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Subject[PATCH v8 1/4] mtd: spi-nor: add support for is25wp256
Date
Update spi_nor_id table for is25wp256 (32MB) device from ISSI,
present on HiFive Unleashed dev board (Rev: A00).

Set method to enable quad mode for ISSI device in flash parameters
table.

Based on code originally written by Wesley Terpstra <wesley@sifive.com>
and/or Palmer Dabbelt <palmer@sifive.com>
https://github.com/riscv/riscv-linux/commit/c94e267766d62bc9a669611c3d0c8ed5ea26569b

Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@sifive.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
---
drivers/mtd/spi-nor/spi-nor.c | 9 ++++++++-
include/linux/mtd/spi-nor.h | 1 +
2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 03cc788..6635127 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1946,7 +1946,10 @@ static int spi_nor_spansion_clear_sr_bp(struct spi_nor *nor)
SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
{ "is25wp128", INFO(0x9d7018, 0, 64 * 1024, 256,
SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
-
+ { "is25wp256", INFO(0x9d7019, 0, 64 * 1024, 1024,
+ SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+ SPI_NOR_4B_OPCODES)
+ },
/* Macronix */
{ "mx25l512e", INFO(0xc22010, 0, 64 * 1024, 1, SECT_4K) },
{ "mx25l2005a", INFO(0xc22012, 0, 64 * 1024, 4, SECT_4K) },
@@ -3776,6 +3779,10 @@ static int spi_nor_init_params(struct spi_nor *nor,
case SNOR_MFR_ST:
case SNOR_MFR_MICRON:
break;
+ case SNOR_MFR_ISSI:
+ params->quad_enable = macronix_quad_enable;
+ break;
+

default:
/* Kept only for backward compatibility purpose. */
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 9f57cdf..5d6583e 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -21,6 +21,7 @@
#define SNOR_MFR_INTEL CFI_MFR_INTEL
#define SNOR_MFR_ST CFI_MFR_ST /* ST Micro */
#define SNOR_MFR_MICRON CFI_MFR_MICRON /* Micron */
+#define SNOR_MFR_ISSI 0x9d /* ISSI */
#define SNOR_MFR_MACRONIX CFI_MFR_MACRONIX
#define SNOR_MFR_SPANSION CFI_MFR_AMD
#define SNOR_MFR_SST CFI_MFR_SST
--
1.9.1
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