TDA4VM: GPIO resource isolation

看到e2e工程师已经回复您。

What I meant to ask is, does simply disabling the GPIO in the Linux device tree (or in RTOS) resolve the issue? Or do you completely want to block access to the GPIO from certain cores?

If you are wanting only a specific initiator (ex: MCU R5 ) to have access to the GPIO, you should be able to use the GPIO peripheral firewall. Please see section 3.3.4.2.1 (Peripheral Firewalls) in SPRUIL1C. The table in that section should give the firewall register base address (ex: GPIO0 = 0x45004000). Privilege IDs for different initiators can be found in section 3.3.4.1.2 (Priv ID and ISC Assignment) in SPRUIL1C. 

From a software implementation perspective, the following app note (section 4) mentions that the SysConfig tool could be used to assign firewalls and integrate it's output with SDKs. 

https://www.ti.com/lit/pdf/spracx6