Messages in this thread Patch in this message | | | From | Quentin Schulz <> | Subject | [PATCH v4 1/3] hwmon: iio_hwmon: delay probing with late_initcall | Date | Thu, 1 Sep 2016 16:05:03 +0200 |
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iio_channel_get_all returns -ENODEV when it cannot find either phandles and properties in the Device Tree or channels whose consumer_dev_name matches iio_hwmon in iio_map_list. The iio_map_list is filled in by iio drivers which might be probed after iio_hwmon.
This makes sure iio_hwmon is probed after all iio drivers which provides channels to iio_hwmon are probed, be they present in the DT or using iio_map_list.
This replaces module_platform_driver() by an explicit code variant which calls late_initcall() install of module_init(), meaning it probes after all the drivers using module_init() as their init.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com> ---
v4: - use platform_driver_register instead of platform_register_drivers,
v3: - use late_initcall instead of deferring probe,
drivers/hwmon/iio_hwmon.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c index b550ba5..c509779 100644 --- a/drivers/hwmon/iio_hwmon.c +++ b/drivers/hwmon/iio_hwmon.c @@ -192,7 +192,17 @@ static struct platform_driver __refdata iio_hwmon_driver = { .remove = iio_hwmon_remove, }; -module_platform_driver(iio_hwmon_driver); +static int __init iio_hwmon_late_init(void) +{ + return platform_driver_register(&iio_hwmon_driver); +} +late_initcall(iio_hwmon_late_init); + +static void __exit iio_hwmon_exit(void) +{ + platform_driver_unregister(&iio_hwmon_driver); +} +module_exit(iio_hwmon_exit); MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>"); MODULE_DESCRIPTION("IIO to hwmon driver"); -- 2.5.0
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