mfd: sta2x11: 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: Lee Jones <lee.jones@linaro.org>

drivers/mfd/sta2x11-mfd.c

@@ -372,12 +372,6 @@ static struct platform_driver sta2x11_sctl_platform_driver = {
 	.probe		= sta2x11_sctl_probe,
 };
 
-static int __init sta2x11_sctl_init(void)
-{
-	pr_info("%s\n", __func__);
-	return platform_driver_register(&sta2x11_sctl_platform_driver);
-}
-
 static struct platform_driver sta2x11_platform_driver = {
 	.driver = {
 		.name	= STA2X11_MFD_APBREG_NAME,
@@ -385,12 +379,6 @@ static struct platform_driver sta2x11_platform_driver = {
 	.probe		= sta2x11_apbreg_probe,
 };
 
-static int __init sta2x11_apbreg_init(void)
-{
-	pr_info("%s\n", __func__);
-	return platform_driver_register(&sta2x11_platform_driver);
-}
-
 static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
 	.driver = {
 		.name	= STA2X11_MFD_APB_SOC_REGS_NAME,
@@ -398,12 +386,6 @@ static struct platform_driver sta2x11_apb_soc_regs_platform_driver = {
 	.probe		= sta2x11_apb_soc_regs_probe,
 };
 
-static int __init sta2x11_apb_soc_regs_init(void)
-{
-	pr_info("%s\n", __func__);
-	return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver);
-}
-
 static struct platform_driver sta2x11_scr_platform_driver = {
 	.driver = {
 		.name = STA2X11_MFD_SCR_NAME,
@@ -411,13 +393,18 @@ static struct platform_driver sta2x11_scr_platform_driver = {
 	.probe = sta2x11_scr_probe,
 };
 
-static int __init sta2x11_scr_init(void)
+static struct platform_driver * const drivers[] = {
+	&sta2x11_platform_driver,
+	&sta2x11_sctl_platform_driver,
+	&sta2x11_apb_soc_regs_platform_driver,
+	&sta2x11_scr_platform_driver,
+};
+
+static int __init sta2x11_drivers_init(void)
 {
-	pr_info("%s\n", __func__);
-	return platform_driver_register(&sta2x11_scr_platform_driver);
+	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 }
 
-
 /*
  * What follows are the PCI devices that host the above pdevs.
  * Each logic block is 4kB and they are all consecutive: we use this info.
@@ -664,10 +651,7 @@ static int __init sta2x11_mfd_init(void)
  * prepares platform drivers very early and probe the PCI device later,
  * but before other PCI devices.
  */
-subsys_initcall(sta2x11_apbreg_init);
-subsys_initcall(sta2x11_sctl_init);
-subsys_initcall(sta2x11_apb_soc_regs_init);
-subsys_initcall(sta2x11_scr_init);
+subsys_initcall(sta2x11_drivers_init);
 rootfs_initcall(sta2x11_mfd_init);
 
 MODULE_LICENSE("GPL v2");