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/mailbox/mailbox-sti.ko | grep alias alias: platform:mailbox-sti After this patch: $ modinfo drivers/mailbox/mailbox-sti.ko | grep alias alias: platform:mailbox-sti alias: of:N*T*Cst,stih407-mailboxC* alias: of:N*T*Cst,stih407-mailbox Signed-off-by: Javier Martinez Canillas <jav...@osg.samsung.com> --- drivers/mailbox/mailbox-sti.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mailbox/mailbox-sti.c b/drivers/mailbox/mailbox-sti.c index a334db5c9f1c..41bcd339b68a 100644 --- a/drivers/mailbox/mailbox-sti.c +++ b/drivers/mailbox/mailbox-sti.c @@ -403,6 +403,7 @@ static const struct of_device_id sti_mailbox_match[] = { }, { } }; +MODULE_DEVICE_TABLE(of, sti_mailbox_match); static int sti_mbox_probe(struct platform_device *pdev) { -- 2.7.4