linux-kernel - [PATCH 3/3] regulator: wm831x-ldo: Use platform_register/unregister

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Message-Id: <1449073973-12863-3-git-send-email-thierry.reding@gmail.com>
Date:	Wed,  2 Dec 2015 17:32:53 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] regulator: wm831x-ldo: Use platform_register/unregister_drivers()

From: Thierry Reding <treding@...dia.com>

These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Signed-off-by: Thierry Reding <treding@...dia.com>
---
 drivers/regulator/wm831x-ldo.c | 27 ++++++++-------------------
 1 file changed, 8 insertions(+), 19 deletions(-)

diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c
index 5a7b65e8a529..9ad2a29617e2 100644
--- a/drivers/regulator/wm831x-ldo.c
+++ b/drivers/regulator/wm831x-ldo.c
@@ -653,32 +653,21 @@ static struct platform_driver wm831x_alive_ldo_driver = {
 	},
 };
 
+static struct platform_driver * const drivers[] = {
+	&wm831x_gp_ldo_driver,
+	&wm831x_aldo_driver,
+	&wm831x_alive_ldo_driver,
+};
+
 static int __init wm831x_ldo_init(void)
 {
-	int ret;
-
-	ret = platform_driver_register(&wm831x_gp_ldo_driver);
-	if (ret != 0)
-		pr_err("Failed to register WM831x GP LDO driver: %d\n", ret);
-
-	ret = platform_driver_register(&wm831x_aldo_driver);
-	if (ret != 0)
-		pr_err("Failed to register WM831x ALDO driver: %d\n", ret);
-
-	ret = platform_driver_register(&wm831x_alive_ldo_driver);
-	if (ret != 0)
-		pr_err("Failed to register WM831x alive LDO driver: %d\n",
-		       ret);
-
-	return 0;
+	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 }
 subsys_initcall(wm831x_ldo_init);
 
 static void __exit wm831x_ldo_exit(void)
 {
-	platform_driver_unregister(&wm831x_alive_ldo_driver);
-	platform_driver_unregister(&wm831x_aldo_driver);
-	platform_driver_unregister(&wm831x_gp_ldo_driver);
+	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 }
 module_exit(wm831x_ldo_exit);
 
-- 
2.5.0

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