+int env_eeprom_bus = -1;
+
+static int eeprom_bus_read (unsigned dev_addr, unsigned offset, uchar *buffer,
+ unsigned cnt)
+{
+ int rcode;
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+ int old_bus = i2c_get_bus_num();
+
+ if (gd->flags & GD_FLG_RELOC) {
+ if (env_eeprom_bus == -1) {
+ I2C_MUX_DEVICE *dev = NULL;
+ dev = i2c_mux_ident_muxstring(
+ (uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
+ if (dev != NULL) {
+ env_eeprom_bus = dev->busid;
+ } else
+ printf ("error adding env eeprom bus.\n");
+ }
+ if (old_bus != env_eeprom_bus) {
+ i2c_set_bus_num(env_eeprom_bus);
+ old_bus = env_eeprom_bus;
+ }
+ } else {
+ rcode = i2c_mux_ident_muxstring_f(
+ (uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
+ }
+#endif
+
+ rcode = eeprom_read (dev_addr, offset, buffer, cnt);
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+ if (old_bus != env_eeprom_bus)
+ i2c_set_bus_num(old_bus);
+#endif
+ return rcode;
+}
+
+static int eeprom_bus_write (unsigned dev_addr, unsigned offset, uchar *buffer,
+ unsigned cnt)
+{
+ int rcode;
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+ int old_bus = i2c_get_bus_num();
+
+ rcode = i2c_mux_ident_muxstring_f((uchar *)CONFIG_I2C_ENV_EEPROM_BUS);
+#endif
+ rcode = eeprom_write (dev_addr, offset, buffer, cnt);
+#if defined(CONFIG_I2C_ENV_EEPROM_BUS)
+ i2c_set_bus_num(old_bus);
+#endif
+ return rcode;
+}