[PATCH 4/6] omap4: dpll: Enable all DPLL autoidle at boot
Rajendra Nayak
rnayak at ti.com
Tue Feb 1 00:24:58 EST 2011
Hi Paul,
> -----Original Message-----
> From: Paul Walmsley [mailto:paul at pwsan.com]
> Sent: Tuesday, February 01, 2011 4:47 AM
> To: rnayak at ti.com; Santosh Shilimkar
> Cc: linux-omap at vger.kernel.org; khilman at ti.com; b-cousson at ti.com;
linux-arm-kernel at lists.infradead.org
> Subject: Re: [PATCH 4/6] omap4: dpll: Enable all DPLL autoidle at boot
>
> Hi guys
>
> On Fri, 28 Jan 2011, Santosh Shilimkar wrote:
>
> > From: Rajendra Nayak <rnayak at ti.com>
> >
> > Enable all DPLL autoidle at boot on OMAP4.
>
> Is there some reason why we can't do this in the OMAP4 PM code? At some
> point, I think it would be good to essentially disable all PM at boot,
and
> then let the PM code specifically enable autoidle later in the boot
> process, etc. The idea being that !CONFIG_PM would result in a chip
> programmed for lowest latency, etc.
I guess it makes sense to do this late in boot and only if CONFIG_PM
is enabled. Will make the necessary changes and repost.
Regards,
Rajendra
>
> > Signed-off-by: Rajendra Nayak <rnayak at ti.com>
> > ---
> > arch/arm/mach-omap2/clock44xx_data.c | 2 ++
> > 1 files changed, 2 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/arm/mach-omap2/clock44xx_data.c
b/arch/arm/mach-omap2/clock44xx_data.c
> > index e8cb32f..e5c59a0 100644
> > --- a/arch/arm/mach-omap2/clock44xx_data.c
> > +++ b/arch/arm/mach-omap2/clock44xx_data.c
> > @@ -3300,6 +3300,8 @@ int __init omap4xxx_clk_init(void)
> > clkdev_add(&c->lk);
> > clk_register(c->lk.clk);
> > omap2_init_clk_clkdm(c->lk.clk);
> > + if (c->lk.clk->dpll_data)
> > + omap3_dpll_allow_idle(c->lk.clk);
> > }
> >
> > recalculate_root_clocks();
> > --
> > 1.6.0.4
> >
>
>
> - Paul
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