This patch provides support to read a flash extended address
register for winbond and stmicro SPI flashes.
Signed-off-by: Jagannadha Sutradharudu Teki <jaga...@xilinx.com>
---
Changes for v2:
- none
drivers/mtd/spi/spi_flash.c | 2 ++
drivers/mtd/spi/spi_flash_internal.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 05d1792..66b6b14 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -321,6 +321,8 @@ int spi_flash_cmd_bankaddr_read(struct spi_flash *flash,
void *data)
if (idcode0 == 0x01) {
cmd = CMD_BANKADDR_BRRD;
+ } else if ((idcode0 == 0xef) || (idcode0 == 0x20)) {
+ cmd = CMD_EXTNADDR_RDEAR;
} else {
printf("SF: Unsupported bank addr read %02x\n", idcode0);
return -1;
diff --git a/drivers/mtd/spi/spi_flash_internal.h
b/drivers/mtd/spi/spi_flash_internal.h
index de1a0df..1b29e2d 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -32,6 +32,7 @@
#define CMD_BANKADDR_BRWR 0x17
#define CMD_BANKADDR_BRRD 0x16
#define CMD_EXTNADDR_WREAR 0xC5
+#define CMD_EXTNADDR_RDEAR 0xC8
/* Common status */
#define STATUS_WIP 0x01
--
1.8.3
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