On Wed, Jun 13, 2018 at 08:21:10PM +0800, Dong Aisheng wrote: > Hi Oleksij, > > On Fri, Jun 1, 2018 at 2:58 PM, Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> wrote: > > The Mailbox controller is able to send messages (up to 4 32 bit words) > > between the endpoints. > > Could we really be able to send up to 4 42bit words with this driver? > > It looks to me the current Mailbox framework is more designed for share mem > transfer which does not fit i.MX MU well. The mailbox framework just defines channels and messages. A message is a void * which may contain arbitrary data or even no data at all; some drivers simply ignore the message pointer, so in fact they act as a doorbell unit only. There's nothing about shared memory in the mailbox framework, but of course you can combine a mailbox driver and shared memory to a remote message mechanism. That could be done with the i.MX MU aswell and would indeed be a good match for the hardware. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | 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
