Verify iomux settings on iMX8QM

[ottob]

Hi There !

How do I verify the iomux settings of a pin ? I can see the offset in the processor reference manual, but its unclear to me what the base address is. Would have been pretty handy to have absolute addresses in the document 

Thanks, 

/Otto

[joanxie]

you can refer to the chapter 2.2.2 HSIO / LSIO Memory Maps of reference manual,

and refer to the reference manual, IOMUXD is programmed through the System Controller API
and is not programmed directly. The register information below
is for reference only.

[ottob]

Hi Joanxie !

Does this mean the IOMUX registers are not accessible from the A72 ? Or they are read only ? 

Thanks for you help,

/Otto

[joanxie]

for linux, the latest document move here:

https://source.codeaurora.org/external/imx/linux-imx/tree/Documentation/devicetree/bindings/arm/free...

[joanxie · Accepted solution]

pls refer to this document, which is useful for your question

"https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/System-Controller-Firmware-101-Pad-confi..."

[ottob]

Thanks Joanxie ! That is very helpful