New kernel drivers and device migrations (#563)

Devices/unphone/source/BatteryManager.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <tactility/check.h>
+#include <tactility/device.h>
+
+struct Device;
+struct GpioDescriptor;
+
+/**
+ * Easy access to GPIO pins
+ */
+class BatteryManager final {
+
+    ::Device* expander = nullptr;
+    ::Device* batteryManagement = nullptr;
+    ::GpioDescriptor* expanderPowerPin = nullptr;
+
+    bool initGpioExpander();
+
+
+public:
+
+    explicit BatteryManager() {
+        check(device_get_by_name("bq24295", &batteryManagement) == ERROR_NONE);
+    }
+
+    ~BatteryManager() {
+        device_put(batteryManagement);
+    }
+
+    bool init();
+
+    bool setExpanderPower(bool on) const;
+
+    void turnPeripheralsOff() const;
+
+    /** Battery management (BQ24295) will stop supplying power until USB connects */
+    void setShipping(bool on) const;
+
+    bool isUsbPowerConnected() const;
+};