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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 <redacted>
---
 drivers/mtd/spi-nor/core.h | 1 +
 drivers/mtd/spi-nor/sfdp.c | 4 ++++
 drivers/mtd/spi-nor/sfdp.h | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 6338d32a0d77..79ce952c0539 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h

@@ -26,6 +26,7 @@ enum spi_nor_option_flags {
        SNOR_F_HAS_SR_TB_BIT6   = BIT(11),
        SNOR_F_HAS_4BIT_BP      = BIT(12),
        SNOR_F_HAS_SR_BP3_BIT6  = BIT(13),
+       SNOR_F_SOFT_RESET       = BIT(14),
 };

 struct spi_nor_read_command {

diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c
index 7983ff431346..8e0741d8bfd3 100644
--- a/drivers/mtd/spi-nor/sfdp.c
+++ b/drivers/mtd/spi-nor/sfdp.c

@@ -616,6 +616,10 @@ 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 not JESD216 rev C or later. */
        if (bfpt_header->length == BFPT_DWORD_MAX_JESD216B)
                return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt,

diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h
index 6d7243067252..8ae55e98084e 100644
--- a/drivers/mtd/spi-nor/sfdp.h
+++ b/drivers/mtd/spi-nor/sfdp.h

@@ -90,6 +90,8 @@ struct sfdp_bfpt {
 #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 */
--

2.27.0