打开ccache后编译android果然快很多。
make rk3188_sdk_defconfig
触摸屏有问题，然后再吧input底下的touchscreen 屏蔽掉
james@james-OptiPlex-380:~/android/RK3188_Pad/4.2.2_r1/kernel/arch/arm$ find -name *.o
./kernel/sched_clock.o
./kernel/fiq.o
./kernel/smp.o
./kernel/swp_emulate.o
./kernel/entry-common.o
./kernel/stacktrace.o
./kernel/module.o
./kernel/process.o
./kernel/entry-armv.o
./kernel/return_address.o
./kernel/traps.o
./kernel/built-in.o
./kernel/pmu.o
./kernel/irq.o
./kernel/smp_tlb.o
./kernel/debug.o
./kernel/head.o
./kernel/sleep.o
./kernel/signal.o
./kernel/armksyms.o
./kernel/ptrace.o
./kernel/time.o
./kernel/io.o
./kernel/sys_arm.o
./kernel/smp_scu.o
./kernel/init_task.o
./kernel/elf.o
./kernel/setup.o
./kernel/fiqasm.o
./kernel/unwind.o
./vfp/built-in.o
./vfp/vfpdouble.o
./vfp/vfp.o
./vfp/vfpsingle.o
./vfp/entry.o
./vfp/vfpmodule.o
./vfp/vfphw.o
./mm/pgd.o
./mm/context.o
./mm/mmu.o
./mm/flush.o
./mm/mmap.o
./mm/built-in.o
./mm/abort-ev7.o
./mm/highmem.o
./mm/proc-v7.o
./mm/iomap.o
./mm/cache-v7.o
./mm/ioremap.o
./mm/pabort-v7.o
./mm/extable.o
./mm/alignment.o
./mm/dma-mapping.o
./mm/cache-l2x0.o
./mm/idmap.o
./mm/tlb-v7.o
./mm/copypage-v6.o
./mm/fault-armv.o
./mm/init.o
./mm/vmregion.o
./mm/proc-syms.o
./mm/fault.o
./boot/compressed/head.o
./plat-rk/fiq.o
./plat-rk/ddr_freq.o
./plat-rk/mem_reserve.o
./plat-rk/usb_detect.o
./plat-rk/efuse.o
./plat-rk/built-in.o
./plat-rk/dma-pl330.o
./plat-rk/rk_timer.o
./plat-rk/rk_fiq_debugger.o
./plat-rk/cpu.o
./plat-rk/clock.o
./plat-rk/pwm.o
./plat-rk/config.o
./plat-rk/early_printk.o
./plat-rk/iomux.o
./plat-rk/last_log.o
./plat-rk/dvfs.o
./plat-rk/sram.o
./lib/csumpartialcopy.o
./lib/strrchr.o
./lib/memchr.o
./lib/io-writesw-armv4.o
./lib/memcpy.o
./lib/io-readsl.o
./lib/putuser.o
./lib/copy_from_user.o
./lib/io-readsw-armv4.o
./lib/testchangebit.o
./lib/memmove.o
./lib/clear_user.o
./lib/testsetbit.o
./lib/ashldi3.o
./lib/io-writesb.o
./lib/built-in.o
./lib/ucmpdi2.o
./lib/io-readsb.o
./lib/getuser.o
./lib/csumipv6.o
./lib/memzero.o
./lib/copy_to_user.o
./lib/changebit.o
./lib/sha1.o
./lib/csumpartial.o
./lib/backtrace.o
./lib/strnlen_user.o
./lib/io-writesl.o
./lib/muldi3.o
./lib/strncpy_from_user.o
./lib/delay.o
./lib/strchr.o
./lib/testclearbit.o
./lib/csumpartialcopyuser.o
./lib/div64.o
./lib/memset.o
./lib/setbit.o
./lib/ashrdi3.o
./lib/lib1funcs.o
./lib/lshrdi3.o
./lib/clearbit.o
./lib/copy_page.o
./lib/findbit.o
./mach-rk30/headsmp.o
./mach-rk30/cpuidle.o
./mach-rk30/common.o
./mach-rk30/ddr.o
./mach-rk30/pmu.o
./mach-rk30/platsmp.o
./mach-rk30/hotplug.o
./mach-rk30/pm.o
./mach-rk30/reset.o
./mach-rk30/devices.o
./mach-rk3188/board.o
./mach-rk3188/board-rk3188-sdk.o
./mach-rk3188/built-in.o
./mach-rk3188/clock_data.o
./mach-rk3188/rk_timer.o
./mach-rk3188/cpufreq.o
./mach-rk3188/io.o
./mach-rk3188/dvfs.o
./common/gic.o
./common/built-in.o
./common/fiq_glue.o
./common/fiq_debugger.o
./common/fiq_glue_setup.o
./common/pl330.o
确定关键修改代码为mach-rk3188/board-rk3188-sdk.c