--- a/drivers/mtd/nand/spi/gigadevice.c
+++ b/drivers/mtd/nand/spi/gigadevice.c
@@ -39,8 +39,9 @@ static SPINAND_OP_VARIANTS(read_cache_va
 		SPINAND_PAGE_READ_FROM_CACHE_OP_3A(true, 0, 1, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_OP_3A(false, 0, 0, NULL, 0));
 
-/* Q5 devices, QUADIO: Dummy bytes only valid for 1 GBit variants */
-static SPINAND_OP_VARIANTS(gd5f1gq5_read_cache_variants,
+/* For Q5 devices, QUADIO use different dummy byte settings */
+/* Q5 1Gb */
+static SPINAND_OP_VARIANTS(dummy2_read_cache_variants,
 		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
@@ -48,6 +49,15 @@ static SPINAND_OP_VARIANTS(gd5f1gq5_read
 		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
 
+/* Q5 2Gb & 4Gb */
+static SPINAND_OP_VARIANTS(dummy4_read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 4, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 2, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+
 static SPINAND_OP_VARIANTS(write_cache_variants,
 		SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
 		SPINAND_PROG_LOAD(true, 0, NULL, 0));
@@ -249,7 +259,7 @@ static const struct spinand_info gigadev
 	             SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x01),
 		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
 		     NAND_ECCREQ(8, 512),
-		     SPINAND_INFO_OP_VARIANTS(&gd5f1gq5_read_cache_variants,
+		     SPINAND_INFO_OP_VARIANTS(&dummy2_read_cache_variants,
 					      &write_cache_variants,
 					      &update_cache_variants),
 		     0,
@@ -309,7 +319,87 @@ static const struct spinand_info gigadev
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x51),
 		     NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
 		     NAND_ECCREQ(4, 512),
-		     SPINAND_INFO_OP_VARIANTS(&gd5f1gq5_read_cache_variants,
+		     SPINAND_INFO_OP_VARIANTS(&dummy2_read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq5xexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F2GQ5UExxG",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x52),
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&dummy4_read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq5xexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F4GQ6UExxG",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x55),
+		     NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&dummy4_read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq5xexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F1GM7UExxG",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x91),
+		     NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq4uexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F2GM7UExxG",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x92),
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq4uexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F4GM8UExxG",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x95),
+		     NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq4uexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F1GQ5UExxH",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x31),
+		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq5xexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F2GQ5UExxH",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x32),
+		     NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&gd5fxgqx_variant2_ooblayout,
+				     gd5fxgq5xexxg_ecc_get_status)),
+	SPINAND_INFO("GD5F4GQ6UExxH",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x32),
+		     NAND_MEMORG(1, 2048, 64, 64, 4096, 80, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 					      &write_cache_variants,
 					      &update_cache_variants),
 		     SPINAND_HAS_QE_BIT,