Many SPI NOR flash devices support status register protection through one or two status register protection bits. Protection of the status register is essential in defending the device from rogue software which may attempt to modify block protection bits in order to make malicious modifications to the data stored in flash. This patch series adds status register protect support for STMICRO, SST, Winbond and Spansion devices and also implements an sf sub-command to set the used protection method.
George McCollister (5): sf: Add status register protection mechanism sf: Add status register protect for STMICRO, SST sf: Use stm_lock/unlock for Spansion and Winbond sf: Add status register protect for Winbond sf: Add sr-protect sub-command
cmd/sf.c | 28 ++++++++++++ drivers/mtd/spi/sf_internal.h | 2 + drivers/mtd/spi/spi_flash.c | 103 +++++++++++++++++++++++++++++++++++++++++- include/spi_flash.h | 17 +++++++ 4 files changed, 149 insertions(+), 1 deletion(-)