extcon: Export OF module alias information in missing drivers

The I2C core always reports the MODALIAS uevent as "i2c:<modalias>"
regardless of the mechanism that was used to register the device
(i.e: OF or board code) and the table that is used later to match
the driver with the device (i.e: I2C id table or OF match table).

So drivers needs to export the I2C id table and this be built into
the module or udev won't have the necessary information to autoload
the needed driver module when the device is added.

But this means that OF-only drivers needs to have both OF and I2C id
tables that have to be kept in sync and also the dev node compatible
manufacturer prefix is stripped when reporting the MODALIAS. Which can
lead to issues if two vendors use the same I2C device name for example.

To avoid the above, the I2C core behavior may be changed in the future
to not require an SPI device table for OF-only drivers and report the
OF module alias. So, it's better to also export the OF table even when
is unused now to prevent breaking module loading when the core changes.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
index 11592e980bc18f2885d91b61720b2b24e943aa0e..3428b6aae1a2382f7e1d41837829e83b00358c0d 100644 (file)
--- a/drivers/extcon/extcon-rt8973a.c
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -658,6 +658,7 @@ static const struct of_device_id rt8973a_dt_match[] = {
        { .compatible = "richtek,rt8973a-muic" },
        { },
 };
+MODULE_DEVICE_TABLE(of, rt8973a_dt_match);
 
 #ifdef CONFIG_PM_SLEEP
 static int rt8973a_muic_suspend(struct device *dev)

diff --git a/drivers/extcon/extcon-sm5502.c b/drivers/extcon/extcon-sm5502.c
index 0ffefefa2e260ac9f9a12794befc84b3d1a14d18..92ae48415fb2671c14ff5b002565d209f19a1dea 100644 (file)
--- a/drivers/extcon/extcon-sm5502.c
+++ b/drivers/extcon/extcon-sm5502.c
@@ -650,6 +650,7 @@ static const struct of_device_id sm5502_dt_match[] = {
        { .compatible = "siliconmitus,sm5502-muic" },
        { },
 };
+MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 
 #ifdef CONFIG_PM_SLEEP
 static int sm5502_muic_suspend(struct device *dev)