#define M29F800AB      0x0058
 #define M29W800DT      0x00D7
 #define M29W800DB      0x005B
+#define M29W400DT      0x00EE
+#define M29W400DB      0x00EF
 #define M29W160DT      0x22C4
 #define M29W160DB      0x2249
 #define M29W040B       0x00E3
                        ERASEINFO(0x08000,1),
                        ERASEINFO(0x10000,15)
                }
+       },  {
+               .mfr_id         = MANUFACTURER_ST,
+               .dev_id         = M29W400DT,
+               .name           = "ST M29W400DT",
+               .devtypes       = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8,
+               .uaddr          = MTD_UADDR_0x0AAA_0x0555,
+               .dev_size       = SIZE_512KiB,
+               .cmd_set        = P_ID_AMD_STD,
+               .nr_regions     = 4,
+               .regions        = {
+                       ERASEINFO(0x04000,7),
+                       ERASEINFO(0x02000,1),
+                       ERASEINFO(0x08000,2),
+                       ERASEINFO(0x10000,1)
+               }
+       }, {
+               .mfr_id         = MANUFACTURER_ST,
+               .dev_id         = M29W400DB,
+               .name           = "ST M29W400DB",
+               .devtypes       = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8,
+               .uaddr          = MTD_UADDR_0x0AAA_0x0555,
+               .dev_size       = SIZE_512KiB,
+               .cmd_set        = P_ID_AMD_STD,
+               .nr_regions     = 4,
+               .regions        = {
+                       ERASEINFO(0x04000,1),
+                       ERASEINFO(0x02000,2),
+                       ERASEINFO(0x08000,1),
+                       ERASEINFO(0x10000,7)
+               }
        }, {
                .mfr_id         = MANUFACTURER_ST,      /* FIXME - CFI device? */
                .dev_id         = M29W160DT,