power: supply: bq25890: Clean up POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT

Clean up misuse of POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT and
POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX and document what
exactly each value means.

The POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT content is newly read
back from hardware, while POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX
is reported as the maximum value set in DT.

Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
index 1298d57..5924b03 100644 (file)
--- a/drivers/power/supply/bq25890_charger.c
+++ b/drivers/power/supply/bq25890_charger.c
@@ -529,22 +529,6 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
                        val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
                break;
 
-       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
-               val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
-
-               /* When temperature is too low, charge current is decreased */
-               if (bq->state.ntc_fault == NTC_FAULT_COOL) {
-                       ret = bq25890_field_read(bq, F_JEITA_ISET);
-                       if (ret < 0)
-                               return ret;
-
-                       if (ret)
-                               val->intval /= 5;
-                       else
-                               val->intval /= 2;
-               }
-               break;
-
        case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
                if (!state.online) {
                        val->intval = 0;
@@ -604,6 +588,46 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
                val->intval = ret * -50000;
                break;
 
+       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: /* I_BAT user limit */
+               /*
+                * This is user-configured constant charge current supplied
+                * from charger to battery in first phase of charging, when
+                * battery voltage is below constant charge voltage.
+                *
+                * This value reflects the current hardware setting.
+                *
+                * The POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX is the
+                * maximum value of this property.
+                */
+               ret = bq25890_field_read(bq, F_ICHG);
+               if (ret < 0)
+                       return ret;
+               val->intval = bq25890_find_val(ret, TBL_ICHG);
+
+               /* When temperature is too low, charge current is decreased */
+               if (bq->state.ntc_fault == NTC_FAULT_COOL) {
+                       ret = bq25890_field_read(bq, F_JEITA_ISET);
+                       if (ret < 0)
+                               return ret;
+
+                       if (ret)
+                               val->intval /= 5;
+                       else
+                               val->intval /= 2;
+               }
+               break;
+
+       case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:     /* I_BAT max */
+               /*
+                * This is maximum allowed constant charge current supplied
+                * from charger to battery in first phase of charging, when
+                * battery voltage is below constant charge voltage.
+                *
+                * This value is constant for each battery and set from DT.
+                */
+               val->intval = bq25890_find_val(bq->init_data.ichg, TBL_ICHG);
+               break;
+
        case POWER_SUPPLY_PROP_TEMP:
                ret = bq25890_field_read(bq, F_TSPCT);
                if (ret < 0)
@@ -887,6 +911,7 @@ static const enum power_supply_property bq25890_power_supply_props[] = {
        POWER_SUPPLY_PROP_CHARGE_TYPE,
        POWER_SUPPLY_PROP_ONLINE,
        POWER_SUPPLY_PROP_HEALTH,
+       POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
        POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
        POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
        POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,