Linux内核使用来自不同驱动程序树的标头

Question

I am trying to include the gpu_ipa header from the mali driver directory tree in my 3.10.9 android kernel within my cpufreq module. I have been looking through the make files but cannot make sense of how I am meant to include the mali directories in the make config for my module, in the cpufreq driver directory.

Just to elaborate if not quite clear.

In my module (optigame_governor.c/h) I have

#include "gpu_ipa.h"

In my cpufreq makefile

obj-$(CONFIG_CPU_FREQ_GOV_OPTIGAME) += optigame_governor.o

no includes :(

The file structure between my module and the target header looks like

kernel---drivers---cpufreq---optigame_governor.c/h
                \--gpu---arm---midgard---platform---gpu_ipa.h

I am not 100% sure if this is the exact file I need but I will need something in this other driver branch and so am looking for a somewhat generalized solution.

Cheers

Answer 1

I was able to solve my problem using the ccflags mentioned in the comments.

Adding

ccflags-$(CONFIG_CPU_FREQ_GOV_OPTIGAME) += -Idrivers/gpu/arm/midgard

to my cpufreq Makefile and adding

#include <platform/gpu_ipa.h>

to my c file solved the problem. Problem was due to not using absolute paths.