Messages in this thread Patch in this message | | | From | Tudor Ambarus <> | Subject | [PATCH 1/2] mtd: spi-nor: core: Introduce SPI_NOR_SOFT_RESET flash_info fixup_flag | Date | Thu, 9 Dec 2021 19:21:07 +0200 |
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The Soft Reset and Rescue Sequence Support is defined in BFPT_DWORD(16) starting with JESD216A. The first version of SFDP, JESD216 (April 2011), defines just the first 9 BFPT DWORDS, thus it does not contain information about the Software Reset and Rescue Support. Since this support can not be discovered by parsing the first SFDP version, introduce a flash_info fixup_flag that will be used either by flashes that define JESD216 (April 2011) or by flashes that do not define SFDP at all. In case a flash defines BFPT_DWORD(16) but with wrong values, one should instead use a post_bfpt() hook and set SNOR_F_SOFT_RESET.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> --- drivers/mtd/spi-nor/core.c | 3 +++ drivers/mtd/spi-nor/core.h | 3 +++ 2 files changed, 6 insertions(+)
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 2e21d5ac0e2d..32d80fdaa2a2 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2699,6 +2699,9 @@ static void spi_nor_init_fixup_flags(struct spi_nor *nor) if (fixup_flags & SPI_NOR_IO_MODE_EN_VOLATILE) nor->flags |= SNOR_F_IO_MODE_EN_VOLATILE; + + if (fixup_flags & SPI_NOR_SOFT_RESET) + nor->flags |= SNOR_F_SOFT_RESET; } /** diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index 2afb610853a9..70c6bb7f5f04 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -373,6 +373,8 @@ struct spi_nor_fixups { * memory size above 128Mib. * SPI_NOR_IO_MODE_EN_VOLATILE: flash enables the best available I/O mode * via a volatile bit. + * SPI_NOR_SOFT_RESET: flash supports software reset enable, reset + * sequence. * @mfr_flags: manufacturer private flags. Used in the manufacturer fixup * hooks to differentiate support between flashes of the same * manufacturer. @@ -416,6 +418,7 @@ struct flash_info { u8 fixup_flags; #define SPI_NOR_4B_OPCODES BIT(0) #define SPI_NOR_IO_MODE_EN_VOLATILE BIT(1) +#define SPI_NOR_SOFT_RESET BIT(2) u8 mfr_flags; -- 2.25.1
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