[PATCH v4 0/5] nvmem: Add Raspberry Pi OTP nvmem driver

[Gregor Herburger]

Hi,

This series adds support for the Raspberry Pis OTP registers. The
Raspberry Pi has one or more OTP regions. These registers are accessible
through the firmware. Add a driver for it and add updates the devicetree
for the Raspberry Pi 5.

---
Changes in v4:
- Additional patch to drop unnecessary select schema
- fix dt-bindings
- use __counted_by_le
- additional alignment check in read/write callbacks
- Link to v3: https://patch.msgid.link/20260506-rpi-otp-driver-v3-0-294602663695@linutronix.de

Changes in v3:
- dts: add "raspberrypi,bcm2835-firmware" as fallback and fix dt-bindings
- Fix Kconfig depends
- Changed firmware data fields to __le32
- Add MODULE_ALIAS
- Link to v2: https://patch.msgid.link/20260505-rpi-otp-driver-v2-0-e9176ec72837@linutronix.de

Changes in v2:
- register nvmem driver from firmware driver and drop firmware sub nodes
- Use struct_size and __counted_by for dynamic array
- Drop unneeded comment in Kconfig
- Use NVMEM_DEVID_NONE
- Use kzalloc
- Update module description
- Link to v1: https://patch.msgid.link/20260408-rpi-otp-driver-v1-0-e02d1dbe6008@linutronix.de

---
Gregor Herburger (5):
      dt-bindings: raspberrypi,bcm2835-firmware: Add bcm2712-firmware compatible
      nvmem: Add the Raspberry Pi OTP driver
      firmware: raspberrypi: register nvmem driver
      arm64: dts: broadcom: bcm2712: add raspberrypi,bcm2712-firmware compatible
      dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select

 .../arm/bcm/raspberrypi,bcm2835-firmware.yaml      |  20 ++--
 .../boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi    |   4 +-
 drivers/firmware/raspberrypi.c                     |  59 +++++++++-
 drivers/nvmem/Kconfig                              |  10 ++
 drivers/nvmem/Makefile                             |   1 +
 drivers/nvmem/raspberrypi-otp.c                    | 130 +++++++++++++++++++++
 include/soc/bcm2835/raspberrypi-firmware.h         |  14 +++
 7 files changed, 224 insertions(+), 14 deletions(-)
---
base-commit: f3e6330d7fe42b204af05a2dbc68b379e0ad179e
change-id: 20260408-rpi-otp-driver-75fce1dcff7d

Best regards,
--  
Gregor Herburger <gregor.herburger at linutronix.de>