linux-kernel - [PATCH 4/4] iio: auxadc: mediatek: change to subsys

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Message-ID: <1557994247-16739-5-git-send-email-chun-hung.wu@mediatek.com>
Date:   Thu, 16 May 2019 16:10:47 +0800
From:   Chun-Hung Wu <chun-hung.wu@...iatek.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <wsd_upstream@...iatek.com>,
        <peter.wang@...iatek.com>, <kuohong.wang@...iatek.com>,
        <jg_poxu@...iatek.com>, Chun-Hung Wu <chun-hung.wu@...iatek.com>
Subject: [PATCH 4/4] iio: auxadc: mediatek: change to subsys_initcall

  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@...iatek.com>
---
 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@...iatek.com>");
 MODULE_DESCRIPTION("MTK AUXADC Device Driver");
-- 
1.9.1