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Correct IMX8 processor reference manual?

Question asked by Jason Cole on Sep 16, 2019
Latest reply on Sep 20, 2019 by Rita Wang

I have downloaded the IMX8 processor reference manual in order to access some of the GPIO registers in a device driver.

The document I used was this one:

https://www.nxp.com/docs/en/reference-manual/IMX8DQXPRM.pdf 

 

According to the above, the GPIO registers are in the region of 0x5D080000, however attempting to access them causes GPFs.

I consulted a manual for the IMX7 where the registers are in the region of 0x30200000 and they appear to work.


The CPU is on a SOM made by Compulab; the cl-som-imx8

 

The cpuinfo on the target displays 4 processors:

# cat /proc/cpuinfo
processor : 0
BogoMIPS : 16.66
Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4

 

Are there variations amongst the IMX8 family or is there a different reference manual available?

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