This patch provides support to read a flash extended address register for winbond and stmicro SPI flashes.

Signed-off-by: Jagannadha Sutradharudu Teki jaganna@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