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Linux/AM5728: I2C driver tell me something strange,that confused me.

Part Number: AM5728


Tool/software: Linux

Hi,

    I have finished customer devcie driver(it's a temperture sensor,owns I2C interface),but when I insmod sensor.ko into kernel;"kernel" said "cpu cpu0:vdd failed for 1060000uV[min 850000uV max 1500000uV];" and "cpu freq:_target_index:Failed to change cpu frequency:-16" repeatly in a few times;that confused me,and what's the reason cause the problem?any available suggestions will be appreciated.Note:my device driver works well.