power: supply: ab8500: Standardize operating temperature

Instead of storing the temperature limits in our custom
struct struct ab8500_bm_data, make struct power_supply_battery_info
a member of this and store the min and max temperatures inside
that struct as the temp_min/temp_max and
temp_alert_min/temp_alert_max respectively.

The values can be assigned from the device tree, but if
not present will be set to the same defaults as are currently
in the code.

This way we start to move over to using
struct power_supply_battery_info and make it possible to move
the data over to the device tree and we will move piece by
piece toward using the standard info struct.

Temperature hysteresis is currently not supported by the
standard struct but we move the assignment here as well so
that we have all parameterization in one spot.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

1 files changed, 32 insertions, 11 deletions

diff --git a/drivers/power/supply/ab8500_bmdata.c b/drivers/power/supply/ab8500_bmdata.c
index 6f6865c46926..41561b6adfd3 100644
--- a/drivers/power/supply/ab8500_bmdata.c
+++ b/drivers/power/supply/ab8500_bmdata.c
@@ -5,6 +5,17 @@
 
 #include "ab8500-bm.h"
 
+/* Default: under this temperature, charging is stopped */
+#define AB8500_TEMP_UNDER	3
+/* Default: between this temp and AB8500_TEMP_UNDER charging is reduced */
+#define AB8500_TEMP_LOW		8
+/* Default: between this temp and AB8500_TEMP_OVER charging is reduced */
+#define AB8500_TEMP_HIGH	43
+/* Default: over this temp, charging is stopped */
+#define AB8500_TEMP_OVER	48
+/* Default: temperature hysteresis */
+#define AB8500_TEMP_HYSTERESIS	3
+
 /*
  * These are the defined batteries that uses a NTC and ID resistor placed
  * inside of the battery pack.
@@ -437,10 +448,6 @@ static const struct ab8500_bm_charger_parameters chg = {
 };
 
 struct ab8500_bm_data ab8500_bm_data = {
-	.temp_under             = 3,
-	.temp_low               = 8,
-	.temp_high              = 43,
-	.temp_over              = 48,
 	.main_safety_tmr_h      = 4,
 	.temp_interval_chg      = 20,
 	.temp_interval_nochg    = 120,
@@ -459,7 +466,6 @@ struct ab8500_bm_data ab8500_bm_data = {
 	.batt_id                = 0,
 	.interval_charging      = 5,
 	.interval_not_charging  = 120,
-	.temp_hysteresis        = 3,
 	.gnd_lift_resistance    = 34,
 	.maxi                   = &ab8500_maxi_params,
 	.chg_params             = &chg,
@@ -470,18 +476,29 @@ int ab8500_bm_of_probe(struct power_supply *psy,
 		       struct ab8500_bm_data *bm)
 {
 	const struct batres_vs_temp *tmp_batres_tbl;
-	struct power_supply_battery_info info;
+	struct power_supply_battery_info *bi = &bm->bi;
 	struct device *dev = &psy->dev;
 	int ret;
 	int i;
 
-	ret = power_supply_get_battery_info(psy, &info);
+	ret = power_supply_get_battery_info(psy, bi);
 	if (ret) {
 		dev_err(dev, "cannot retrieve battery info\n");
 		return ret;
 	}
 
-	if (info.technology == POWER_SUPPLY_TECHNOLOGY_LION) {
+	if (bi->temp_min == INT_MIN)
+		bi->temp_min = AB8500_TEMP_UNDER;
+	if (bi->temp_max == INT_MAX)
+		bi->temp_max = AB8500_TEMP_OVER;
+	if (bi->temp_alert_min == INT_MIN)
+		bi->temp_alert_min = AB8500_TEMP_LOW;
+	if (bi->temp_alert_max == INT_MAX)
+		bi->temp_alert_max = AB8500_TEMP_HIGH;
+	bm->temp_hysteresis = AB8500_TEMP_HYSTERESIS;
+
+
+	if (bi->technology == POWER_SUPPLY_TECHNOLOGY_LION) {
 		bm->no_maintenance  = true;
 		bm->chg_unknown_bat = true;
 		bm->bat_type[BATTERY_UNKNOWN].charge_full_design = 2600;
@@ -492,7 +509,7 @@ int ab8500_bm_of_probe(struct power_supply *psy,
 	}
 
 	if (of_property_read_bool(psy->of_node, "thermistor-on-batctrl")) {
-		if (info.technology == POWER_SUPPLY_TECHNOLOGY_LION)
+		if (bi->technology == POWER_SUPPLY_TECHNOLOGY_LION)
 			tmp_batres_tbl = temp_to_batres_tbl_9100;
 		else
 			tmp_batres_tbl = temp_to_batres_tbl_thermistor;
@@ -507,7 +524,11 @@ int ab8500_bm_of_probe(struct power_supply *psy,
 	for (i = 0; i < bm->n_btypes; ++i)
 		bm->bat_type[i].batres_tbl = tmp_batres_tbl;
 
-	power_supply_put_battery_info(psy, &info);
-
 	return 0;
 }
+
+void ab8500_bm_of_remove(struct power_supply *psy,
+			 struct ab8500_bm_data *bm)
+{
+	power_supply_put_battery_info(psy, &bm->bi);
+}