linux-kernel - [PATCH] bq27x00_battery: Call power_supply

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Date:	Tue, 21 Oct 2014 18:15:37 -0700
From:	Puthikorn Voravootivat <puthik@...omium.org>
To:	linux-pm@...r.kernel.org
Cc:	Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org,
	David Riley <davidriley@...omium.org>,
	Benson Leung <bleung@...omium.org>,
	Puthikorn Voravootivat <puthik@...omium.org>
Subject: [PATCH] bq27x00_battery: Call power_supply_changed only when capacity changed

In current driver, power_supply_changed() is called whenever any of
the battery attribute changed. This causes kernel to increases the
'/sys/power/wakeup_count' and make suspend not working correctly.

This patch change this behavior to call power_supply_changed()
only when the battery capacity changed.

Signed-off-by: Puthikorn Voravootivat <puthik@...omium.org>
Reviewed-by: David Riley <davidriley@...omium.org>
Reviewed-by: Benson Leung <bleung@...omium.org>
---
 drivers/power/bq27x00_battery.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index e3bacfe..7ab3de0 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -493,10 +493,11 @@ static void bq27x00_update(struct bq27x00_device_info *di)
 			di->charge_design_full = bq27x00_battery_read_ilmd(di);
 	}
 
-	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) {
-		di->cache = cache;
+	if (di->cache.capacity != cache.capacity)
 		power_supply_changed(&di->bat);
-	}
+
+	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
+		di->cache = cache;
 
 	di->last_update = jiffies;
 }
-- 
2.1.0.rc2.206.gedb03e5

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