[PATCH v1] mtd: spi-nor: add support for is25wp256d

[Sagar Shrikant Kadam]

Add support for is25wp256d device from ISSI, present on HiFive
Unleashed dev board (Rev: A00).

Enable quad mode for ISSI device in flash parameters
table.

Signed-off-by: Wesley W. Terpstra <wesley@xxxxxxxxxx>
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxx>
Signed-off-by: Sagar Shrikant Kadam <sagar.kadam@xxxxxxxxxx>
---
 drivers/mtd/spi-nor/spi-nor.c | 8 ++++++++
 include/linux/mtd/spi-nor.h   | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index fae1474..cec26a9 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1834,6 +1834,10 @@ static int sr2_bit7_quad_enable(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) },
+	{ "is25wp256d", 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) },
@@ -3650,6 +3654,10 @@ static int spi_nor_init_params(struct spi_nor *nor,
 		case SNOR_MFR_MACRONIX:
 			params->quad_enable = macronix_quad_enable;
 			break;
+		case SNOR_MFR_ISSI:
+			params->quad_enable = macronix_quad_enable;
+			break;
+
 
 		case SNOR_MFR_ST:
 		case SNOR_MFR_MICRON:
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index b3d360b..ff13297 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -19,6 +19,7 @@
 #define SNOR_MFR_ATMEL		CFI_MFR_ATMEL
 #define SNOR_MFR_GIGADEVICE	0xc8
 #define SNOR_MFR_INTEL		CFI_MFR_INTEL
+#define SNOR_MFR_ISSI		0x9d		/* ISSI */
 #define SNOR_MFR_ST		CFI_MFR_ST	/* ST Micro */
 #define SNOR_MFR_MICRON		CFI_MFR_MICRON	/* Micron */
 #define SNOR_MFR_MACRONIX	CFI_MFR_MACRONIX
-- 
1.9.1