The GD55LB02GF supports Dual Output Fast Read and Dual IO Fast Read according to its datasheet, but its entry only declares the single and quad reads.
>From the datasheet below, see: - section 4.1 "SPI Mode": Dual SPI cmd are 3Bh, 3Ch, BBh and BCh - section 8.16 "Dual Output Fast Read (3Bh/3Ch)" - section 8.18 "Dual I/O Fast Read (BBh/BCh)" Link: https://download.gigadevice.com/Datasheet/DS-01015-GD55LB02GF-Rev1.3.pdf Signed-off-by: Vincent Jardin <[email protected]> --- Changes in v2: - Add a Link to the datasheet and sections (Takahiro) drivers/mtd/spi/spi-nor-ids.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/spi/spi-nor-ids.c b/drivers/mtd/spi/spi-nor-ids.c index 31a2ba49a87..59247b3f4b9 100644 --- a/drivers/mtd/spi/spi-nor-ids.c +++ b/drivers/mtd/spi/spi-nor-ids.c @@ -233,7 +233,8 @@ const struct flash_info spi_nor_ids[] = { }, { INFO("gd55lb02gf", 0xc8601c, 0, 64 * 1024, 4096, - SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | + SPI_NOR_4B_OPCODES) }, #endif #ifdef CONFIG_SPI_FLASH_ISSI /* ISSI */ --- base-commit: a06e89ab05eaa2b8344d521319399333cd760ae5 branch: for-upstream/mtd-gd55lb02gf-dual-read-v2 -- 2.43.0
