Identify i.MX6 ULL variants via software

[lategoodbye]

According to the i.MX6 ULL Application Processor Data Sheet (chapter Ordering information) there are several variants of this processor available. Those could be identified by a part differentiator.

So my question, is there some kind of register to identify those variants via software?

[joanxie]

try to find the chapter 57.4.11 Chip Silicon Version (USB_ANALOG_DIGPROG) of imx6ull Reference Manual

https://www.nxp.com/docs/en/reference-manual/IMX6ULLRM.pdf 

[lategoodbye]

Hi Joan,

i don't need chip silicon version (Part A in part number nomenclature), but the part differentator (Part @) in order to know:

How many PWM/CAN/UART/SPI/... interfaces are supported?

Thanks

Stefan

[joanxie]

for the interface, you need to refer to the data sheet, different imx6ull chip should have different interface.

[lategoodbye]

Hi Joan,

you didn't get my intension. For example i want to write a production program which identifies the capabilities of the running processor. I guess these information are hidden in the OTP register.

Stefan

[evgenyboger · Accepted solution]

Turns out, manufacturer bootloader already does the job for you by identifying fused out peripherals and disabling them in Linux devicetree.

Here are the related parts of source code:

uboot-imx.git - Freescale i.MX u-boot Tree 

uboot-imx.git - Freescale i.MX u-boot Tree 

For some weird reason NXP won't openly share the OTP capability fuse table though it's available in the u-boot source cited above.