#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
#if defined(CONFIG_I2C_MULTI_BUS)
+#if !defined(CONFIG_SYS_MAX_I2C_BUS)
#define CONFIG_SYS_MAX_I2C_BUS 2
+#endif
#define I2C_GET_BUS() i2c_get_bus_num()
#define I2C_SET_BUS(a) i2c_set_bus_num(a)
#else