[PATCH 1/2] rtc: class: add debug message when registration fails

[Alexandre Belloni]

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.bell...@bootlin.com>
---
 drivers/rtc/class.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 0f492b0940b3..9458e6d6686a 100644
--- 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);
-- 
2.21.0