From mboxrd@z Thu Jan  1 00:00:00 1970
From: Liam Breck <liam@networkimprov.net>
Subject: Re: [PATCH 2/2] power: bq24190_charger: Use PM runtime autosuspend
Date: Fri, 3 Feb 2017 13:44:52 -0800
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To: Tony Lindgren <tony@atomide.com>
Cc: Sebastian Reichel <sre@kernel.org>, Liam Breck <kernel@networkimprov.net>, "Mark A . Greer" <mgreer@animalcreek.com>, linux-pm@vger.kernel.org, linux-omap@vger.kernel.org

On Fri, Feb 3, 2017 at 1:17 PM, Tony Lindgren <tony@atomide.com> wrote:

> From: Tony Lindgren <tony@atomide.com>
> Date: Mon, 30 Jan 2017 07:10:31 -0800
> Subject: [PATCH] power: bq24190_charger: Use PM runtime autosuspend
>
> We can get quite a few interrupts when the battery is trickle charging.
> Let's enable PM runtime autosuspend to avoid constantly toggling device
> driver PM runtime state.
>
> Let's use a 600 ms timeout as that's how long the USB chager detection
> might take.
>
> Cc: Liam Breck <kernel@networkimprov.net>
> Acked-by: Mark Greer <mgreer@animalcreek.com>
> Signed-off-by: Tony Lindgren <tony@atomide.com>

Acked-by: Liam Breck <kernel@networkimprov.net>


> @@ -1480,10 +1531,20 @@ static int bq24190_pm_suspend(struct device *dev)
>  {
>         struct i2c_client *client = to_i2c_client(dev);
>         struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
> +       int error;
> +
> +       error = pm_runtime_get_sync(bdi->dev);
> +       if (error < 0) {
> +               dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
> +               pm_runtime_put_noidle(bdi->dev);
> +       }
>
> -       pm_runtime_get_sync(bdi->dev);
>         bq24190_register_reset(bdi);
> -       pm_runtime_put_sync(bdi->dev);
> +
> +       if (!error) {
> +               pm_runtime_mark_last_busy(bdi->dev);
> +               pm_runtime_put_autosuspend(bdi->dev);
> +       }
>
>         return 0;
>  }
> @@ -1492,15 +1553,25 @@ static int bq24190_pm_resume(struct device *dev)
>  {
>         struct i2c_client *client = to_i2c_client(dev);
>         struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
> +       int error;
>
>         bdi->f_reg = 0;
>         bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */
>
> -       pm_runtime_get_sync(bdi->dev);
> +       error = pm_runtime_get_sync(bdi->dev);
> +       if (error < 0) {
> +               pm_runtime_put_noidle(bdi->dev);
> +               dev_warn(bdi->dev, "pm_runtime_get failed: %i\n", error);
> +       }

Last nitpick: call put_noidle after dev_warn, as in suspend :-)