Mailbox property: RPI_FIRMWARE_GET_CUSTOMER_OTP
stefan.wahren at i2se.com
Thu Dec 28 09:50:50 PST 2017
i made an attempt to write an NVMEM / OTP driver for the Raspberry Pi . Instead of accessing the registers from the ARM core i decided to use the Mailbox property interface of the GPU firmware. Unfortunately a documentation of property RPI_FIRMWARE_GET_CUSTOMER_OTP isn't available here .
So the following questions comes to my mind:
What is the proper definition of Request/Response?
How long is the OTP register range in bytes?
Can anyone help?
 - https://github.com/lategoodbye/rpi-zero/tree/bcm2835-otp
 - https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface
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