#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
#endif
#ifdef CONFIG_8xx
-/* Set default values for the I2C bus speed and slave address on 8xx. In the
+/* Set default value for the I2C bus speed on 8xx. In the
* future, we'll define these in all 8xx board config files.
*/
#ifndef CONFIG_SYS_I2C_SPEED
#define CONFIG_SYS_I2C_SPEED 50000
#endif
+#endif
+/*
+ * Many boards/controllers/drivers don't support an I2C slave interface so
+ * provide a default slave address for them for use in common code. A real
+ * value for CONFIG_SYS_I2C_SLAVE should be defined for any board which does
+ * support a slave interface.
+ */
#ifndef CONFIG_SYS_I2C_SLAVE
-#define CONFIG_SYS_I2C_SLAVE 0xFE
-#endif
+#define CONFIG_SYS_I2C_SLAVE 0xfe
#endif
/*