On Tue, Oct 13, 2020 at 02:50:30PM +0200, Sascha Hauer wrote:

This driver is based on an earlier version from York Sun which can
be found here: https://lkml.org/lkml/2018/3/14/1203.

At that time the conclusion was that this driver is not suitable for
mainline as it used IMPLEMENTATION DEFINED CPU registers and also
NXP specific SMC calls. All this was used for the error injection only,
for error reporting it is not needed.

Have you looked at Amazon's version:
http://lore.kernel.org/r/20200510151310.17372-2-hhhawa@amazon.com (local)

Which is an A57 EDAC driver. Looks like it never got upstream though, 
but it's not clear why.

You'll note that it doesn't have a virtual DT node either.

This is another try to get this driver to mainline. All error injection
code has been removed (though it has initially been used to test this
driver on an i.MX8 SoC), what's left is unfortunately not testable, but
also doesn't contain none of the doubtful code anymore.

Changes since v1:
- Split dt-binding into separate patch
- Sort local function variables in reverse-xmas tree order
- drop unnecessary comparison and make variable bool

Sascha Hauer (2):
  dt-bindings: edac: Add binding for L1/L2 error detection for Cortex
    A53/57
  drivers/edac: Add L1 and L2 error detection for A53 and A57

York Sun (1):
  arm64: dts: ls104x: Add L1/L2 cache edac node

 .../bindings/edac/arm,cortex-a5x-edac.yaml    |  32 +++
 .../arm64/boot/dts/freescale/fsl-ls1043a.dtsi |   5 +
 .../arm64/boot/dts/freescale/fsl-ls1046a.dtsi |   5 +
 drivers/edac/Kconfig                          |   6 +
 drivers/edac/Makefile                         |   1 +
 drivers/edac/cortex_arm64_l1_l2.c             | 208 ++++++++++++++++++
 6 files changed, 257 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/edac/arm,cortex-a5x-edac.yaml
 create mode 100644 drivers/edac/cortex_arm64_l1_l2.c

-- 
2.28.0

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