On Tue, Mar 10, 2026 at 09:29:26PM +0000, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> 
> On platforms with multiple xSPI instances, the driver fails to probe
> additional instances due to duplicate sysfs entries:
> 
>   [   86.878242] sysfs: cannot create duplicate filename '/bus/platform/devices/rpc-if-spi'
> 
> This occurs because platform_device_alloc() uses pdev->id for the device
> ID, which may be PLATFORM_DEVID_NONE (-1) for multiple instances, causing
> all instances to attempt registration with the same name.
> 
> Fix this by using PLATFORM_DEVID_AUTO instead, which automatically assigns
> unique IDs to each device instance, allowing multiple xSPI controllers to
> coexist without naming conflicts.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Sounds reasonable to me.

Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>