Re: [PATCH RFC v4 2/2] clk: Add handling of clk parent and rate assigned from DT

From: Peter De Schrijver
Date: Wed Apr 02 2014 - 04:01:20 EST

On Tue, Apr 01, 2014 at 03:19:40PM +0200, Ben Dooks wrote:
> On 31/03/14 21:06, Greg KH wrote:
> > On Mon, Mar 31, 2014 at 06:41:56PM +0200, Sylwester Nawrocki wrote:
> >> This function adds a helper function to configure clock parents and rates
> >> as specified in clock-parents, clock-rates DT properties for a consumer
> >> device and a call to it before driver is bound to a device.
> >>
> >> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> [snip]
> >
> > I don't understand why you need the driver core to initialize this one
> > type of thing? That should be in a driver, or in a class, or at worse
> > case, the platform code.
> >
> > What makes clocks so "unique" here?
> I suppose the issue here is that a lot of drivers currently use
> clocks and a number of systems have badly setup default clock trees
> at start time.
> Mark Brown and others have argued that the management of clocks which
> is common to all devices should not live in the driver.

Exactly, this data should be part of the clock provider DT nodes, not
of the device nodes.


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