On 28/12/17 21:29, Mathieu Malaterre wrote:

This patchset bring support for read-only access to the JZ4780 efuse as found
on MIPS Creator CI20.

To keep the driver as simple as possible, it was not possible to re-use most of
the nvmem core functionalities. This driver is not compatible with the original

Can you explain a bit more on not able to re-use nvmem core?

If you are referring to adding nvmem cell entires in sysfs, This should 
probably go in to nvmem core, rather that in individual providers.
This is one of the feature my todo list, will try to come up with some 
thing soon.

thanks,
srini

efuse driver as found in the custom linux kernel from upstream (1), in
particular it does not expose to the users neither:
`/sys/devices/platform/*/chip_id` nor `/sys/devices/platform/*/user_id`.

The goal of this driver is to provide access to the MAC address to the dm9000
driver.

(1) https://github.com/ZubairLK/CI20_linux/commit/6efd4ffca7dcfaff0794ab60cd6922ce96c60419

Changes in v2:
Properly handle offset and byte value from the main entry point.
Also add a commit message in patch #2.

Mathieu Malaterre (1):
   dts: Probe efuse for CI20

PrasannaKumar Muralidharan (1):
   nvmem: add driver for JZ4780 efuse

  .../ABI/testing/sysfs-driver-jz4780-efuse          |  16 ++
  .../bindings/nvmem/ingenic,jz4780-efuse.txt        |  17 ++
  MAINTAINERS                                        |   5 +
  arch/mips/boot/dts/ingenic/jz4780.dtsi             |  40 ++-
  arch/mips/configs/ci20_defconfig                   |   2 +
  drivers/nvmem/Kconfig                              |  10 +
  drivers/nvmem/Makefile                             |   2 +
  drivers/nvmem/jz4780-efuse.c                       | 305 +++++++++++++++++++++
  8 files changed, 385 insertions(+), 12 deletions(-)
  create mode 100644 Documentation/ABI/testing/sysfs-driver-jz4780-efuse
  create mode 100644 Documentation/devicetree/bindings/nvmem/ingenic,jz4780-efuse.txt
  create mode 100644 drivers/nvmem/jz4780-efuse.c