diff --git a/flashchips.c b/flashchips.c
index 9fb3914..487c708 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -8785,6 +8785,73 @@
 
 	{
 		.vendor		= "GigaDevice",
+		.name		= "GD25B512MF/GD25R512MF",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD25B512MF,
+		.total_size	= 65536,
+		.page_size	= 256,
+		/* Has non-volatile DC bits which affect DIO and QIO in SPI mode. */
+		.feature_bits	= FEATURE_WRSR_EITHER | FEATURE_WRSR_EXT2 | FEATURE_WRSR2 | FEATURE_WRSR3 |
+				  FEATURE_OTP | FEATURE_4BA | FEATURE_FAST_READ_QPI4B |
+				  (FEATURE_QPI_SRP & ~(FEATURE_FAST_READ_DIO | FEATURE_FAST_READ_QIO)),
+		.dummy_cycles	= { .qpi_read_params = { 4, 6, 8, 8 } },
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16384} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 16384} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 2048} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 2048} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1024} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 1024} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {65536 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {65536 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+		.reg_bits	=
+		{
+			.qe	= {STATUS2, 1, RO}, /* Fixed QE=1 */
+			.dc	= {{STATUS3, 0, RW}, {STATUS3, 1, RW}},
+			.srp	= {STATUS1, 7, RW},
+			.srl	= {STATUS2, 6, RW},
+			.bp	= {{STATUS1, 2, RW}, {STATUS1, 3, RW}, {STATUS1, 4, RW}, {STATUS1, 5, RW}},
+			.tb	= {STATUS1, 6, RW},
+			.cmp	= {STATUS3, 3, RW},
+		},
+		.wp_write_cfg	= spi_wp_write_cfg,
+		.wp_read_cfg	= spi_wp_read_cfg,
+		.wp_get_ranges	= spi_wp_get_available_ranges,
+		.decode_range	= decode_range_spi25,
+		.prepare_access	= spi_prepare_io,
+		.finish_access	= spi_finish_io,
+	},
+
+	{
+		.vendor		= "GigaDevice",
 		.name		= "GD55B01GE",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= GIGADEVICE_ID,
@@ -8842,6 +8909,73 @@
 
 	{
 		.vendor		= "GigaDevice",
+		.name		= "GD55B01GF",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD55B01GF,
+		.total_size	= 128 * 1024,
+		.page_size	= 256,
+		/* Has non-volatile DC bits which affect DIO and QIO in SPI mode. */
+		.feature_bits	= FEATURE_WRSR_EITHER | FEATURE_WRSR_EXT2 | FEATURE_WRSR2 | FEATURE_WRSR3 |
+				  FEATURE_OTP | FEATURE_4BA | FEATURE_FAST_READ_QPI4B |
+				  (FEATURE_QPI_SRP & ~(FEATURE_FAST_READ_DIO | FEATURE_FAST_READ_QIO)),
+		.dummy_cycles	= { .qpi_read_params = { 4, 6, 8, 8 } },
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32768} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 32768} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 4096} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 4096} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 2048} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 2048} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {128 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+		.reg_bits	=
+		{
+			.qe	= {STATUS2, 1, RO}, /* Fixed QE=1 */
+			.dc	= {{STATUS3, 0, RW}, {STATUS3, 1, RW}},
+			.srp	= {STATUS1, 7, RW},
+			.srl	= {STATUS2, 6, RW},
+			.bp	= {{STATUS1, 2, RW}, {STATUS1, 3, RW}, {STATUS1, 4, RW}, {STATUS1, 5, RW}},
+			.tb	= {STATUS1, 6, RW},
+			.cmp	= {STATUS3, 3, RW},
+		},
+		.wp_write_cfg	= spi_wp_write_cfg,
+		.wp_read_cfg	= spi_wp_read_cfg,
+		.wp_get_ranges	= spi_wp_get_available_ranges,
+		.decode_range	= decode_range_spi25,
+		.prepare_access	= spi_prepare_io,
+		.finish_access	= spi_finish_io,
+	},
+
+	{
+		.vendor		= "GigaDevice",
 		.name		= "GD55B02GE",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= GIGADEVICE_ID,
@@ -8899,6 +9033,73 @@
 
 	{
 		.vendor		= "GigaDevice",
+		.name		= "GD55B02GF",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD55B02GF,
+		.total_size	= 256 * 1024,
+		.page_size	= 256,
+		/* Has non-volatile DC bits which affect DIO and QIO in SPI mode. */
+		.feature_bits	= FEATURE_WRSR_EITHER | FEATURE_WRSR_EXT2 | FEATURE_WRSR2 | FEATURE_WRSR3 |
+				  FEATURE_OTP | FEATURE_4BA | FEATURE_FAST_READ_QPI4B |
+				  (FEATURE_QPI_SRP & ~(FEATURE_FAST_READ_DIO | FEATURE_FAST_READ_QIO)),
+		.dummy_cycles	= { .qpi_read_params = { 4, 6, 8, 8 } },
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 65536} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 65536} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 8192} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 8192} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 4096} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 4096} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {256 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+		.reg_bits	=
+		{
+			.qe	= {STATUS2, 1, RO}, /* Fixed QE=1 */
+			.dc	= {{STATUS3, 0, RW}, {STATUS3, 1, RW}},
+			.srp	= {STATUS1, 7, RW},
+			.srl	= {STATUS2, 6, RW},
+			.bp	= {{STATUS1, 2, RW}, {STATUS1, 3, RW}, {STATUS1, 4, RW}, {STATUS1, 5, RW}},
+			.tb	= {STATUS1, 6, RW},
+			.cmp	= {STATUS3, 3, RW},
+		},
+		.wp_write_cfg	= spi_wp_write_cfg,
+		.wp_read_cfg	= spi_wp_read_cfg,
+		.wp_get_ranges	= spi_wp_get_available_ranges,
+		.decode_range	= decode_range_spi25,
+		.prepare_access	= spi_prepare_io,
+		.finish_access	= spi_finish_io,
+	},
+
+	{
+		.vendor		= "GigaDevice",
 		.name		= "GD25T80",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= GIGADEVICE_ID,