hello all
When driver register rtc_alarm_interface by class_interface_register
(),it wil call below code:
====
if (class_intf->add_dev) {
list_for_each_entry(dev, &parent->devices, node)
class_intf->add_dev(dev, class_intf);
}
====
Then rtc_alarm_add_device() will add at least one device to the
interface.But in rtc_alarm_add_device() driver do device specific
thing such as misc_register().
Though alarm_rtc_dev has value when exit the function the first time,
the latter call will just return -EBUSY ,i think this is not a good
design.
Thanks
Hamody
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