This patchset adds basic support for the MIPS Common Device Memory Map
Memory (CDMM) region in the form of a bus in the standard Linux device
Since the CDMM region is a feature of the MIPS architecture (since
around MIPSr2) the first patch adds the necessary definitions and
probing to arch/mips.
The second patch adds the actual bus driver (see that patch for lots
The final patch just enables CDMM to work on Malta.
Futher patches will follow soon to add TTY/Console/KGDB support for the
EJTAG Fast Debug Channel (FDC) device which is found in the CDMM region.
Changes in v2:
- Fix typo in definition of MIPS_CPU_CDMM, s/0ll/ull (Maciej).
- Fix some checkpatch errors.
- Correct CDMM name in various places. It is "Common Device Memory Map",
rather than "Common Device Mapped Memory" (which for some reason had
got stuck in my head).
Cc: Ralf Baechle <email@example.com>
Cc: Greg Kroah-Hartman <firstname.lastname@example.org>
James Hogan (3):
MIPS: Add arch CDMM definitions and probing
MIPS: Add CDMM bus support
MIPS: Malta: Implement mips_cdmm_phys_base()
arch/mips/include/asm/cdmm.h | 87 +++++
arch/mips/include/asm/cpu-features.h | 4 +
arch/mips/include/asm/cpu.h | 1 +
arch/mips/include/asm/mipsregs.h | 11 +
arch/mips/kernel/cpu-probe.c | 2 +
arch/mips/mti-malta/malta-memory.c | 7 +
drivers/bus/Kconfig | 13 +
drivers/bus/Makefile | 1 +
drivers/bus/mips_cdmm.c | 711 +++++++++++++++++++++++++++++++++++
include/linux/mod_devicetable.h | 8 +
scripts/mod/devicetable-offsets.c | 3 +
scripts/mod/file2alias.c | 16 +
12 files changed, 864 insertions(+)
create mode 100644 arch/mips/include/asm/cdmm.h
create mode 100644 drivers/bus/mips_cdmm.c