THC_M_PRT_SW_SEQ_I2C_WR_CNTRL_THC_PIO_I2C_WBC
i2c_ctrl = FIELD_PREP(THC_M_PRT_SW_SEQ_I2C_WR_CNTRL_THC_PIO_I2C_WBC, write_size);
mask = THC_M_PRT_SW_SEQ_I2C_WR_CNTRL_THC_PIO_I2C_WBC;