Device tree probe order

[Sascha Hauer]

Hi Renauld,

On Wed, Nov 15, 2023 at 04:47:03PM +0000, Renaud Barbier wrote:
> We have a board based on the LS1026A with a boot SPI NOR on the QSPI
> controller and FRAM on the DSPI controller.  Currently, the DSPI is
> being probed first and got the device node /dev/m25p0. The boot SPI
> get /dev/m25p1.
> 
> I would like the  QSPI NOR to be assigned to /dev/m25p0 and the FRAM
> to /dev/m25p1.
> 
> Is it possible to change the probing order or the device node
> assignment?

You can create aliases in the device tree for both flashes, see
drivers/mtd/devices/m25p80.c:258:

        if (dev->of_node)
                flash_name = of_alias_get(dev->of_node);

Sascha

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