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.