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Subject[PATCH v2 1/1] mtd: spi-nor: micron-st: Enable locking for n25q256ax1/mt25qu256a
Date
n25q256ax1 [1] and mt25qu256a [2] (both have same jedec_id - 0x20bb19)
use the 4 bit Block Protection scheme and support Top/Bottom protection
via the BP and TB bits of the Status Register.
BP3 is located in bit 6 of the Status Register.
Tested on both n25q256ax1 and mt25qu256a.

[1] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/n25q/n25q_256mb_3v.pdf
[2] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/mt25q/die-rev-a/mt25q_qljs_u_256_aba_0.pdf

Signed-off-by: Eliav Farber <farbere@amazon.com>
---
xxd -p /sys/devices/platform/soc/fd882000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp
53464450060101ff00060110300000ff84000102800000ffffffffffffff
ffffffffffffffffffffffffffffffffffffe520fbffffffff0f29eb276b
273b27bbffffffffffff27bbffff29eb0c2010d80f520000244a99008b8e
03d4ac0127387a757a75fbbdd55c4a0f82ff81bd3d36ffffffffffffffff
ffffffffffffffffffe7ffff21dcffff

md5sum /sys/devices/platform/soc/fd882000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp
5ea738216f68c9f98987bb3725699a32 /sys/devices/platform/soc/fd882000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp

cat /sys/devices/platform/soc/fd882000.spi/spi_master/spi0/spi0.0/spi-nor/jedec_id
20bb19104400

cat /sys/devices/platform/soc/fd882000.spi/spi_master/spi0/spi0.0/spi-nor/partname
mt25qu256a

cat /sys/devices/platform/soc/fd882000.spi/spi_master/spi0/spi0.0/spi-nor/manufacturer
st

v2 --> v1:
- Enable locking also for mt25qu256a.
- Dump the SFDP tables.

drivers/mtd/spi-nor/micron-st.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index 3c9681a3f7a3..f4d0153a5b1b 100644
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -201,11 +201,15 @@ static const struct flash_info st_nor_parts[] = {
MFR_FLAGS(USE_FSR)
},
{ "mt25qu256a", INFO6(0x20bb19, 0x104400, 64 * 1024, 512)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_4BIT_BP |
+ SPI_NOR_BP3_SR_BIT6)
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
MFR_FLAGS(USE_FSR)
},
{ "n25q256ax1", INFO(0x20bb19, 0, 64 * 1024, 512)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_4BIT_BP |
+ SPI_NOR_BP3_SR_BIT6)
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_QUAD_READ)
MFR_FLAGS(USE_FSR)
},
--
2.37.1
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