On Wed, Jun 20, 2018 at 01:43:10PM -0600, Rob Herring wrote: > On Sun, Jun 17, 2018 at 08:49:47PM +0800, Dong Aisheng wrote: > > The Messaging Unit module enables two processors within > > the SoC to communicate and coordinate by passing messages > > (e.g. data, status and control) through the MU interface. > > > > Cc: Shawn Guo <shawnguo@xxxxxxxxxx> > > Cc: Sascha Hauer <kernel@xxxxxxxxxxxxxx> > > Cc: Fabio Estevam <fabio.estevam@xxxxxxx> > > Cc: Rob Herring <robh+dt@xxxxxxxxxx> > > Cc: Mark Rutland <mark.rutland@xxxxxxx> > > Cc: devicetree@xxxxxxxxxxxxxxx > > Signed-off-by: Dong Aisheng <aisheng.dong@xxxxxxx> > > --- > > v1->v2: > > * typo fixes > > * remove status property > > * remove imx6&7 compatible string which may be added later for > > the generic mailbox binding > > > > Note: Because MU used by SCU is not implemented as a mailbox driver, > > Instead, they're provided in library calls to gain higher performance. > > Using a binding doesn't mean you have to use an OS's subsystem. > > What needs higher performance? What's the performance difference? Why > can't the mailbox framework be improved? >From what I see the performance is improved by polling the interrupt registers rather than using interrupts. I see no reason though why this can't be implemented with the mailbox framework as is. 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
