[PATCH 4/4] iio: auxadc: mediatek: change to subsys_initcall

[Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx>]

  Move auxadc platform_driver_register() from module_init
to subsys_initcall because auxadc user drivers
are all moudle drivers, need to gurantee
auxadc driver ready before module_init.

Signed-off-by: Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx>
---
 drivers/iio/adc/mt6577_auxadc.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 58d7cb2..cb8e3dd 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -350,7 +350,19 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
 	.probe	= mt6577_auxadc_probe,
 	.remove	= mt6577_auxadc_remove,
 };
-module_platform_driver(mt6577_auxadc_driver);
+
+static int __init mt6577_auxadc_init(void)
+{
+	return platform_driver_register(&mt6577_auxadc_driver);
+}
+
+static void __exit mt6577_auxadc_exit(void)
+{
+	platform_driver_unregister(&mt6577_auxadc_driver);
+}
+
+subsys_initcall(mt6577_auxadc_init);
+module_exit(mt6577_auxadc_exit);
 
 MODULE_AUTHOR("Zhiyong Tao <zhiyong.tao@xxxxxxxxxxxx>");
 MODULE_DESCRIPTION("MTK AUXADC Device Driver");
-- 
1.9.1