Re: [PATCH v3 5/5] cpufreq: qoriq: Don't look at clock implementation details

From: Scott Wood <scottwood@freescale.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@codeaurora.org>,
	"Russell King" <linux@arm.linux.org.uk>,
	<linux-clk@vger.kernel.org>, <linux-pm@vger.kernel.org>,
	<linuxppc-dev@lists.ozlabs.org>,
	<linux-arm-kernel@lists.infradead.org>,
	Tang Yuantian <Yuantian.Tang@freescale.com>
Subject: Re: [PATCH v3 5/5] cpufreq: qoriq: Don't look at clock implementation details
Date: Fri, 25 Sep 2015 16:17:07 -0500	[thread overview]
Message-ID: <1443215827.32298.130.camel@freescale.com> (raw)
In-Reply-To: <3374654.Hks5DeSGVV@vostro.rjw.lan>

On Fri, 2015-09-25 at 23:42 +0200, Rafael J. Wysocki wrote:
> On Tuesday, September 22, 2015 12:46:54 PM Viresh Kumar wrote:
> > On 19-09-15, 23:29, Scott Wood wrote:
> > > Get the CPU clock's potential parent clocks from the clock interface
> > > itself, rather than manually parsing the clocks property to find a
> > > phandle, looking at the clock-names property of that, and assuming that
> > > those are valid parent clocks for the cpu clock.
> > > 
> > > This is necessary now that the clocks are generated based on the clock
> > > driver's knowledge of the chip rather than a fragile device-tree
> > > description of the mux options.
> > > 
> > > We can now rely on the clock driver to ensure that the mux only exposes
> > > options that are valid.  The cpufreq driver was currently being overly
> > > conservative in some cases -- for example, the "min_cpufreq =
> > > get_bus_freq()" restriction only applies to chips with erratum
> > > A-004510, and whether the freq_mask used on p5020 is needed depends on
> > > the actual frequencies of the PLLs (FWIW, p5040 has a similar
> > > limitation but its .freq_mask was zero) -- and the frequency mask
> > > mechanism made assumptions about particular parent clock indices that
> > > are no longer valid.
> > > 
> > > Signed-off-by: Scott Wood <scottwood@freescale.com>
> > > ---
> > > v3: was patch 1/5 and patch 4/5, plus blacklist e6500 and changes
> > > to clk api usage
> > > 
> > >  drivers/cpufreq/qoriq-cpufreq.c | 137 ++++++++++++---------------------
> > > -------
> > >  1 file changed, 40 insertions(+), 97 deletions(-)
> > 
> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> 
> I'm wondering who's supposed to be merging this set?

As I noted in the cover letter, I'm looking for acks so that I can apply 
these to a topic branch which can be pulled through the PPC and ARM trees, 
each of which will have patches that depend on it.

-Scott