diff --git a/flashchips.c b/flashchips.c
index 238389b..0fc1b7a 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -6295,6 +6295,85 @@
 
 	{
 		.vendor		= "GigaDevice",
+		.name		= "GD25VQ21B",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD25VQ21B,
+		.total_size	= 256,
+		.page_size	= 256,
+		/* OTP: 1536B total; read 0x48, write 0x42, erase 0x44 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_QPI,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { { 4 * 1024, 64} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { { 32 * 1024, 8} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { { 64 * 1024, 4} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd, /* TODO: 2nd status reg (read with 0x35) */
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2300, 3600},
+	},
+
+	{
+		.vendor		= "GigaDevice",
+		.name		= "GD25VQ40C",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD25VQ41B,
+		.total_size	= 512,
+		.page_size	= 256,
+		/* Supports SFDP */
+		/* OTP: 1024B total; read 0x48, write 0x42, erase 0x44 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_QPI,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { { 4 * 1024, 128} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { { 32 * 1024, 16} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { { 64 * 1024, 8} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd, /* TODO: 2nd status reg (read with 0x35) */
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2300, 3600},
+	},
+
+	{
+		.vendor		= "GigaDevice",
 		.name		= "GD25VQ41B",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= GIGADEVICE_ID,
@@ -6325,9 +6404,88 @@
 			.block_erase = spi_block_erase_c7,
 		  }
 		},
-		/* TODO: 2nd Status Register; read 0x35 */
 		.printlock	= spi_prettyprint_status_register_bp4_srwd,
-		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd, /* TODO: 2nd status reg (read with 0x35) */
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2300, 3600},
+	},
+
+	{
+		.vendor		= "GigaDevice",
+		.name		= "GD25VQ80C",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD25VQ80C,
+		.total_size	= 1024,
+		.page_size	= 256,
+		/* Supports SFDP */
+		/* OTP: 1024B total; read 0x48, write 0x42, erase 0x44 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_QPI,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { { 4 * 1024, 256} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { { 32 * 1024, 32} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { { 64 * 1024, 16} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd, /* TODO: 2nd status reg (read with 0x35) */
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2300, 3600},
+	},
+
+	{
+		.vendor		= "GigaDevice",
+		.name		= "GD25VQ16C",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD25VQ16C,
+		.total_size	= 2 * 1024,
+		.page_size	= 256,
+		/* Supports SFDP */
+		/* OTP: 1024B total; read 0x48, write 0x42, erase 0x44 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_QPI,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { { 4 * 1024, 512} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { { 32 * 1024, 64} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { { 64 * 1024, 32} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd, /* TODO: 2nd status reg (read with 0x35) */
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
 		.voltage	= {2300, 3600},
diff --git a/flashchips.h b/flashchips.h
index a109e94..9ffb30f 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -372,13 +372,16 @@
 #define GIGADEVICE_GD25Q32	0x4016	/* Same as GD25Q32B */
 #define GIGADEVICE_GD25Q64	0x4017	/* Same as GD25Q64B */
 #define GIGADEVICE_GD25Q128	0x4018	/* GD25Q128B and GD25Q128C only, can be distinguished by SFDP */
+#define GIGADEVICE_GD25VQ21B	0x4212
+#define GIGADEVICE_GD25VQ41B	0x4213  /* Same as GD25VQ40C, can be distinguished by SFDP */
+#define GIGADEVICE_GD25VQ80C	0x4214
+#define GIGADEVICE_GD25VQ16C	0x4215
 #define GIGADEVICE_GD25LQ40	0x6013
 #define GIGADEVICE_GD25LQ80	0x6014
 #define GIGADEVICE_GD25LQ16	0x6015
 #define GIGADEVICE_GD25LQ32	0x6016
 #define GIGADEVICE_GD25LQ64	0x6017	/* Same as GD25LQ64B (which is faster) */
 #define GIGADEVICE_GD25LQ128	0x6018
-#define GIGADEVICE_GD25VQ41B	0x4213
 #define GIGADEVICE_GD29GL064CAB	0x7E0601
 
 #define HYUNDAI_ID		0xAD	/* Hyundai */