From ff612f9170eaa9ca7ade357b270f582b0c44ed70 Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Tue, 25 Aug 2015 08:31:15 +0200 Subject: [PATCH] extcon: Export OF module alias information in missing drivers The I2C core always reports the MODALIAS uevent as "i2c:" 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 Signed-off-by: Chanwoo Choi --- drivers/extcon/extcon-rt8973a.c | 1 + drivers/extcon/extcon-sm5502.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c index 11592e980bc1..3428b6aae1a2 100644 --- 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 0ffefefa2e26..92ae48415fb2 100644 --- 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) -- 2.20.1