linux-kernel - [PATCH] Driver: Adding helper macro for platform

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Message-Id: <20200509100716.11044-1-harshalchau04@gmail.com>
Date:   Sat,  9 May 2020 15:37:16 +0530
From:   Harshal Chaudhari <harshalchau04@...il.com>
To:     derek.kiernan@...inx.com, dragan.cvetic@...inx.com, arnd@...db.de,
        gregkh@...uxfoundation.org, michal.simek@...inx.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        harshalchau04@...il.com
Subject: [PATCH] Driver: Adding helper macro for platform_driver boilerplate.

From: Harshal <harshalchau04@...il.com>

For simple module that contain a single platform_driver without any additional setup code then ends up being a block
of duplicated boilerplate.

This patch add a new micro, module_platform_driver(), which replace the module_init()/module_exit() registrations
with template functions.

Signed-off-by: harshal chaudhari <harshalchau04@...il.com>
---
 drivers/misc/xilinx_sdfec.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c
index 71bbaa56bdb5..db16a42c66f4 100644
--- a/drivers/misc/xilinx_sdfec.c
+++ b/drivers/misc/xilinx_sdfec.c
@@ -1484,25 +1484,7 @@ static struct platform_driver xsdfec_driver = {
 	.remove =  xsdfec_remove,
 };
 
-static int __init xsdfec_init(void)
-{
-	int err;
-
-	err = platform_driver_register(&xsdfec_driver);
-	if (err < 0) {
-		pr_err("%s Unabled to register SDFEC driver", __func__);
-		return err;
-	}
-	return 0;
-}
-
-static void __exit xsdfec_exit(void)
-{
-	platform_driver_unregister(&xsdfec_driver);
-}
-
-module_init(xsdfec_init);
-module_exit(xsdfec_exit);
+module_platform_driver(xsdfec_driver);
 
 MODULE_AUTHOR("Xilinx, Inc");
 MODULE_DESCRIPTION("Xilinx SD-FEC16 Driver");
-- 
2.17.1