[PATCH] mtd: spi: Add ISSI QSPI to lightweight SPI flash stack for spl

[Jit Loon Lim]

From: "Lokanathan, Raaj" <raaj.lokanathan at intel.com>

Add support for reading data/images from this ISSI QSPI flash.

Signed-off-by: Lokanathan, Raaj <raaj.lokanathan at intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim at intel.com>
---
 drivers/mtd/spi/spi-nor-tiny.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi/spi-nor-tiny.c b/drivers/mtd/spi/spi-nor-tiny.c
index 68152ce3b4..6a5da38cb1 100644
--- a/drivers/mtd/spi/spi-nor-tiny.c
+++ b/drivers/mtd/spi/spi-nor-tiny.c
@@ -219,6 +219,7 @@ static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
 	case SNOR_MFR_MICRON:
 		/* Some Micron need WREN command; all will accept it */
 		need_wren = true;
+	case SNOR_MFR_ISSI:
 	case SNOR_MFR_MACRONIX:
 	case SNOR_MFR_WINBOND:
 		if (need_wren)
@@ -432,7 +433,7 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
 	return -ENOTSUPP;
 }
 
-#ifdef CONFIG_SPI_FLASH_MACRONIX
+#if defined(CONFIG_SPI_FLASH_MACRONIX) || defined(CONFIG_SPI_FLASH_ISSI)
 /**
  * macronix_quad_enable() - set QE bit in Status Register.
  * @nor:	pointer to a 'struct spi_nor'
@@ -661,8 +662,9 @@ static int spi_nor_setup(struct spi_nor *nor, const struct flash_info *info,
 	/* Enable Quad I/O if needed. */
 	if (spi_nor_get_protocol_width(nor->read_proto) == 4) {
 		switch (JEDEC_MFR(info)) {
-#ifdef CONFIG_SPI_FLASH_MACRONIX
+#if defined(CONFIG_SPI_FLASH_MACRONIX) || defined(CONFIG_SPI_FLASH_ISSI)
 		case SNOR_MFR_MACRONIX:
+		case SNOR_MFR_ISSI:
 			err = macronix_quad_enable(nor);
 			break;
 #endif
-- 
2.26.2