TIM_CFG_MODE_400_SHIFT
val &= ~BIT(TIM_CFG_MODE_400_SHIFT);
val |= (bus_speed == I2C_MAX_FAST_MODE_FREQ) << TIM_CFG_MODE_400_SHIFT;
val &= ~BIT(TIM_CFG_MODE_400_SHIFT);
val |= (iproc_i2c->bus_speed == I2C_MAX_FAST_MODE_FREQ) << TIM_CFG_MODE_400_SHIFT;