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 <redacted>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/power/supply/bq24190_charger.c | 153 ++++++++++++++++++++++++---------
 1 file changed, 111 insertions(+), 42 deletions(-)

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c

...

@@ -1234,11 +1267,15 @@ static void bq24190_check_status(struct bq24190_dev_info *bdi)
 static irqreturn_t bq24190_irq_handler_thread(int irq, void *data)
 {
        struct bq24190_dev_info *bdi = data;
+       int ret;

        bdi->irq_event = true;
-       pm_runtime_get_sync(bdi->dev);
+       ret = pm_runtime_get_sync(bdi->dev);
+       if (ret < 0)
+               return ret;
        bq24190_check_status(bdi);
-       pm_runtime_put_sync(bdi->dev);
+       pm_runtime_mark_last_busy(bdi->dev);
+       pm_runtime_put_autosuspend(bdi->dev);
        bdi->irq_event = false;

        return IRQ_HANDLED;