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Subject[PATCH 5/9] bq27x00: Cache temperature value in converted unit
Date
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
---
drivers/power/bq27x00_battery.c | 45 ++++++++++++++++++++------------------
1 files changed, 24 insertions(+), 21 deletions(-)
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index e9aeb53..a22124a 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -248,6 +248,28 @@ static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
}

/*
+ * Return the battery temperature in tenths of degree Celsius
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
+{
+ int temp;
+
+ temp = bq27x00_read(di, BQ27x00_REG_TEMP, false);
+ if (temp < 0) {
+ dev_err(di->dev, "error reading temperature\n");
+ return temp;
+ }
+
+ if (di->chip == BQ27500)
+ temp -= 2731;
+ else
+ temp = ((temp * 5) - 5463) / 2;
+
+ return temp;
+}
+
+/*
* Return the battery Cycle count total
* Or < 0 if something fails.
*/
@@ -304,7 +326,7 @@ static void bq27x00_update(struct bq27x00_device_info *di)
cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF);
cache.charge_full = bq27x00_battery_read_lmd(di);
}
- cache.temperature = bq27x00_read(di, BQ27x00_REG_TEMP, false);
+ cache.temperature = bq27x00_battery_read_temperature(di);
cache.cycle_count = bq27x00_battery_read_cyct(di);

/* We only have to read charge design full once */
@@ -334,25 +356,6 @@ static void bq27x00_battery_poll(struct work_struct *work)
}
}

-
-/*
- * Return the battery temperature in tenths of degree Celsius
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_temperature(struct bq27x00_device_info *di,
- union power_supply_propval *val)
-{
- if (di->cache.temperature < 0)
- return di->cache.temperature;
-
- if (di->chip == BQ27500)
- val->intval = di->cache.temperature - 2731;
- else
- val->intval = ((di->cache.temperature * 5) - 5463) / 2;
-
- return 0;
-}
-
/*
* Return the battery average current in µA
* Note that current can be negative signed as well
@@ -511,7 +514,7 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
ret = bq27x00_battery_capacity_level(di, val);
break;
case POWER_SUPPLY_PROP_TEMP:
- ret = bq27x00_battery_temperature(di, val);
+ ret = bq27x00_simple_value(di->cache.temperature, val);
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
ret = bq27x00_simple_value(di->cache.time_to_empty, val);
--
1.7.5.4
--
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