On Thursday 10 March 2011, Mark Brown wrote:

Most of the devices doing that on ARMs tend to be devices where there's
no bus that it's meaningful to expose to software - they'll typically be
hanging off an AHB or APB bus which has either no real software control
or control which is very heavily tied into the overall system control
and so is better treated over the whole SoC rather than the bus.

I can accept that it's reasonable to put all devices under
/sys/devices/platform/ that are on the same top-level AHB or APB bus,
although I also don't see a reason against making that bus a single
device.

The one thing that really doesn't belong in /sys/devices/platform/
however are devices that are clearly children of some other
device, e.g. a UART behind MFD behind I2C behind AHB.

	Arnd