[PATCH 0/7] Add Aspeed AST2700 SDRAM EDAC support

Add ECC error reporting for the Aspeed AST2700 SoC to the existing
aspeed_edac driver.

The AST2700 memory controller keeps the same overall EDAC programming
model as the earlier Aspeed BMC SoCs, but uses a different register
layout, a split interrupt status/clear/mask scheme and DDR4/DDR5 memory.
Rather than fork the driver, the existing code is first tidied and
generalised, then the AST2700 is added as one more per-SoC variant.

The series is organised as:

 - dt-bindings: document the new "aspeed,ast2700-sdram-edac" compatible;
 - set dimm->grain to the controllers' ECC granularity, fixing a
   pre-existing WARN_ON in the EDAC core on the first reported error
   (carries a Fixes: tag and Cc: stable);
 - clean up whitespace and include ordering so the following changes
   start from a consistent style;
 - free the mem_ctl_info unconditionally on remove, dropping a NULL
   check on a value that cannot be NULL there;
 - drop the regmap, which serves only as an MMIO wrapper here,
   in favour of direct readl()/writel() under an explicit raw spinlock,
   annotating the register base with __guarded_by() so that the locking
   is checked at build time under CONFIG_WARN_CONTEXT_ANALYSIS;
 - abstract the SoC-specific details (register layout, ECC/DRAM-type
   bits, memory types, write-protection key) behind per-SoC chip data;
 - add the AST2700 support, teaching the shared error-reporting helpers
   to report an error without an address for its single shared
   failure-address register.

Tested with the memory controller's ECC error injection on both an
existing SoC and the new one:

 - AST2600: an injected correctable error is reported through the EDAC
   interface as a CE with the recorded failure address, confirming the
   regmap removal and the chip-data refactor do not regress the existing
   controllers.

 - AST2700: an injected correctable error is likewise reported as a CE
   with the expected failure address.

Signed-off-by: Ryan Chen <[email protected]>
---
Ryan Chen (7):
      dt-bindings: edac: aspeed: Add AST2700 SDRAM EDAC
      EDAC/aspeed: Set the DIMM grain
      EDAC/aspeed: Clean up whitespace and include ordering
      EDAC/aspeed: Free the mem_ctl_info unconditionally on remove
      EDAC/aspeed: Replace regmap with direct register access
      EDAC/aspeed: Abstract SoC differences behind chip data
      EDAC/aspeed: Add AST2700 support

 .../bindings/edac/aspeed,ast2400-sdram-edac.yaml   |   6 +-
 drivers/edac/aspeed_edac.c                         | 414 +++++++++++++--------
 2 files changed, 268 insertions(+), 152 deletions(-)
---
base-commit: 5464985e42c04e335fb30e38fbc409c997db9bec
change-id: 20260625-edac-8e960e02e7f7

Best regards,
-- 
Ryan Chen <[email protected]>