If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module.
Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/net/dsa/b53/b53_mmap.ko | grep alias $ After this patch: $ modinfo drivers/net/dsa/b53/b53_mmap.ko | grep alias alias: of:N*T*Cbrcm,bcm63xx-switchC* alias: of:N*T*Cbrcm,bcm63xx-switch alias: of:N*T*Cbrcm,bcm6368-switchC* alias: of:N*T*Cbrcm,bcm6368-switch alias: of:N*T*Cbrcm,bcm6328-switchC* alias: of:N*T*Cbrcm,bcm6328-switch alias: of:N*T*Cbrcm,bcm3384-switchC* alias: of:N*T*Cbrcm,bcm3384-switch Signed-off-by: Javier Martinez Canillas <jav...@osg.samsung.com> --- drivers/net/dsa/b53/b53_mmap.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/dsa/b53/b53_mmap.c b/drivers/net/dsa/b53/b53_mmap.c index 76fb8552c9d9..ef63d24fef81 100644 --- a/drivers/net/dsa/b53/b53_mmap.c +++ b/drivers/net/dsa/b53/b53_mmap.c @@ -256,6 +256,7 @@ static const struct of_device_id b53_mmap_of_table[] = { { .compatible = "brcm,bcm63xx-switch" }, { /* sentinel */ }, }; +MODULE_DEVICE_TABLE(of, b53_mmap_of_table); static struct platform_driver b53_mmap_driver = { .probe = b53_mmap_probe, -- 2.7.4