[PATCH 0/3] nvmem: Add Nuvoton NPCM OTP driver

Kuan-Wei Chiu <[email protected]> Wed, 18 Mar 2026 19:35:35 +0000

Newsgroups	org.ozlabs.lists.openbmc,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

Add support for the OTP memory controllers found on Nuvoton NPCM7 SoCs.

This OTP is read-only and manages two independent arrays: Key Storage
and Fuse Array, which contain cryptographic keys, hardware strapping,
and calibration data. Each array provides 1024 bytes of storage.

You can use qemu-system-arm -M npcm750-evb to play around with it.

Kuan-Wei Chiu (3):
  dt-bindings: nvmem: add nuvoton,npcm750-otp
  nvmem: npcm-otp: Add Nuvoton NPCM OTP driver
  ARM: dts: nuvoton: Add OTP nodes for NPCM7xx

 .../bindings/nvmem/nuvoton,npcm750-otp.yaml   |  35 +++++
 MAINTAINERS                                   |   7 +
 .../dts/nuvoton/nuvoton-common-npcm7xx.dtsi   |  10 ++
 drivers/nvmem/Kconfig                         |  10 ++
 drivers/nvmem/Makefile                        |   2 +
 drivers/nvmem/npcm-otp.c                      | 129 ++++++++++++++++++
 6 files changed, 193 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/nuvoton,npcm750-otp.yaml
 create mode 100644 drivers/nvmem/npcm-otp.c

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