From a84d45217c8fbfab3f522dc84767f7f08ab1a85e Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Mon, 5 Aug 2024 00:15:35 +0200 Subject: mtd: spi-nor: winbond: add Zetta ZD25Q128C support Zetta normally uses BAh as its vendor ID. But for the ZD25Q128C they took the one from Winbond and messed up the size parameters in SFDP. Most functions seem compatible with the W25Q128, we just have to fix up the size. Link: http://www.zettadevice.com/upload/file/20150821/DS_Zetta_25Q128_RevA.pdf Link: https://www.lcsc.com/datasheet/lcsc_datasheet_2312081757_Zetta-ZD25Q128CSIGT_C19626875.pdf Signed-off-by: Michael Walle Reviewed-by: Pratyush Yadav Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/20240804221535.291923-1-mwalle@kernel.org --- drivers/mtd/spi-nor/winbond.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'drivers/mtd') diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c index e065e4fd42a3..9f7ce5763e71 100644 --- a/drivers/mtd/spi-nor/winbond.c +++ b/drivers/mtd/spi-nor/winbond.c @@ -17,6 +17,31 @@ SPI_MEM_OP_NO_DUMMY, \ SPI_MEM_OP_DATA_OUT(1, buf, 0)) +static int +w25q128_post_bfpt_fixups(struct spi_nor *nor, + const struct sfdp_parameter_header *bfpt_header, + const struct sfdp_bfpt *bfpt) +{ + /* + * Zetta ZD25Q128C is a clone of the Winbond device. But the encoded + * size is really wrong. It seems that they confused Mbit with MiB. + * Thus the flash is discovered as a 2MiB device. + */ + if (bfpt_header->major == SFDP_JESD216_MAJOR && + bfpt_header->minor == SFDP_JESD216_MINOR && + nor->params->size == SZ_2M && + nor->params->erase_map.regions[0].size == SZ_2M) { + nor->params->size = SZ_16M; + nor->params->erase_map.regions[0].size = SZ_16M; + } + + return 0; +} + +static const struct spi_nor_fixups w25q128_fixups = { + .post_bfpt = w25q128_post_bfpt_fixups, +}; + static int w25q256_post_bfpt_fixups(struct spi_nor *nor, const struct sfdp_parameter_header *bfpt_header, @@ -108,6 +133,7 @@ static const struct flash_info winbond_nor_parts[] = { .size = SZ_16M, .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB, .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ, + .fixups = &w25q128_fixups, }, { .id = SNOR_ID(0xef, 0x40, 0x19), .name = "w25q256", -- cgit v1.2.3