linux-kernel - Re: [PATCH 1/2] thermal: ti-soc-thermal: Enable addition power management

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Message-ID: <20200819125417.GG2994@atomide.com>
Date:   Wed, 19 Aug 2020 15:54:17 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Adam Ford <aford173@...il.com>
Cc:     Linux-OMAP <linux-omap@...r.kernel.org>,
        Adam Ford-BE <aford@...conembedded.com>,
        Russell King <linux@...linux.org.uk>,
        Eduardo Valentin <edubezval@...il.com>,
        Keerthy <j-keerthy@...com>, Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH 1/2] thermal: ti-soc-thermal: Enable addition power
 management

* Adam Ford <aford173@...il.com> [200819 12:21]:
> On Tue, Aug 18, 2020 at 11:58 PM Tony Lindgren <tony@...mide.com> wrote:
> >
> > * Adam Ford <aford173@...il.com> [200818 15:46]:
> > > @@ -1153,6 +1166,38 @@ static int ti_bandgap_suspend(struct device *dev)
> > >       return err;
> > >  }
> > >
> > > +static int bandgap_omap_cpu_notifier(struct notifier_block *nb,
> > > +                               unsigned long cmd, void *v)
> > > +{
> > > +     struct ti_bandgap *bgp;
> > > +
> > > +     bgp = container_of(nb, struct ti_bandgap, nb);
> > > +
> > > +     spin_lock(&bgp->lock);
> > > +     switch (cmd) {
> > > +     case CPU_CLUSTER_PM_ENTER:
> > > +             if (bgp->is_suspended)
> > > +                     break;
> > > +             ti_bandgap_save_ctxt(bgp);
> > > +             ti_bandgap_power(bgp, false);
> > > +             if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
> > > +                     clk_disable(bgp->fclock);
> > > +             break;
> > > +     case CPU_CLUSTER_PM_ENTER_FAILED:
> > > +     case CPU_CLUSTER_PM_EXIT:
> > > +             if (bgp->is_suspended)
> > > +                     break;
> > > +             if (TI_BANDGAP_HAS(bgp, CLK_CTRL))
> > > +                     clk_enable(bgp->fclock);
> > > +             ti_bandgap_power(bgp, true);
> > > +             ti_bandgap_restore_ctxt(bgp);
> > > +             break;
> > > +     }
> > > +     spin_unlock(&bgp->lock);
> > > +
> > > +     return NOTIFY_OK;
> > > +}
> >
> > Hmm to me it looks like is_suspended is not used right now?
> > I guess you want to set it in ti_bandgap_suspend() and clear
> > it in ti_bandgap_resume()?
> >
> > Otherwise looks good to me, I can't test the power consumption
> > right now though so you may want to check it to make sure
> > device still hits off mode during idle.
> 
> I have a V2.  Do you want me to re-post 2/2 with V2 as no change, or
> should I just submit this patch alone?

Up to you, might make it easier for other folks to follow if the
whole series is reposted.

Regards,

Tony