On Wed, Apr 05, 2023 at 12:48:35PM +0200, Konrad Dybcio wrote: > The MPM hardware is accessible to us from the ARM CPUs through a shared > memory region (RPM MSG RAM) that's also concurrently accessed by other > kinds of cores on the system (like modem, ADSP etc.). Modeling this > relation in a (somewhat) sane manner in the device tree basically > requires us to either present the MPM as a child of said memory region > (which makes little sense, as a mapped memory carveout is not a bus), > define nodes which bleed their register spaces into one another, or > passing their slice of the MSG RAM through some kind of a property. > > Go with the third option and add a way to map a region passed through > the "qcom,rpm-msg-ram" property as our register space. > > The current way of using 'reg' is preserved for ABI reasons. > > Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> Acked-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
