lwn.git/drivers/mtd/spi-nor/spansion.c, branch docs-fixes

mtd: spi-nor: spansion: SMPT fixups for S25FS-S

2025-11-10T10:12:06+00:00

S25FS-S family supports SMPT that helps to detect sector layout settings in configuration registers, but some of parameters in the table are wrong or undetermined so the fixups below are required. Read Any Register op is used to read configuration registers that related to sector map. The op requires 8 cycles latency by default. Implement smpt_read_dummy() to set correct dummy cycles. Map ID is structured by combination of CR3NV[3], CR1NV[2], and CR3NV[1]. However, in S25FS512S, CR3NV[1] is RFU and always 0, while map IDs defined in the table assume it is always 1. Implement smpt_map_id() to fix map ID for S25FS512S. Other densities in S25FS-S family (256Mb and 128Mb) don't need this fix as CR3NV[1] in those chips is configurable and map IDs are correctly defined in SMPT. Co-developed-by: Marek Vasut Signed-off-by: Marek Vasut Reviewed-by: Tudor Ambarus Tested-by: Marek Vasut # S25FS512S Signed-off-by: Takahiro Kuwano Signed-off-by: Pratyush Yadav

mtd: spi-nor: spansion: Fixup params->set_4byte_addr_mode for SEMPER

2025-07-03T14:57:12+00:00

Infineon SEMPER flash family does not support E9h opcode as Exit 4-byte mode (EX4B). Therefore, params->set_4byte_addr_mode is not determined by BFPT parse. Fixup it up by introducing vendor specific EX4B opcode (B8h) and function. Fixes: c87c9b11c53ce ("mtd: spi-nor: spansion: Determine current address mode") Signed-off-by: Takahiro Kuwano Acked-by: Tudor Ambarus Acked-by: Pratyush Yadav Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/20250612074427.22263-1-Takahiro.Kuwano@infineon.com

mtd: spi-nor: Constify struct spi_nor_fixups

2025-07-03T14:50:21+00:00

'struct spi_nor_fixups' are not modified in this driver. Constifying these structures moves some data to a read-only section, so increases overall security, especially when the structure holds some function pointers. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 23304 13168 0 36472 8e78 drivers/mtd/spi-nor/micron-st.o After: ===== text data bss dec hex filename 23560 12912 0 36472 8e78 drivers/mtd/spi-nor/micron-st.o Signed-off-by: Christophe JAILLET Acked-by: Pratyush Yadav Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/aa641732ba707ce3690217825c3ca7373ffde4f9.1748191985.git.christophe.jaillet@wanadoo.fr

mtd: spi-nor: spansion: Add support for S28HL02GT

2025-01-13T15:51:10+00:00

Infineon S28HL02GT is 3.0V, 2Gb Flash device with Octal interface. It has the same functionalities with S28HS02GT. Link: https://www.infineon.com/dgdl/Infineon-S28HS02GT_S28HS04GT_S28HL02GT_S28HL04GT_2Gb_4Gb_SEMPER_Flash_Octal_interface_1.8V_3.0V-DataSheet-v01_00-EN.pdf?fileId=8ac78c8c7e7124d1017f0631e33714d9 Signed-off-by: Takahiro Kuwano Reviewed-by: Tudor Ambarus [pratyush@kernel.org: add comment with flash name] Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/dc6aa706253a5200ff0c0d4523c2540312575c01.1734588106.git.Takahiro.Kuwano@infineon.com

mtd: spi-nor: spansion: Add support for S28HL256T

2025-01-13T15:51:05+00:00

Infineon S28HL256T is 3.0V, 256Mb Flash device with Octal interface. It has the same functionalities with S28HS256T(1.8V). Link: https://www.infineon.com/dgdl/Infineon-S28HS256T_S28HL256T_256Mb_SEMPER_Flash_Octal_interface_1_8V_3-DataSheet-v02_00-EN.pdf?fileId=8ac78c8c8fc2dd9c018fc66787aa0657 Signed-off-by: Takahiro Kuwano Reviewed-by: Tudor Ambarus [pratyush@kernel.org: add comment with flash name] Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/f052b04693f1100e725e076fd8a0ae339f8002c4.1734588106.git.Takahiro.Kuwano@infineon.com

mtd: spi-nor: spansion: Use nor->addr_nbytes in octal DTR mode in RD_ANY_REG_OP

2024-10-29T08:23:00+00:00

In octal DTR mode, RD_ANY_REG_OP needs to use 4-byte address regardless of flash's internal address mode. Use nor->addr_nbytes which is set to 4 during setup. Fixes: eff9604390d6 ("mtd: spi-nor: spansion: add octal DTR support in RD_ANY_REG_OP") Signed-off-by: Takahiro Kuwano Link: https://lore.kernel.org/r/20241016000837.17951-1-Takahiro.Kuwano@infineon.com Signed-off-by: Tudor Ambarus

mtd: spi-nor: spansion: Add support for S28HS256T

2024-09-14T15:56:31+00:00

Infineon S28HS256T is 256Mb Octal SPI device which has same functionalities with 512Mb and 1Gb parts. Link: https://www.infineon.com/dgdl/Infineon-S28HS256T_S28HL256T_256Mb_SEMPER_Flash_Octal_interface_1_8V_3-DataSheet-v02_00-EN.pdf?fileId=8ac78c8c8fc2dd9c018fc66787aa0657 Signed-off-by: Takahiro Kuwano Reviewed-by: Michael Walle Signed-off-by: Pratyush Yadav Link: https://lore.kernel.org/r/20240830080428.6994-1-Takahiro.Kuwano@infineon.com

mtd: spi-nor: spansion: enable die erase for multi die flashes

2023-12-06T09:25:07+00:00

Enable die erase for spansion multi die flashes. Tested-by: Takahiro Kuwano Link: https://lore.kernel.org/r/20231125123529.55686-3-tudor.ambarus@linaro.org Signed-off-by: Tudor Ambarus

mtd: spi-nor: spansion: sort flash_info database

2023-09-19T15:59:21+00:00

The flash ID is the new primary key into our database. Sort the entry by it. Keep the most specific ones first, because there might be ID collisions between shorter and longer ones. Signed-off-by: Michael Walle Link: https://lore.kernel.org/r/20230807-mtd-flash-info-db-rework-v3-37-e60548861b10@kernel.org Signed-off-by: Tudor Ambarus

mtd: spi-nor: spansion: convert flash_info to new format

2023-09-19T15:59:20+00:00

The INFOx() macros are going away. Convert the flash_info database to the new format. Signed-off-by: Michael Walle Link: https://lore.kernel.org/r/20230807-mtd-flash-info-db-rework-v3-26-e60548861b10@kernel.org Signed-off-by: Tudor Ambarus