[PATCH] dt-bindings: mtd: jedec,spi-nor: Document support for more MT25QU parts

[Michael Walle]

Hi Geert,

>> We won't break compatibility with older DTBs if we use a list of
>> compatibles. First the vendor specific one which will use some quirks,
>> and if that's not available, have as second the generic jedec,spi-nor 
>> to
>> fallback to.
> 
> Sure, you should use a list.
> 
> But the current recommended practice is to not have a list,
> but just "jedec,spi-nor" (using a list with a new FLASH part name
> causes checkpatch and dtbs_check warnings). Hence if you follow that
> recommendation, you will run into compatibility issues with older DTBs
> when you discover the quirk later, and decide to add it to the list.

The SPI NOR flashes should be auto discoverable. Why do you need a
compatible string? Quirks can be added to the flash_info database.

Also note, that one reason *not* to add a particular flash compatible
is that they are usually interchangeable and OEMs do so. So a where
today a board might have a macronix flash, tomorrow that board might
have a gigadevice one for example.

-michael