Hi Robert, Thanks for the forwarding. > -----Original Message----- > From: Robert Schwebel [mailto:r.schwebel@xxxxxxxxxxxxxx] > Sent: Friday, June 1, 2018 4:34 PM > To: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> > Cc: Shawn Guo <shawnguo@xxxxxxxxxx>; Fabio Estevam > <fabio.estevam@xxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>; Mark > Rutland <mark.rutland@xxxxxxx>; linux-clk@xxxxxxxxxxxxxxx; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx; kernel@xxxxxxxxxxxxxx; > devicetree@xxxxxxxxxxxxxxx; A.s. Dong <aisheng.dong@xxxxxxx>; dl-linux- > imx <linux-imx@xxxxxxx> > Subject: Re: [PATCH v1 0/4] add mailbox support for i.MX7D > > On Fri, Jun 01, 2018 at 08:58:17AM +0200, Oleksij Rempel wrote: > > This patches are providing support for mailbox (Messaging Unit) for > > i.MX7D. Functionality was tested on PHYTEC phyBOARD-Zeta i.MX7D with > > Linux running on all cores: ARM Cortex-A7 and ARM Cortex-M4. > > Thanks for the patch. > > Both parts of i.MX messaging Unit are visible for all CPUs available > > on i.MX7D. Communication worked independent of MU side in > combination > > with CPU. For example MU-A used on ARM Cortex-A7 and MU-B used on > ARM > > Cortex-M4 or other ways around. > > > > The question to NXP developers: are there are limitations or > > recommendations about MU vs CPU combination? The i.MX7D > documentation > > talks about "Processor A" and "Processor B". It is not quite clear > > what processor it actually is (A7 or M4). The MU vs CPU combination usually are defined by HW design. It, MU Side A/B, can either be used by both CPU (A core and M core) or fixed to one side. For MX7D case, both side memory map can be accessed by both CPU Including Interrupt signals. But the recommendation is A core using MU side A and M core using MU side B. Regards Dong Aisheng > > Adding Dong Aisheng and NXP linux team to Cc:. > > rsc > -- > Pengutronix e.K. | | > Industrial Linux Solutions | > https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fww > w.pengutronix.de%2F&data=02%7C01%7Caisheng.dong%40nxp.com%7Cf53 > d9c9cdd744878740f08d5c79a7a1e%7C686ea1d3bc2b4c6fa92cd99c5c301635%7 > C0%7C0%7C636634388645464924&sdata=2ehh92tNbfwf3fJTp%2Fx7IUOgGSU > h6pyrc2XsdRJkTw4%3D&reserved=0 | > Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | > Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
