hi,all
In our custom board(dm8168)，we use a external rtc chip which name is sd2503. It use i2c interface to communication.
I add a new sd2503.c file in drivers/rtc/.
I implement : probe, exit, get time, set time function .
I add a item to kconfig file in drivers/rtc/
config RTC_DRV_SD2503
tristate "sd-sd2503/NB"
help
If you say yes here you get support for the
sd-sd2503/NB RTC chips.
This driver can also be built as a module. If so, the module
will be called rtc-sd2503
In kernel log, I can see following message，and I am sure the communication is ok between sd2503 and 8168.
In sd2503_probe
before sd2503_init_client =================
=====0x84,0x80
Write access has been enabled======
rtc-sd2503 1-0032: Write access has been enabled
rtc-sd2503 1-0032: rtc core: registered sd2503 as rtc0
rtc-sd2503 1-0032: 70 bytes nvram
but .....
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
I follow the code ,and I found it failed in rtc_class_open->class_find_device
any help?I am a beginer of linux driver developer.
