+#if !defined(CONFIG_SYS_RTC_BUS_NUM)
+#define CONFIG_SYS_RTC_BUS_NUM 0
+#endif
+#if !defined(CONFIG_SYS_DTT_BUS_NUM)
+#define CONFIG_SYS_DTT_BUS_NUM 0
+#endif
+#if !defined(CONFIG_SYS_SPD_BUS_NUM)
+#define CONFIG_SYS_SPD_BUS_NUM 0
+#endif
+
+#ifndef I2C_SOFT_DECLARATIONS
+# if defined(CONFIG_MPC8260)
+# define I2C_SOFT_DECLARATIONS volatile ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, I2C_PORT);
+# elif defined(CONFIG_8xx)
+# define I2C_SOFT_DECLARATIONS volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
+
+# elif (defined(CONFIG_AT91RM9200) || \
+ defined(CONFIG_AT91SAM9260) || defined(CONFIG_AT91SAM9261) || \
+ defined(CONFIG_AT91SAM9263)) && !defined(CONFIG_AT91_LEGACY)
+# define I2C_SOFT_DECLARATIONS at91_pio_t *pio = (at91_pio_t *) AT91_PIO_BASE;
+# else
+# define I2C_SOFT_DECLARATIONS
+# endif
+#endif
+
+#ifdef CONFIG_8xx
+/* 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