[PATCH 3/4] drivers/misc: Add ASpeed LPC control driver

Benjamin Herrenschmidt benh at kernel.crashing.org
Fri Jan 13 02:36:16 AEDT 2017

On Thu, 2017-01-12 at 08:43 +0100, Greg KH wrote:
> On Thu, Jan 12, 2017 at 11:29:09AM +1100, Cyril Bur wrote:
> > This driver exposes a reserved chunk of BMC ram to userspace as
> > well as
> > an ioctl interface to control the BMC<->HOST mapping of the LPC
> > bus.
> > This allows for a communication channel between the BMC and the
> > host
> Why not make this a UIO driver?  Why does it have to be a character
> device?

See my other email (looks like I'm getting things in reverse order
today ;-), basically it should just be some ioctl's, but what they do
should really be done by the kernel as it controls external access to
part of the chip physical address space.


More information about the openbmc mailing list