[PATCH v2 00/15] NVMEM: Add support for layout drivers

[Marco Felsch]

Hi,

with this patchset the barebox nvmem-core is prepared for the Linux
nvmem-layout drivers. Layout drivers are used to describe the NVMEM
storage format. The patchset also adds the support to read nvmem-cells
via the devfs. This makes it possible to read the cells from the board
code or shell without the need of referencing the cells within the DT.

A long with the alignment and feature work I fixed a few issues like:
honor the DT alias for a nvmem provider correctly.

For the new features to work correctly the NVMEM core had to be partly
(re-)synced with the one from Linux. This involved porting different DT
helpers.

Unfortunately this patchset doesn't add a NVMEM layout driver therefore
a __dummy__.o is added within the Makefile.

I decided to start from a fresh v1 because of the rework I've done. But
for reference, the previous patchset can be found here:

 - https://lore.kernel.org/barebox/20240613131531.364894-1-m.felsch@pengutronix.de/

Regards,
  Marco

---
Changes in v2:
- Link to v1: https://lore.barebox.org/20250804-v2025-06-0-topic-nvmem-v1-0-7603eaa4d2b0@pengutronix.de
- rebased ontop of current master to resolve merge conflict

---
Marco Felsch (15):
      of: sync of_*_phandle_with_args with Linux
      of: base: add of_parse_phandle_with_optional_args()
      of: device: Export of_device_make_bus_id()
      nvmem: core: fix nvmem_register error path
      nvmem: core: sync with Linux
      nvmem: core: expose nvmem cells as cdev
      nvmem: core: allow single and dynamic device ids
      eeprom: at24: fix device name handling
      nvmem: core: create a header for internal sharing
      nvmem: core: add nvmem-layout support
      nvmem: core: add an index parameter to the cell
      nvmem: core: add per-cell post processing
      nvmem: core: add cell based fixup logic
      nvmem: core: provide own priv pointer in post process callback
      nvmem: core: drop global cell_post_process

 drivers/eeprom/at24.c          |  18 +-
 drivers/nvmem/Kconfig          |   7 +
 drivers/nvmem/Makefile         |   3 +
 drivers/nvmem/core.c           | 691 ++++++++++++++++++++++++++++++-----------
 drivers/nvmem/imx-ocotp-ele.c  |  12 +-
 drivers/nvmem/internals.h      |  55 ++++
 drivers/nvmem/layouts.c        | 173 +++++++++++
 drivers/nvmem/layouts/Kconfig  |  13 +
 drivers/nvmem/layouts/Makefile |   7 +
 drivers/nvmem/ocotp.c          |  12 +-
 drivers/nvmem/regmap.c         |   5 +-
 drivers/of/base.c              | 280 +++++++++++------
 drivers/of/device.c            |  37 +++
 drivers/of/platform.c          |  36 +--
 include/linux/nvmem-consumer.h |  17 +-
 include/linux/nvmem-provider.h | 148 ++++++++-
 include/of.h                   | 146 ++++++++-
 include/of_device.h            |   3 +
 18 files changed, 1295 insertions(+), 368 deletions(-)
---
base-commit: 6e3b27f11772b42da310050d459fd104748867bc
change-id: 20250701-v2025-06-0-topic-nvmem-c747b64106e2

Best regards,
-- 
Marco Felsch <m.felsch at pengutronix.de>