The driver has a platform device ID table with multiple device entries,
each setting a different register address in its driver_data to control
the WLED brightness.
But the driver doesn't export these as aliases with MODULE_DEVICE_TABLE()
when the driver is built as a module, instead it just has a single alias
using MODULE_ALIAS("platform:da9052-backlight"). That is clearly wrong
since there isn't a "da9052-backlight" in the platform device ID table,
so if that device name is used, the device won't even match the driver.
So instead of having a wrong alias, export the ones in the dev ID table.
Before this patch:
$ modinfo drivers/video/backlight/da9052_bl.ko | grep alias
alias: platform:da9052-backlight
After this patch:
$ modinfo drivers/video/backlight/da9052_bl.ko | grep alias
alias: platform:da9052-wled3
alias: platform:da9052-wled2
alias: platform:da9052-wled1
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>
---
drivers/video/backlight/da9052_bl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/backlight/da9052_bl.c b/drivers/video/backlight/da9052_bl.c
index fd2be417aa64..49035c12739a 100644
--- a/drivers/video/backlight/da9052_bl.c
+++ b/drivers/video/backlight/da9052_bl.c
@@ -167,6 +167,7 @@ static const struct platform_device_id da9052_wled_ids[] = {
},
{ },
};
+MODULE_DEVICE_TABLE(platform, da9052_wled_ids);
static struct platform_driver da9052_wled_driver = {
.probe = da9052_backlight_probe,
@@ -182,4 +183,3 @@ module_platform_driver(da9052_wled_driver);
MODULE_AUTHOR("David Dajun Chen <dchen@xxxxxxxxxxx>");
MODULE_DESCRIPTION("Backlight driver for DA9052 PMIC");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:da9052-backlight");
--
2.7.4
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