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SubjectRe: what's a platform device?
On Mon, Feb 27, 2006 at 04:25:52PM -0600, Kumar Gala wrote:
> >>>This makes sense, but you seem to be talking about hierarchy more
> >>>the
> >>>functionality. I agree in your description of hierarchy.
> >>>
> >>>I was looking at it from a functional point of view, maybe more from
> >>>the device view then from the bus. I need a struct device type that
> >>>contains resources, a name, an id. I'll do matching based on name.
> >>> From a functional point of view platform does all this.
> >>>
> >>>Based on your description would you say that a platform_device's
> >>>parent device should always be platform_bus? [I'm getting at the
> >>>fact
> >>>that we allow pdev->dev.parent to be set by the caller of
> >>>platform_device_add].
> >>>
> >>>Hmm, as I think about this further, I think that its more
> >>>coincidence
> >>>that the functionality for the "kumar" bus is equivalent to that of
> >>>the "platform" bus.
> >>>
> >>
> >>What about a new bus_type that uses all the sematics of the
> >>platform_bus.
> >>Doing someting like the following which would allow the caller to
> >>specify
> >>their own bus_type.
> >>
> >>I'm just trying to avoid duplicating alot of code that already
> >>exists in
> >>base/platform.c
> >
> >I'm ok with this patch, Russell?
>
> http://marc.theaimsgroup.com/?l=linux-kernel&m=114072367307531&w=2
>
> Russell, comments?

No particular opinion on this, other than maybe we want to move the
dev.bus/driver.bus initialisation out of these functions and inline
or something like that - just so there's some distinction between
real platform devices and these other types.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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