commit f18ec9f227b8298467cc5288bc4a85c76526d67e
author Ruchi Kandoi <kandoiruchi@google.com> Mon Sep 28 13:35:59 2015 -0700
committer Ruchi Kandoi <kandoiruchi@google.com> Fri Oct 09 13:18:09 2015 -0700
tree 7c801139b7f329bced725a517a314623b71c0c8a
parent e29d5ef8892d2ce271eb18a6364dce1012383a01

healthd: Adds fake battery properties for devices with no battery.

Devices which have no battery and are always plugged in will not have
any battery property initialized. This causes the 'stable power' to
never be switched which is required for updating apps.

This change recognizes such a device and manually sets the battery to
100% and charger status to connected to AC mains. It will also fake the
battery temperature.

Bug: 24258855
Change-Id: I98e5ed0dbeb7f2ab6d3802cd7e0f3a269bd8f31f
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>

healthd/BatteryMonitor.cpp

diff --git a/healthd/BatteryMonitor.cpp b/healthd/BatteryMonitor.cpp
index cb77a8e..ae63890 100644
--- a/healthd/BatteryMonitor.cpp
+++ b/healthd/BatteryMonitor.cpp
@@ -39,6 +39,7 @@
 #define POWER_SUPPLY_SYSFS_PATH "/sys/class/" POWER_SUPPLY_SUBSYSTEM
 #define FAKE_BATTERY_CAPACITY 42
 #define FAKE_BATTERY_TEMPERATURE 424
+#define ALWAYS_PLUGGED_CAPACITY 100
 
 namespace android {
 
@@ -208,6 +209,15 @@
         mBatteryFixedTemperature :
         getIntField(mHealthdConfig->batteryTemperaturePath);
 
+    // For devices which do not have battery and are always plugged
+    // into power souce.
+    if (mAlwaysPluggedDevice) {
+        props.chargerAcOnline = true;
+        props.batteryPresent = true;
+        props.batteryStatus = BATTERY_STATUS_CHARGING;
+        props.batteryHealth = BATTERY_HEALTH_GOOD;
+    }
+
     const int SIZE = 128;
     char buf[SIZE];
     String8 btech;
@@ -590,8 +600,12 @@
         closedir(dir);
     }
 
-    if (!mChargerNames.size())
+    if (!mChargerNames.size()) {
         KLOG_ERROR(LOG_TAG, "No charger supplies found\n");
+        mBatteryFixedCapacity = ALWAYS_PLUGGED_CAPACITY;
+        mBatteryFixedTemperature = FAKE_BATTERY_TEMPERATURE;
+        mAlwaysPluggedDevice = true;
+    }
     if (!mBatteryDevicePresent) {
         KLOG_WARNING(LOG_TAG, "No battery devices found\n");
         hc->periodic_chores_interval_fast = -1;
@@ -611,7 +625,7 @@
             KLOG_WARNING(LOG_TAG, "BatteryTemperaturePath not found\n");
         if (mHealthdConfig->batteryTechnologyPath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryTechnologyPath not found\n");
-	if (mHealthdConfig->batteryCurrentNowPath.isEmpty())
+        if (mHealthdConfig->batteryCurrentNowPath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryCurrentNowPath not found\n");
         if (mHealthdConfig->batteryFullChargePath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryFullChargePath not found\n");