记录，以备用：
android4.0的源码是2011-11-15公开的。
http://source.android.com/source/downloading.html
GoldFish平台相关的驱动文件如下:
1. 字符输出设备:
kernel/drivers/char/goldfish_tty.c
2. 图象显示设备: (Frame Buffer)
kernel/drivers/video/goldfishfb.c
3. 键盘输入设备:
kernel/drivers/input/keyboard/goldfish_events.c
4. RTC设备: (Real Time Clock)
kernel/drivers/rtc/rtc-goldfish.c
5. USB Device设备:
kernel/drivers/usb/gadget/android_adb.c
6. SD卡设备:
kernel/drivers/mmc/host/goldfish.c
7. FLASH设备:
kernel/drivers/mtd/devices/goldfish_nand.c
kernel/drivers/mtd/devices/goldfish_nand_reg.h
8. LED设备:
kernel/drivers/leds/ledtrig-sleep.c
9. 电源设备:
kernel/drivers/power/goldfish_battery.c
10. 音频设备:
kernel/arch/arm/mach-goldfish/audio.c
11. 电源管理:
kernel/arch/arm/mach-goldfish/pm.c
12. 时钟管理:
kernel/arch/arm/mach-goldfish/timer.c