RTC problem

[bianchina3]

Hello.

I can not read and write the registers of the real time clock (PCF8563):

olinuxino1 root @: ~ # hwclock
hwclock: ioctl (RTC_RD_TIME) to / dev/rtc0 to read the time failed: Input / output error


in /var/log/syslog:
Dec 6 22:17:54 olinuxino1 kernel: [1343.050000] incomplete xfer (0x20)
Dec 6 22:17:54 olinuxino1 kernel: [1343.050000] pcf8563 1-0051: pcf8563_get_datetime: read error, ret: -70

the kernel is:
Linux olinuxino1 3.4.19 #7 PREEMPT Thu Dec 6 21:54:47 CET 2012 armv7l GNU/Linux


The same thing happens to you?