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Subject[PATCH 2/3] regulator: wm831x-dcdc: Use platform_register/unregister_drivers()
Date
From: Thierry Reding <treding@nvidia.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@nvidia.com>
---
drivers/regulator/wm831x-dcdc.c | 31 +++++++++----------------------
1 file changed, 9 insertions(+), 22 deletions(-)

diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 8cbb82ceec40..05f69d1ede19 100644
--- 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);

--
2.5.0


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