[PATCH 0/7] Support exposing bits of any byte as NVMEM cells

[Sven Peter via B4 Relay <devnull+sven.svenpeter.dev@kernel.org>]

Hi,

I'm preparing USB3 support for Apple Silicon Macs for upstreaming right
now and this series is the first dependency. The Type-C PHY requires
configuration values encoded in fuses for which we already have a
driver.
Unfortunately, the fuses on these machines are only accessibly as 32bit
words but the Type-C PHY configuration values are individual bits which
are sometimes spread across multiple fuses.
Right now this is not supported by the nvmem core which only allows a
subset of bits within the first byte to be exposed as a nvmem cell. This
small series adds support for exposing arbitrary bits as nvmem cells.

The second part of the series then adds the nvmem cells required for the
Type-C PHY to our device trees. While it's technically independent I've
included those changes in this series for context.

Best,

Sven

Signed-off-by: Sven Peter <sven@svenpeter.dev>
---
Janne Grunau (2):
      Revert "nvmem: core: Print error on wrong bits DT property"
      arm64: dts: apple: t8112: Add eFuses node

R (1):
      arm64: dts: apple: t600x: Add eFuses node

Sven Peter (4):
      nvmem: core: allow bit offset > 8
      nvmem: core: round up to word_size
      dt-bindings: nvmem: apple: Add T8112 compatible
      arm64: dts: apple: t8103: Add eFuses node

 .../devicetree/bindings/nvmem/apple,efuses.yaml    |   1 +
 arch/arm64/boot/dts/apple/t600x-dieX.dtsi          | 187 +++++++++++++++++++++
 arch/arm64/boot/dts/apple/t8103.dtsi               | 102 +++++++++++
 arch/arm64/boot/dts/apple/t8112.dtsi               |  97 +++++++++++
 drivers/nvmem/core.c                               |  24 +--
 5 files changed, 401 insertions(+), 10 deletions(-)
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250508-nvmem-dt-de1a1842e883

Best regards,
-- 
Sven Peter <sven@svenpeter.dev>