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

Michael Walle michael at walle.cc
Fri Dec 2 05:50:54 PST 2022

Am 2022-12-02 14:37, schrieb Geert Uytterhoeven:
> Document support for the Micron MT25QU256A and MT25QU512A Serial NOR
> FLASHes.
> Merge the new entries with the existing entry for MT25QU02G.
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
> mt25qu512a is already in active use, causing "make dtbs_check" errors.
> mt25qu256a is supported by the Linux spi-nor driver, but there are no
> upstream users yet.

Is it encouraged to use the specific compatible with SPI-NOR flashes?
As far as I know it isn't. The spi-nor subsys tries hard to identify
any flashes at runtime and any additional information in the device tree
is used as a last resort (just for flashes which doesn't support the
read jedec id command yet). And usually boards have different sources
for flash chips, so hardcoding a particular part in the device tree
doesn't make sense.

just my 2 cents,

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