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TI8148 I2C[3] problem

Hi ALL,

             In our board,we use I2C[3] for image sensor and I2C[0] for other I2C devices.I2C[0] works well,but it seems we have trouble with initializing the I2C[3] bus,we even can not capture any waveform with scope on I2C[3].In technical manual,we see below:

CM_ALWON_I2C_0_CLKCTRL & CM_ALWON_I2C_1_CLKCTRL

but we found nothing about clock infomation of I2C[2],I2C[3],any ideas?

Thanks and Best Regards,

XiangW