SPI NOR core changes:
- Add non-uniform erase fixes.
- Add Global Block Unlock command. It is defined by few flash
  vendors, and it is used for now just by sst.

SPI NOR controller drivers changes:
- intel-spi: Add support for Intel Alder Lake-P SPI serial flash.
- hisi-sfc: Put child node np on error path.
mtd: spi-nor: sst: Add support for Global Unlock on sst26vf

Even if sst26vf shares the SPINOR_OP_GBULK opcode with
Macronix (ex. MX25U12835F) and Winbound (ex. W25Q128FV),
it has its own Individual Block Protection scheme, which
is also capable to read-lock individual parameter blocks.
Thus the sst26vf's Individual Block Protection scheme will
reside in the sst.c manufacturer driver.

Add support to unlock the entire flash memory. The device
is write-protected by default after a power-on reset cycle
(volatile software protection), in order to avoid inadvertent
writes during power-up. Could do an erase, write, read back,
and compare when MTD_SPI_NOR_SWP_DISABLE_ON_VOLATILE=y.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20210121110546.382633-2-tudor.ambarus@microchip.com
3 files changed