Re: [PATCH v2 3/7] ASoC: dt-bindings: fsl_rpmsg: Add binding doc for rpmsg cpu dai driver
From: Fabio Estevam
Date: Wed Feb 24 2021 - 22:11:46 EST
On Thu, Feb 18, 2021 at 4:21 AM Shengjiu Wang <shengjiu.wang@xxxxxxxxx> wrote:
>
> rpmsg is a protocol. What's the h/w block?
>
>
On Linux side this driver is a virtual driver, it is running
>
on Arm Cortex-A core. The h/w block is controlled by
>
another core (cortex-M core). so this driver actually
>
doesn't touch any hardware, it just does configuration
>
for rpmsg channel.
>
fsl,version: There are maybe different image running on M core, this
>
is the image version, different image has different function.
To answer Rob's question: the hardware block that handles these
messages is the Message Unit block.