[RFC PATCH 0/7] EDAC drivers for Armada XP L2 and DDR

[Jan Luebbe]

This series add drivers for the L2 cache and DDR RAM ECC functionality as found
on the MV78230/MV78x60 SoCs. I've tested these changes with the MV78460 (on a
custom board with a DDR3 ECC DIMM).

Also contained in this series are devm_ helpers for edac_mc_/edac_device_
allocation and registration, which make error handing and cleanup simpler. They
may already be mergeable.

It seems Chris and I had a race condition, he posted a driver for this
functionality just yesterday. Compared to his submission, the L2 and DDR
support is split into two drivers for this series, as they don't actually share
any functionality.

Some further differences in this series are:
- The error details are decoded and passed to the edac error handler.
- Multiple errors are counted even if the details are unavailable.
- The DDR RAM configuration is read back to fill out the DIMM structures.
- The DDR RAM error address is calculated from the bank/row/col information.
- The L2 injection registers are exposed via debugfs instead of sysfs
  (resulting in less driver code).

Chris, how do you want to proceed? We should probably combine our efforts in one
series. I've already picked up part of DDR RAM config reading from your series
for this submission. I'll send some questions/comments to your series, as well.

Jan Luebbe (7):
  ARM: l2c: move cache-aurora-l2.h to asm/hardware
  ARM: aurora-l2: add prefix to MAX_RANGE_SIZE
  EDAC: Add missing debugfs_create_x32 wrapper
  EDAC: Add devres helpers for
    edac_mc_alloc/edac_mc_add_mc(_with_groups)
  EDAC: Add devres helpers for
    edac_device_alloc_ctl_info/edac_device_add_device
  EDAC: Add driver for the AURORA L2 cache
  EDAC: Add driver for the Marvell Armada XP SDRAM controller

 arch/arm/include/asm/hardware/cache-aurora-l2.h | 104 +++++++
 arch/arm/mm/cache-aurora-l2.h                   |  55 ----
 arch/arm/mm/cache-l2x0.c                        |   6 +-
 drivers/edac/Kconfig                            |  14 +
 drivers/edac/Makefile                           |   2 +
 drivers/edac/armada_xp_mc_edac.c                | 366 ++++++++++++++++++++++++
 drivers/edac/aurora_l2_edac.c                   | 252 ++++++++++++++++
 drivers/edac/debugfs.c                          |  11 +
 drivers/edac/edac_device.c                      |  59 ++++
 drivers/edac/edac_device.h                      |  29 ++
 drivers/edac/edac_mc.c                          |  53 ++++
 drivers/edac/edac_mc.h                          |  26 ++
 drivers/edac/edac_module.h                      |   5 +
 13 files changed, 924 insertions(+), 58 deletions(-)
 create mode 100644 arch/arm/include/asm/hardware/cache-aurora-l2.h
 delete mode 100644 arch/arm/mm/cache-aurora-l2.h
 create mode 100644 drivers/edac/armada_xp_mc_edac.c
 create mode 100644 drivers/edac/aurora_l2_edac.c

-- 
2.11.0