FuriHal, Power, UnitTests: battery charging voltage limit API (#2063)

firmware/targets/f7/api_symbols.csv

@@ -1194,6 +1194,7 @@ Function,+,furi_hal_power_enable_external_3_3v,void,
 Function,+,furi_hal_power_enable_otg,void,
 Function,+,furi_hal_power_gauge_is_ok,_Bool,
 Function,+,furi_hal_power_get_bat_health_pct,uint8_t,
+Function,+,furi_hal_power_get_battery_charging_voltage,float,
 Function,+,furi_hal_power_get_battery_current,float,FuriHalPowerIC
 Function,+,furi_hal_power_get_battery_design_capacity,uint32_t,
 Function,+,furi_hal_power_get_battery_full_capacity,uint32_t,
@@ -1212,6 +1213,7 @@ Function,+,furi_hal_power_is_charging_done,_Bool,
 Function,+,furi_hal_power_is_otg_enabled,_Bool,
 Function,+,furi_hal_power_off,void,
 Function,+,furi_hal_power_reset,void,
+Function,+,furi_hal_power_set_battery_charging_voltage,void,float
 Function,+,furi_hal_power_shutdown,void,
 Function,+,furi_hal_power_sleep,void,
 Function,+,furi_hal_power_sleep_available,_Bool,

firmware/targets/f7/furi_hal/furi_hal_power.c

@@ -341,6 +341,20 @@ bool furi_hal_power_is_otg_enabled() {
     return ret;
 }
 
+float furi_hal_power_get_battery_charging_voltage() {
+    furi_hal_i2c_acquire(&furi_hal_i2c_handle_power);
+    float ret = (float)bq25896_get_vreg_voltage(&furi_hal_i2c_handle_power) / 1000.0f;
+    furi_hal_i2c_release(&furi_hal_i2c_handle_power);
+    return ret;
+}
+
+void furi_hal_power_set_battery_charging_voltage(float voltage) {
+    furi_hal_i2c_acquire(&furi_hal_i2c_handle_power);
+    // Adding 0.0005 is necessary because 4.016f is 4.015999794000, which gets truncated
+    bq25896_set_vreg_voltage(&furi_hal_i2c_handle_power, (uint16_t)(voltage * 1000.0f + 0.0005f));
+    furi_hal_i2c_release(&furi_hal_i2c_handle_power);
+}
+
 void furi_hal_power_check_otg_status() {
     furi_hal_i2c_acquire(&furi_hal_i2c_handle_power);
     if(bq25896_check_otg_fault(&furi_hal_i2c_handle_power))
@@ -470,10 +484,10 @@ void furi_hal_power_info_get(PropertyValueCallback out, char sep, void* context)
 
     if(sep == '.') {
         property_value_out(&property_context, NULL, 2, "format", "major", "2");
-        property_value_out(&property_context, NULL, 2, "format", "minor", "0");
+        property_value_out(&property_context, NULL, 2, "format", "minor", "1");
     } else {
         property_value_out(&property_context, NULL, 3, "power", "info", "major", "1");
-        property_value_out(&property_context, NULL, 3, "power", "info", "minor", "0");
+        property_value_out(&property_context, NULL, 3, "power", "info", "minor", "1");
     }
 
     uint8_t charge = furi_hal_power_get_pct();
@@ -481,7 +495,7 @@ void furi_hal_power_info_get(PropertyValueCallback out, char sep, void* context)
 
     const char* charge_state;
     if(furi_hal_power_is_charging()) {
-        if(charge < 100) {
+        if((charge < 100) && (!furi_hal_power_is_charging_done())) {
             charge_state = "charging";
         } else {
             charge_state = "charged";
@@ -491,6 +505,8 @@ void furi_hal_power_info_get(PropertyValueCallback out, char sep, void* context)
     }
 
     property_value_out(&property_context, NULL, 2, "charge", "state", charge_state);
+    uint16_t charge_voltage = (uint16_t)(furi_hal_power_get_battery_charging_voltage() * 1000.f);
+    property_value_out(&property_context, "%u", 2, "charge", "voltage", charge_voltage);
     uint16_t voltage =
         (uint16_t)(furi_hal_power_get_battery_voltage(FuriHalPowerICFuelGauge) * 1000.f);
     property_value_out(&property_context, "%u", 2, "battery", "voltage", voltage);
@@ -567,6 +583,13 @@ void furi_hal_power_debug_get(PropertyValueCallback out, void* context) {
         "charger",
         "vbat",
         bq25896_get_vbat_voltage(&furi_hal_i2c_handle_power));
+    property_value_out(
+        &property_context,
+        "%d",
+        2,
+        "charger",
+        "vreg",
+        bq25896_get_vreg_voltage(&furi_hal_i2c_handle_power));
     property_value_out(
         &property_context,
         "%d",

firmware/targets/furi_hal_include/furi_hal_power.h

@@ -121,6 +121,22 @@ void furi_hal_power_check_otg_status();
  */
 bool furi_hal_power_is_otg_enabled();
 
+/** Get battery charging voltage in V
+ *
+ * @return     voltage in V
+ */
+float furi_hal_power_get_battery_charging_voltage();
+
+/** Set battery charging voltage in V
+ *
+ * Invalid values will be clamped to the nearest valid value.
+ *
+ * @param      voltage[in]  voltage in V
+ *
+ * @return     voltage in V
+ */
+void furi_hal_power_set_battery_charging_voltage(float voltage);
+
 /** Get remaining battery battery capacity in mAh
  *
  * @return     capacity in mAh