be a fallback and > you don't need the driver change. While people don't strictly need the driver change it doesn't do any harm either and encourages people to get the information into the DT that it's a different chip. Thinking about it it might be good to have a way for something to validate if fallback compatibles are being listed when they should - the drivers could provide the information fairly easily I guess, or it could go into the binding docs once we have a schema format. Even if it doesn't currently make a difference to software I'd rather get the information in there for mixed signal devices like audio CODECs - it's not that unknown to find later that supposedly register identical chips have some differences in the analog which we want to care about.
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