rtc: class: add debug message when registration fails

Add a message when __rtc_register_device fails because rtc->ops is NULL.
This may only happen when developing a new driver so use dev_dbg to avoid
compiling it in by default.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20190818220041.17833-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 0f492b0..9458e6d 100644 (file)
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -346,8 +346,10 @@ int __rtc_register_device(struct module *owner, struct rtc_device *rtc)
        struct rtc_wkalrm alrm;
        int err;
 
-       if (!rtc->ops)
+       if (!rtc->ops) {
+               dev_dbg(&rtc->dev, "no ops set\n");
                return -EINVAL;
+       }
 
        rtc->owner = owner;
        rtc_device_get_offset(rtc);