+
+int do_eep_wren (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int query = argc == 1;
+ int state = 0;
+
+ if (query) {
+ /* Query write access state. */
+ state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, -1);
+ if (state < 0) {
+ puts ("Query of write access state failed.\n");
+ } else {
+ printf ("Write access for device 0x%0x is %sabled.\n",
+ CONFIG_SYS_I2C_EEPROM_ADDR, state ? "en" : "dis");
+ state = 0;
+ }
+ } else {
+ if ('0' == argv[1][0]) {
+ /* Disable write access. */
+ state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, 0);
+ } else {
+ /* Enable write access. */
+ state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, 1);
+ }
+ if (state < 0) {
+ puts ("Setup of write access state failed.\n");
+ }
+ }
+
+ return state;
+}
+
+U_BOOT_CMD(eepwren, 2, 0, do_eep_wren,
+ "Enable / disable / query EEPROM write access",
+ ""
+);
+#endif /* #if defined(CONFIG_SYS_EEPROM_WREN) */