On Sun, 2020-09-20 at 11:14:44 UTC, Serge Semin wrote: > Baikal-T1 Boot Controller provides an access to a RO storages, which are > physically mapped into the SoC MMIO space. In particularly there are > Internal ROM embedded into the SoC with a pre-installed firmware, > externally attached SPI flash (also accessed in the read-only mode) and a > memory region, which mirrors one of them in accordance with the currently > enabled system boot mode (also called Boot ROM). > > This commit adds the Internal ROM support to the physmap driver of the MTD > kernel subsystem. The driver will create the Internal ROM MTD as long as > it is defined in the system dts file. The physically mapped SPI flash > region will be used to implement the SPI-mem interface. The mirroring > memory region won't be accessible directly since it's redundant due to > both bootable regions being exposed anyway. > > Note we had to create a dedicated code for the ROMs since read from the > corresponding memory regions must be done via the dword-aligned addresses. > > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> > Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx> > Cc: Pavel Parkhomenko <Pavel.Parkhomenko@xxxxxxxxxxxxxxxxxxxx> > Cc: Lee Jones <lee.jones@xxxxxxxxxx> > Cc: linux-mips@xxxxxxxxxxxxxxx Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks. Miquel
