IICB0SLWT
i2c_ctl0 = IICB0SLWT | IICB0SLAC | IICB0IICE;
bit_clrl(priv->base + IICB0CTL0, IICB0SLWT);
bit_setl(priv->base + IICB0CTL0, IICB0SLWT);