regulator: wm831x-dcdc: Use platform_register/unregister_drivers()

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@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 8cbb82ceec40521a7486b4f89b03e1c42499c041..05f69d1ede19a887a6324f7f78d9ecad33c42c03 100644 (file)
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -884,35 +884,22 @@ static struct platform_driver wm831x_epe_driver = {
        },
 };
 
+static struct platform_driver * const drivers[] = {
+       &wm831x_buckv_driver,
+       &wm831x_buckp_driver,
+       &wm831x_boostp_driver,
+       &wm831x_epe_driver,
+};
+
 static int __init wm831x_dcdc_init(void)
 {
-       int ret;
-       ret = platform_driver_register(&wm831x_buckv_driver);
-       if (ret != 0)
-               pr_err("Failed to register WM831x BUCKV driver: %d\n", ret);
-
-       ret = platform_driver_register(&wm831x_buckp_driver);
-       if (ret != 0)
-               pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
-
-       ret = platform_driver_register(&wm831x_boostp_driver);
-       if (ret != 0)
-               pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
-
-       ret = platform_driver_register(&wm831x_epe_driver);
-       if (ret != 0)
-               pr_err("Failed to register WM831x EPE driver: %d\n", ret);
-
-       return 0;
+       return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 }
 subsys_initcall(wm831x_dcdc_init);
 
 static void __exit wm831x_dcdc_exit(void)
 {
-       platform_driver_unregister(&wm831x_epe_driver);
-       platform_driver_unregister(&wm831x_boostp_driver);
-       platform_driver_unregister(&wm831x_buckp_driver);
-       platform_driver_unregister(&wm831x_buckv_driver);
+       platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 }
 module_exit(wm831x_dcdc_exit);