* [PATCH v3 v3 0/3] add support for is25wp256 spi-nor device.
@ 2019-05-07 15:46 Sagar Shrikant Kadam
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From: Sagar Shrikant Kadam @ 2019-05-07 15:46 UTC (permalink / raw)
To: marek.vasut, tudor.ambarus, dwmw2, computersforpeace, bbrezillon,
richard, palmer, aou, paul.walmsley, linux-mtd, linux-kernel,
Cc: Sagar Shrikant Kadam
The patch set is tested on HiFive Unleashed board and is based on mainline
kernel v5.1. Its intended to add support for 32 MB spi-nor flash
mounted on the board. Memory Device supports 4/32/and 64 KB sectors size.
The device id table is updated accordingly.
Flash parameter table for ISSI device is set to use macronix_quad_enable
procedure to set the QE (quad-enable) bit of Status register.
A unilaterlay block unlocking scheme is added in patch 2.
These patches are based on original work done by Wesley Terpstra and/or Palmer Dabbelt:
Erase/Read/Write operations are verified on HiFive Unleashed board using mtd and flash utils (v1.5.2):
1. mtd_debug :Options available are : erase/read/write.
2. flashcp :Single utility that erases flash, writes a file to flash and verifies the data back.
3. flash_unlock: Unlock flash memory blocks.
3. flash_lock: Lock flash memory blocks.
Unlock scheme clears the protection bits of all blocks in the Status register.
It is a basic implementation similar to stm_lock scheme and is validated for different number of blocks passed
-Rebased patch to mainline v5.1 from earlier v5.1-rc5
-Updated commit messages, and cover letter with reference to git URL and author information.
-Deferred flash_lock mechanism and can go as separate patch.
-Incorporated changes suggested by reviewers regarding patch/cover letter versioning, references of patch.
-Updated cover letter with description for flash operations verified with these changes.
-Add support for unlocking is25xxxxxx device
-Add support for locking is25xxxxxx device.
-Add support for is25wp256 device.
Sagar Shrikant Kadam (3):
mtd: spi-nor: add support for is25wp256
mtd: spi-nor: add support to unlock flash device.
mtd: spi-nor: add locking support for is25xxxxx device
drivers/mtd/spi-nor/spi-nor.c | 110 +++++++++++++++++++++++++++++++++++++++++-
include/linux/mtd/spi-nor.h | 2 +
2 files changed, 111 insertions(+), 1 deletion(-)
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2019-05-07 15:46 [PATCH v3 v3 0/3] add support for is25wp256 spi-nor device Sagar Shrikant Kadam
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