linux-kernel - Re: [PATCH] cros_pchg: Sync port status on resume

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Date:   Tue, 29 Aug 2023 10:46:19 -0700
From:   Daisuke Nojiri <dnojiri@...omium.org>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
Cc:     Daisuke Nojiri <dnojiri@...omium.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cros_pchg: Sync port status on resume

Hi Sebastian. Friendly ping. Any progress on this? Thanks,


On Mon, May 8, 2023 at 9:37 AM Sebastian Reichel
<sebastian.reichel@...labora.com> wrote:
>
> Hi,
>
> On Mon, Apr 17, 2023 at 03:16:10PM -0700, Daisuke Nojiri wrote:
> > When a stylus is removed (or attached) during suspend, the device detach
> > (or attach) events can be lost. This patch makes the peripheral device
> > charge driver retrieve the latest status from the EC on resume.
> >
> > BUG=b:276414488
> > TEST=Redrix
> >
> > Signed-off-by: Daisuke Nojiri <dnojiri@...omium.org>
> > ---
>
> Thanks, queued.
>
> -- Sebastian
>
> >  .../power/supply/cros_peripheral_charger.c    | 25 ++++++++++++++++---
> >  1 file changed, 22 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/power/supply/cros_peripheral_charger.c b/drivers/power/supply/cros_peripheral_charger.c
> > index 1379afd9698d..a204f2355be4 100644
> > --- a/drivers/power/supply/cros_peripheral_charger.c
> > +++ b/drivers/power/supply/cros_peripheral_charger.c
> > @@ -227,8 +227,7 @@ static int cros_pchg_get_prop(struct power_supply *psy,
> >       return 0;
> >  }
> >
> > -static int cros_pchg_event(const struct charger_data *charger,
> > -                        unsigned long host_event)
> > +static int cros_pchg_event(const struct charger_data *charger)
> >  {
> >       int i;
> >
> > @@ -256,7 +255,7 @@ static int cros_ec_notify(struct notifier_block *nb,
> >       if (!(host_event & EC_MKBP_PCHG_DEVICE_EVENT))
> >               return NOTIFY_DONE;
> >
> > -     return cros_pchg_event(charger, host_event);
> > +     return cros_pchg_event(charger);
> >  }
> >
> >  static int cros_pchg_probe(struct platform_device *pdev)
> > @@ -281,6 +280,8 @@ static int cros_pchg_probe(struct platform_device *pdev)
> >       charger->ec_dev = ec_dev;
> >       charger->ec_device = ec_device;
> >
> > +     platform_set_drvdata(pdev, charger);
> > +
> >       ret = cros_pchg_port_count(charger);
> >       if (ret <= 0) {
> >               /*
> > @@ -349,9 +350,27 @@ static int cros_pchg_probe(struct platform_device *pdev)
> >       return 0;
> >  }
> >
> > +#ifdef CONFIG_PM_SLEEP
> > +static int __maybe_unused cros_pchg_resume(struct device *dev)
> > +{
> > +     struct charger_data *charger = dev_get_drvdata(dev);
> > +
> > +     /*
> > +      * Sync all ports on resume in case reports from EC are lost during
> > +      * the last suspend.
> > +      */
> > +     cros_pchg_event(charger);
> > +
> > +     return 0;
> > +}
> > +#endif
> > +
> > +static SIMPLE_DEV_PM_OPS(cros_pchg_pm_ops, NULL, cros_pchg_resume);
> > +
> >  static struct platform_driver cros_pchg_driver = {
> >       .driver = {
> >               .name = DRV_NAME,
> > +             .pm = &cros_pchg_pm_ops,
> >       },
> >       .probe = cros_pchg_probe
> >  };
> > --
> > 2.39.2
> >