Merge "Use new EVIOCSCLOCKID ioctl if supported."

    // Enable wake-lock behavior on kernels that support it.

    // TODO: Only need this for devices that can really wake the system.

    bool usingSuspendBlock = ioctl(fd, EVIOCSSUSPENDBLOCK, 1) == 0;

    bool usingSuspendBlockIoctl = !ioctl(fd, EVIOCSSUSPENDBLOCK, 1);

    // Tell the kernel that we want to use the monotonic clock for reporting timestamps

    // associated with input events.  This is important because the input system

    // uses the timestamps extensively and assumes they were recorded using the monotonic

    // clock.

    //

    // In older kernel, before Linux 3.4, there was no way to tell the kernel which

    // clock to use to input event timestamps.  The standard kernel behavior was to

    // record a real time timestamp, which isn't what we want.  Android kernels therefore

    // contained a patch to the evdev_event() function in drivers/input/evdev.c to

    // replace the call to do_gettimeofday() with ktime_get_ts() to cause the monotonic

    // clock to be used instead of the real time clock.

    //

    // As of Linux 3.4, there is a new EVIOCSCLOCKID ioctl to set the desired clock.

    // Therefore, we no longer require the Android-specific kernel patch described above

    // as long as we make sure to set select the monotonic clock.  We do that here.

    bool usingClockIoctl = !ioctl(fd, EVIOCSCLOCKID, CLOCK_MONOTONIC);

    ALOGI("New device: id=%d, fd=%d, path='%s', name='%s', classes=0x%x, "

            "configuration='%s', keyLayout='%s', keyCharacterMap='%s', builtinKeyboard=%s, "

            "usingSuspendBlock=%s",

            "usingSuspendBlockIoctl=%s, usingClockIoctl=%s",

         deviceId, fd, devicePath, device->identifier.name.string(),

         device->classes,

         device->configurationFile.string(),

         device->keyMap.keyLayoutFile.string(),

         device->keyMap.keyCharacterMapFile.string(),

         toString(mBuiltInKeyboardId == deviceId),

         toString(usingSuspendBlock));

         toString(usingSuspendBlockIoctl), toString(usingClockIoctl));

    mDevices.add(deviceId, device);