From: <Tudor.Ambarus@microchip.com>
To: <marek.vasut@gmail.com>, <vigneshr@ti.com>,
<boris.brezillon@collabora.com>, <miquel.raynal@bootlin.com>,
<richard@nod.at>, <linux-mtd@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Cc: Tudor.Ambarus@microchip.com
Subject: [PATCH 2/2] mtd: spi-nor: unlock global block protection on sst26vf064b
Date: Fri, 23 Aug 2019 16:05:04 +0000 [thread overview]
Message-ID: <20190823160452.14905-3-tudor.ambarus@microchip.com> (raw)
In-Reply-To: <20190823160452.14905-1-tudor.ambarus@microchip.com>
From: Tudor Ambarus <tudor.ambarus@microchip.com>
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@microchip.com>
---
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 08ae45fdc44a..5c18fd0c7fd2 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -2398,7 +2398,9 @@ 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
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next prev parent reply other threads:[~2019-08-23 16:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 16:05 [PATCH 0/2] mtd: spi-nor: add Global Block Unlock support Tudor.Ambarus
2019-08-23 16:05 ` [PATCH 1/2] " Tudor.Ambarus
2019-08-23 16:05 ` Tudor.Ambarus [this message]
2019-08-23 16:07 ` [PATCH 0/2] " Tudor.Ambarus
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