Messages in this thread | | | From | Sagar Shrikant Kadam <> | Subject | [PATCH v2 0/3] add support for is25wp256 spi-nor device. | Date | Sun, 28 Apr 2019 23:39:13 +0530 |
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The patch set is tested on HiFive Unleashed board and is based on mainline kernel v 5.1-rc5. 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.
With issi_lock and unlock schemes support for block protection is added in patch 2 and 3. These patches are extended from base work done in a patch at following commit: https://github.com/riscv/riscv-linux/commit/c94e267766d62bc9a669611c3d0c8ed5ea26569b
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_lock :Lock flash memory blocks. 4. flash_unlock: Unlock flash memory blocks.
Unlock scheme clears the bit protection bits of all blocks in the Status register. Lock schemes in patch 3 is based on stm_lock mechanism. With current implementation entire flash memory gets protected.
Block protection schemes are tested with flash_lock and unlock utils.
Revision history: V1<-> V2: -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.
v1: -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 | 116 +++++++++++++++++++++++++++++++++++++++++- include/linux/mtd/spi-nor.h | 2 + 2 files changed, 117 insertions(+), 1 deletion(-)
-- 1.9.1
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