[U-Boot-Users] errors in using DS1337

hello,

when I choose to use DS1337, I add definitions in header file:

#define CONFIG_RTC_DS1337 #define CFG_I2C_RTC_ADDR 0x68

but, during making process, error appears:

rtc/librtc.a(ds1337.o): in function 'rtc_read': .../rtc/ds1337.c: 172: undefined reference to 'i2c_reg_read' rtc/librtc.a(ds1337.o): in function 'rtc_write': .../rtc/ds1337.c: 178: undefined reference tp 'i2c_reg_write'

how to solve this error?

thank you.

-lxg