tqm5200s i2c bus timeout

Johannes Braun jjo.braun at gmail.com
Fri Jan 4 22:30:13 EST 2013

>> The good thing is that I can see all the devices now. Also the driver
>> for the rtc clock is loading. But the time can`t be read through the
>> registered rtc0 device. This is the kernel log. But I think this is a
>> driver issue and I should have a look inside the driver.
>> [    1.483761] rtc-pcf8563 1-0051: chip found, driver version 0.4.3
>> [    1.490382] rtc-pcf8563 1-0051: pcf8563_get_datetime: read error
>> [    1.497478] rtc-pcf8563 1-0051: rtc core: registered rtc-pcf8563 as rtc0
> The RTC slave address is correct. Is the pcf8563 RTC on I2C2 bus on
> your board?

My address was not correct. The rtc clock is on I2C1 bus. I moved the
rtc node to the I2C1 node. The rtc clock works now.


More information about the Linuxppc-dev mailing list