[PATCH 6/6] power: supply: sc27xx: Add POWER_SUPPLY_PROP_CALIBRATE attribute

[Baolin Wang]

From: Yuanjiang Yu <yuanjiang...@unisoc.com>

Add the 'POWER_SUPPLY_PROP_CALIBRATE' attribute to allow chareger manager
to calibrate the battery capacity.

Signed-off-by: Yuanjiang Yu <yuanjiang...@unisoc.com>
Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
 drivers/power/supply/sc27xx_fuel_gauge.c |   27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/power/supply/sc27xx_fuel_gauge.c 
b/drivers/power/supply/sc27xx_fuel_gauge.c
index fa85f40..6363c48 100644
--- a/drivers/power/supply/sc27xx_fuel_gauge.c
+++ b/drivers/power/supply/sc27xx_fuel_gauge.c
@@ -111,6 +111,7 @@ struct sc27xx_fgu_data {
 static int sc27xx_fgu_cap_to_clbcnt(struct sc27xx_fgu_data *data, int 
capacity);
 static void sc27xx_fgu_capacity_calibration(struct sc27xx_fgu_data *data,
                                            int cap, int int_mode);
+static void sc27xx_fgu_adjust_cap(struct sc27xx_fgu_data *data, int cap);
 
 static const char * const sc27xx_charger_supply_name[] = {
        "sc2731_charger",
@@ -610,17 +611,25 @@ static int sc27xx_fgu_set_property(struct power_supply 
*psy,
        struct sc27xx_fgu_data *data = power_supply_get_drvdata(psy);
        int ret;
 
-       if (psp != POWER_SUPPLY_PROP_CAPACITY)
-               return -EINVAL;
-
        mutex_lock(&data->lock);
 
-       ret = sc27xx_fgu_save_last_cap(data, val->intval);
+       switch (psp) {
+       case POWER_SUPPLY_PROP_CAPACITY:
+               ret = sc27xx_fgu_save_last_cap(data, val->intval);
+               if (ret < 0)
+                       dev_err(data->dev, "failed to save battery capacity\n");
+               break;
 
-       mutex_unlock(&data->lock);
+       case POWER_SUPPLY_PROP_CALIBRATE:
+               sc27xx_fgu_adjust_cap(data, val->intval);
+               ret = 0;
+               break;
 
-       if (ret < 0)
-               dev_err(data->dev, "failed to save battery capacity\n");
+       default:
+               ret = -EINVAL;
+       }
+
+       mutex_unlock(&data->lock);
 
        return ret;
 }
@@ -635,7 +644,8 @@ static void sc27xx_fgu_external_power_changed(struct 
power_supply *psy)
 static int sc27xx_fgu_property_is_writeable(struct power_supply *psy,
                                            enum power_supply_property psp)
 {
-       return psp == POWER_SUPPLY_PROP_CAPACITY;
+       return psp == POWER_SUPPLY_PROP_CAPACITY ||
+               psp == POWER_SUPPLY_PROP_CALIBRATE;
 }
 
 static enum power_supply_property sc27xx_fgu_props[] = {
@@ -651,6 +661,7 @@ static int sc27xx_fgu_property_is_writeable(struct 
power_supply *psy,
        POWER_SUPPLY_PROP_CURRENT_AVG,
        POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
        POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
+       POWER_SUPPLY_PROP_CALIBRATE,
 };
 
 static const struct power_supply_desc sc27xx_fgu_desc = {
-- 
1.7.9.5