[PATCH v2 2/3] mtd: spi-nor: add SFDP fixups for Quad Page Program

Sudip Mukherjee
2022-08-09T20:15:09Z

SFDP table of some flash chips do not advertise support of Quad Input
Page Program even though it has support. Use fixup flags and add hardware
cap for these chips.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@sifive.com>
---
drivers/mtd/spi-nor/core.c | 9 +++++++++
drivers/mtd/spi-nor/core.h | 2 ++
2 files changed, 11 insertions(+)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index f2c64006f8d7..7542404332a5 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1962,6 +1962,12 @@ spi_nor_spimem_adjust_hwcaps(struct spi_nor *nor, u32 *hwcaps)
if (nor->flags & SNOR_F_BROKEN_RESET)
*hwcaps &= ~(SNOR_HWCAPS_X_X_X | SNOR_HWCAPS_X_X_X_DTR);

+ if (nor->flags & SNOR_F_HAS_QUAD_PP) {
+ *hwcaps |= SNOR_HWCAPS_PP_1_1_4;
+ spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP_1_1_4],
+ SPINOR_OP_PP_1_1_4, SNOR_PROTO_1_1_4);
+ }
+
for (cap = 0; cap < sizeof(*hwcaps) * BITS_PER_BYTE; cap++) {
int rdidx, ppidx;

@@ -2446,6 +2452,9 @@ 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_QUAD_PP)
+ nor->flags |= SNOR_F_HAS_QUAD_PP;
}

/**
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 85b0cf254e97..7dbdf16a67b4 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -130,6 +130,7 @@ enum spi_nor_option_flags {
SNOR_F_IO_MODE_EN_VOLATILE = BIT(11),
SNOR_F_SOFT_RESET = BIT(12),
SNOR_F_SWP_IS_VOLATILE = BIT(13),
+ SNOR_F_HAS_QUAD_PP = BIT(14),
};

struct spi_nor_read_command {
@@ -520,6 +521,7 @@ 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_QUAD_PP BIT(2)

u8 mfr_flags;

--
2.30.2