[PATCH 23/23] mtd: spi-nor: Unlock global block protection on sst26vf064b

From: Tudor.Ambarus
Date: Tue Sep 17 2019 - 11:56:02 EST


From: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>

To avoid inadvertent writes during power-up, sst26vf064b is
write-protected by default after a power-on reset cycle.
Unlock the serial flash memory by using the Global Block Protection
Unlock command - it offers a single command cycle that unlocks
the entire memory array.

Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
---
drivers/mtd/spi-nor/spi-nor.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 19556a9dd3fa..19919c9c1bd8 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -2442,7 +2442,9 @@ static const struct flash_info spi_nor_ids[] = {
{ "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
{ "sst26wf016b", INFO(0xbf2651, 0, 64 * 1024, 32, SECT_4K |
SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
- { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+ { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128,
+ SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+ UNLOCK_GLOBAL_BLOCK) },

/* ST Microelectronics -- newer production may have feature updates */
{ "m25p05", INFO(0x202010, 0, 32 * 1024, 2, 0) },
--
2.9.5