linux-kernel - [rfc/patch 15/15] power: bq27200: add energy average

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Message-Id: <1247422177-7329-15-git-send-email-me@felipebalbi.com>
Date:	Sun, 12 Jul 2009 21:09:37 +0300
From:	Felipe Balbi <me@...ipebalbi.com>
To:	dwmw2@...radead.org
Cc:	linux-kernel@...r.kernel.org, Felipe Balbi <me@...ipebalbi.com>
Subject: [rfc/patch 15/15] power: bq27200: add energy average

report energy average to userland.

Signed-off-by: Felipe Balbi <me@...ipebalbi.com>
---
 drivers/power/bq27200_battery.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/drivers/power/bq27200_battery.c b/drivers/power/bq27200_battery.c
index 26ef2be..2fbe7a4 100644
--- a/drivers/power/bq27200_battery.c
+++ b/drivers/power/bq27200_battery.c
@@ -77,6 +77,7 @@ static enum power_supply_property bq27200_props[] = {
 	POWER_SUPPLY_PROP_POWER_AVG,
 	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
 	POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
+	POWER_SUPPLY_PROP_ENERGY_AVG,
 };
 
 /*
@@ -183,6 +184,19 @@ static int bq27200_power(struct bq27200 *bq)
 	return (ret * BQ27200_POWER_CONSTANT) / BQ27200_SENSING_RESISTOR;
 }
 
+static int bq27200_energy(struct bq27200 *bq)
+{
+	int ret;
+
+	ret = bq27200_readw(bq, BQ27200_REG_SAE);
+	if (ret < 0) {
+		dev_err(&bq->client->dev, "error reading average energy\n");
+		return ret;
+	}
+
+	return (ret * BQ27200_POWER_CONSTANT) / BQ27200_SENSING_RESISTOR;
+}
+
 static int bq27200_time_to_empty(struct bq27200 *bq)
 {
 	int ret;
@@ -242,6 +256,9 @@ static int bq27200_get_property(struct power_supply *psy,
 	case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
 		val->intval = bq27200_time_to_full(bq);
 		break;
+	case POWER_SUPPLY_PROP_ENERGY_AVG:
+		val->intval = bq27200_energy(bq);
+		break;
 	default:
 		return -EINVAL;
 	}
-- 
1.6.1.3

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