[0/5] ONIE tlv nvmem layout support

Message

Miquel Raynal Oct. 28, 2022, 9:23 a.m. UTC

Hello,

Here is a series bringing support for an NVMEM layout parser. The table
that will get processed has been standardized by the ONIE project [1]
and its content is highly dependent on the manufacturer choices. There
is a dedicated process to read it, but in no case we can define the
nvmem cells location/length statically in the DT like other NVMEM
cells. Instead, we need what the "layout" abstraction proposed here [2]
brings: a dynamic way to find and export NVMEM cells. So this series is
actually dependent on [2] and cannot be merged without it.

The mvpp2 patch is an example of use which was useful to me during my
test runs, so I figured out it might make sense to upstream it. I am not
100% convinced this is the right way so reviews there are welcome.

[1] https://opencomputeproject.github.io/onie/design-spec/hw_requirements.html
[2] https://lore.kernel.org/linux-arm-kernel/20220921115813.208ff789@xps-13/T/

Cheers,
Miquèl

Miquel Raynal (5):
  dt-bindings: vendor-prefixes: Add ONIE
  dt-bindings: nvmem: add YAML schema for the ONIE tlv layout
  nvmem: layouts: Add ONIE tlv layout driver
  MAINTAINERS: Add myself as ONIE tlv NVMEM layout maintainer
  net: mvpp2: Consider NVMEM cells as possible MAC address source

 .../nvmem/layouts/onie,tlv-layout.yaml        |  96 +++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   6 +
 .../net/ethernet/marvell/mvpp2/mvpp2_main.c   |   6 +
 drivers/nvmem/layouts/Kconfig                 |   9 +
 drivers/nvmem/layouts/Makefile                |   1 +
 drivers/nvmem/layouts/onie-tlv.c              | 240 ++++++++++++++++++
 7 files changed, 360 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
 create mode 100644 drivers/nvmem/layouts/onie-tlv.c