Add control for fast USB Charge

Change-Id: I60e791ac3560f192d1dd3401fe79e36da577a512

2 files changed, 23 insertions, 0 deletions

diff --git a/GNexusParts/src/com/cyanogenmod/settings/device/DeviceSettings.java b/GNexusParts/src/com/cyanogenmod/settings/device/DeviceSettings.java
index e131654..d5d7838 100644
--- a/GNexusParts/src/com/cyanogenmod/settings/device/DeviceSettings.java
+++ b/GNexusParts/src/com/cyanogenmod/settings/device/DeviceSettings.java
@@ -45,6 +45,7 @@ public class DeviceSettings extends Activity {
     public static final String KEY_GAMMA_TUNING = "gamma_tuning";
     public static final String KEY_CATEGORY_RADIO = "category_radio";
     public static final String KEY_HSPA = "hspa";
+    public static final String KEY_USB_FAST_CHARGE = "fast_charge_usb";
 
     ViewPager mViewPager;
     TabsAdapter mTabsAdapter;
diff --git a/GNexusParts/src/com/cyanogenmod/settings/device/GeneralFragmentActivity.java b/GNexusParts/src/com/cyanogenmod/settings/device/GeneralFragmentActivity.java
index ca1b155..17644e6 100644
--- a/GNexusParts/src/com/cyanogenmod/settings/device/GeneralFragmentActivity.java
+++ b/GNexusParts/src/com/cyanogenmod/settings/device/GeneralFragmentActivity.java
@@ -27,6 +27,7 @@ import android.preference.PreferenceFragment;
 import android.preference.PreferenceManager;
 import android.preference.PreferenceScreen;
 import android.util.Log;
+import android.view.View;
 
 import com.cyanogenmod.settings.device.R;
 
@@ -34,6 +35,9 @@ public class GeneralFragmentActivity extends PreferenceFragment {
 
     private static final String PREF_ENABLED = "1";
     private static final String TAG = "GNexusParts_General";
+    private static final String USB_FAST_CHARGE_FILE = "/sys/kernel/fast_charge/force_fast_charge";
+
+    private CheckBoxPreference mUSBFastCharge;
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
@@ -42,6 +46,13 @@ public class GeneralFragmentActivity extends PreferenceFragment {
         addPreferencesFromResource(R.xml.general_preferences);
 
         PreferenceScreen prefSet = getPreferenceScreen();
+        mUSBFastCharge = (CheckBoxPreference) findPreference(DeviceSettings.KEY_USB_FAST_CHARGE);
+
+        if (isSupported(USB_FAST_CHARGE_FILE)) {
+            mUSBFastCharge.setChecked(PREF_ENABLED.equals(Utils.readOneLine(USB_FAST_CHARGE_FILE)));
+        } else {
+            mUSBFastCharge.setEnabled(false);
+        }
 
     }
 
@@ -53,6 +64,12 @@ public class GeneralFragmentActivity extends PreferenceFragment {
 
         Log.w(TAG, "key: " + key);
 
+        if (key.equals(DeviceSettings.KEY_USB_FAST_CHARGE)) {
+            final CheckBoxPreference chkPref = (CheckBoxPreference) preference;
+            boxValue = chkPref.isChecked() ? "1" : "0";
+            Utils.writeValue(USB_FAST_CHARGE_FILE, boxValue);
+        }
+
         return true;
     }
 
@@ -62,5 +79,10 @@ public class GeneralFragmentActivity extends PreferenceFragment {
 
     public static void restore(Context context) {
         SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
+        if (isSupported(USB_FAST_CHARGE_FILE)) {
+            String sDefaultValue = Utils.readOneLine(USB_FAST_CHARGE_FILE);
+            Utils.writeValue(USB_FAST_CHARGE_FILE, sharedPrefs.getBoolean(DeviceSettings.KEY_USB_FAST_CHARGE,
+                             PREF_ENABLED.equals(sDefaultValue)));
+        }
     }
 }