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| author | Pratyush Yadav <p.yadav@ti.com> | 2021-06-26 00:47:23 +0530 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2021-06-28 12:04:30 +0530 |
| commit | a1122a3d98430754626547eb0acba11645039881 (patch) | |
| tree | d01fcb13b0a86af93a7e296fe47a37c09ed0f39f /drivers | |
| parent | b058f108d7d91f9a5f47c1d0d3ddf4e6ae030440 (diff) | |
| download | u-boot-a1122a3d98430754626547eb0acba11645039881.zip u-boot-a1122a3d98430754626547eb0acba11645039881.tar.gz u-boot-a1122a3d98430754626547eb0acba11645039881.tar.bz2 | |
mtd: spi-nor-core: Detect Soft Reset sequence support from BFPT
A Soft Reset sequence will return the flash to Power-on-Reset (POR)
state. It consists of two commands: Soft Reset Enable and Soft Reset.
Find out if the sequence is supported from BFPT DWORD 16.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/spi/spi-nor-core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index b5b1ac8..0d38ffc 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -153,6 +153,8 @@ struct sfdp_header { #define BFPT_DWORD15_QER_SR2_BIT1_NO_RD (0x4UL << 20) #define BFPT_DWORD15_QER_SR2_BIT1 (0x5UL << 20) /* Spansion */ +#define BFPT_DWORD16_SOFT_RST BIT(12) + #define BFPT_DWORD18_CMD_EXT_MASK GENMASK(30, 29) #define BFPT_DWORD18_CMD_EXT_REP (0x0UL << 29) /* Repeat */ #define BFPT_DWORD18_CMD_EXT_INV (0x1UL << 29) /* Invert */ @@ -2104,6 +2106,10 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, break; } + /* Soft Reset support. */ + if (bfpt.dwords[BFPT_DWORD(16)] & BFPT_DWORD16_SOFT_RST) + nor->flags |= SNOR_F_SOFT_RESET; + /* Stop here if JESD216 rev B. */ if (bfpt_header->length == BFPT_DWORD_MAX_JESD216B) return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, |