RK_PB4
{ 4, RK_PB4, 1, ROUTE_GRF, 0x0300, ROUTE_VAL(14, 1) }, /* I2C2 M1 */
{ 3, RK_PB4, 4, ROUTE_GRF, 0x0304, ROUTE_VAL(4, 0) }, /* I2C5 M0 */
{ 2, RK_PB4, 2, ROUTE_GRF, 0x030c, ROUTE_VAL(8, 0) }, /* UART1 M0 */