[PATCH 00/23] RFC: exynos multiplatform support

On Wednesday 06 March 2013, Thierry Reding wrote:

quoted

Option 2 would probably come down to having a trivial MFD driver exposing
a regmap. You can probably reuse drivers/mfd/syscon.c for this and make
the node compatible with "syscon" to designate the clock registers as
a system-wide resource, making the other device nodes register-less.

I think option 2 is the standard method if one hardware block provides
several logical devices. I find it to be a pretty nice solution to this
problem. We also have precedent in the PWM subsystem. The TWL chips for
instance use it to create a platform device which is later driven by a
PWM driver.

One difference though is that the TWL chip is a heterogenous MFD that has
a lot of different sub-devices, where in case of Exynos the timer device
has a set of identical units, each of which can be used either as a PWM or
as a clocksource or other timer.

	Arnd