---

yaml --- r: 283483 b: refs/heads/master c: 34aed73 h: refs/heads/master i: 283481: 8230abb 283479: 7e966c1 v: v3
git-mirror · Jan 6, 2012 · ccb9ed1 · ccb9ed1
1 parent 2221efa
commit ccb9ed1
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Showing 3 changed files with 27 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ded7fc7b055055427d0d04958482dbe3d23e087d
+refs/heads/master: 34aed73df3a9e75e313a7510b201f6755ae3e6bc
diff --git a/trunk/drivers/power/s3c_adc_battery.c b/trunk/drivers/power/s3c_adc_battery.c
@@ -47,6 +47,22 @@ static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
 		msecs_to_jiffies(JITTER_DELAY));
 }
 
+static int gather_samples(struct s3c_adc_client *client, int num, int channel)
+{
+	int value, i;
+
+	/* default to 1 if nothing is set */
+	if (num < 1)
+		num = 1;
+
+	value = 0;
+	for (i = 0; i < num; i++)
+		value += s3c_adc_read(client, channel);
+	value /= num;
+
+	return value;
+}
+
 static enum power_supply_property s3c_adc_backup_bat_props[] = {
 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
 	POWER_SUPPLY_PROP_VOLTAGE_MIN,
@@ -67,7 +83,8 @@ static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
 	if (bat->volt_value < 0 ||
 		jiffies_to_msecs(jiffies - bat->timestamp) >
 			BAT_POLL_INTERVAL) {
-		bat->volt_value = s3c_adc_read(bat->client,
+		bat->volt_value = gather_samples(bat->client,
+			bat->pdata->backup_volt_samples,
 			bat->pdata->backup_volt_channel);
 		bat->volt_value *= bat->pdata->backup_volt_mult;
 		bat->timestamp = jiffies;
@@ -139,9 +156,11 @@ static int s3c_adc_bat_get_property(struct power_supply *psy,
 	if (bat->volt_value < 0 || bat->cur_value < 0 ||
 		jiffies_to_msecs(jiffies - bat->timestamp) >
 			BAT_POLL_INTERVAL) {
-		bat->volt_value = s3c_adc_read(bat->client,
+		bat->volt_value = gather_samples(bat->client,
+			bat->pdata->volt_samples,
 			bat->pdata->volt_channel) * bat->pdata->volt_mult;
-		bat->cur_value = s3c_adc_read(bat->client,
+		bat->cur_value = gather_samples(bat->client,
+			bat->pdata->current_samples,
 			bat->pdata->current_channel) * bat->pdata->current_mult;
 		bat->timestamp = jiffies;
 	}

diff --git a/trunk/include/linux/s3c_adc_battery.h b/trunk/include/linux/s3c_adc_battery.h
@@ -25,6 +25,10 @@ struct s3c_adc_bat_pdata {
 	const unsigned int current_channel;
 	const unsigned int backup_volt_channel;
 
+	const unsigned int volt_samples;
+	const unsigned int current_samples;
+	const unsigned int backup_volt_samples;
+
 	const unsigned int volt_mult;
 	const unsigned int current_mult;
 	const unsigned int backup_volt_mult;