Re: [PATCH V11 1/3] ARM: dts: Add pmu sysreg node to exynos5250 and exynos5420 dtsi files

[Tomasz Figa <tomasz.figa@gmail.com>]

On Thursday 05 of December 2013 10:35:20 Doug Anderson wrote:
> Tomasz,
> 
> On Thu, Dec 5, 2013 at 10:30 AM, Tomasz Figa <tomasz.figa@gmail.com> wrote:
> >> I'd vote for using "pmu-system-registers".  We end up using the
> >> "syscon" subsystem but really we're describing pmu registers.
> >>
> >> I'd even say that you don't need to formally specify the "name" in the
> >> bindings (though I'm not up with all the latest device tree
> >> requirements).  ...still you'd want to use "pmu-system-registers" in
> >> the DTS changes.
> >
> > Well, since the name should specify the class of device, I would say that
> > pmu-system-registers is too specific. If we want to change this, I'd say
> > we should go with system-controller.
> 
> ...but the "compatible" is "samsung,exynos5250-pmu", "syscon", right?
> That means that the class of the device is "exynos5250-pmu", right?

Nope. "samsung,exynos5250-pmu" is the specific device (or hardware
programming interface) this device is compatible with.

With class I mean the generic kind of device, such as system-controller,
i2c, pinctrl, display, etc., as specified by sections 2.2.1 and 2.2.2 of
ePAPR.

Anyway, node names are just a matter of coding style, as they don't have
any semantical meaning in most cases (such as this one).

> It is also compatible with the generic "syscon" class of devices.

It is also compatible with the generic "syscon" programming interface,
which represents a set of loosely related registers that control various
aspects of other IP blocks.

Best regards,
Tomasz