Re: [PATCH 12/13] cpufreq: Add cpufreq driver for Tegra124
From: Thierry Reding
Date: Fri Jul 11 2014 - 10:57:52 EST
On Fri, Jul 11, 2014 at 12:12:07PM +0300, Peter De Schrijver wrote:
> On Fri, Jul 11, 2014 at 06:35:56AM +0200, Viresh Kumar wrote:
> > Hi Tuomas,
> > On 11 July 2014 03:12, Tuomas Tynkkynen <ttynkkynen@xxxxxxxxxx> wrote:
> > > Add a new cpufreq driver for Tegra124. Instead of using the PLLX as
> > > the CPU clocksource, switch immediately to the DFLL. It allows the use
> > > of higher clock rates, and will automatically scale the CPU voltage as
> > > well. We also rely on the DFLL driver to determine the CPU clock
> > > frequencies that the chip supports, so that we can directly build a
> > > cpufreq table with the OPP library helper dev_pm_opp_init_cpufreq_table.
> > >
> > > This driver is a completely independent of the old cpufreq driver
> > > (tegra-cpufreq), which is only used on Tegra20.
> > >
> > > Signed-off-by: Tuomas Tynkkynen <ttynkkynen@xxxxxxxxxx>
> > Please reuse cpufreq-cpu0 instead of adding a new driver. Similar
> > is being adopted by all platforms now: krait, mvebu, etc..
> I don't think that's going to work? The voltage scaling is handled in hw.
Do we have to handle it in hardware or can we opt to do it in software,
Description: PGP signature