Re: [PATCH v2 01/14] dt-bindings: remoteproc: Add TI PRUSS bindings

From: Suman Anna
Date: Wed Feb 13 2019 - 21:48:14 EST

On 2/6/19 9:04 AM, Roger Quadros wrote:
> On 05/02/19 18:19, Tony Lindgren wrote:
>> * Murali Karicheri <m-karicheri2@xxxxxx> [190205 16:13]:
>>> On 02/05/2019 10:41 AM, Roger Quadros wrote:
>>>> What I'm suggesting here is that kernel remoteproc driver should have nothing to do
>>>> with the other PRU's data RAM.
>>>> The application driver if needs both PRUs then it can obviously access both DRAMs
>>>> as it has a phandle to both PRUs.
>>> That should be fine.
>> That sounds good to me too.
>> For dts, yeah please allocate the resources for the modules
>> where the resources belong to on the PRUSS internal interconnect :)
>> Devices can move around on the interconnect between SoCs and the
>> modules can get swapped or added.
> If you take a look at "Figure 30-1. PRU-ICSS Overview" in
> You can see that DRAM0 and DRAM1 are not part of PRU. That means
> they shouldn't be in the PRU node then.

Yes, they do not belong to a PRU, and should not be defined underneath
one. Both are accessible from both PRU cores, so it is upto the
application on how they can partition the usage.