The VC4 firmware exposes a mailbox interface that allows the ARM core to access only the customer part of the OTP memory. This version brings read-only support, but could also be extended to write support. I think this driver could be helpful for vendors, which integrate the Raspberry Pi Compute Module in their products. This series depends on commit "soc: bcm2835: sync firmware properties with downstream". Stefan Wahren (3): dt-bindings: nvmem: add binding for Raspberry Pi OTP nvmem: add driver for Raspberry Pi OTP ARM: dts: bcm2835-rpi: Enable OTP access for Raspberry Pi .../nvmem/raspberrypi,bcm2835-customer-otp.txt | 27 ++++ arch/arm/boot/dts/bcm2835-rpi.dtsi | 6 + drivers/nvmem/Kconfig | 10 ++ drivers/nvmem/Makefile | 2 + drivers/nvmem/raspberrypi-otp.c | 138 +++++++++++++++++++++ 5 files changed, 183 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/raspberrypi,bcm2835-customer-otp.txt create mode 100644 drivers/nvmem/raspberrypi-otp.c -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
