kukzile / linux Goto Github PK

Linux Kernel for Odroid Xu3 with the following changes-
1) Updated DTS file for 4480 us update period for power sensor
2) Additional governor called performance2 for DVFS

If you wish to add a governor, then make changed in the following files:
1) /drivers/cpufreq/cpufrex_xxx.c - Your governor
2) /include/linux/cpufreq.h
3) /drivers/cpufreq/cpufreq.c
4) /drivers/cpufreq/Makefile
5) /drivers/cpufreq/Kconfig

Refer below  for additional details: 
Changes in Kconfig file: 
[CODE]
config CPU_FREQ_DEFAULT_PERFORMANCE2
bool “Performance2”
select CPU_FREQ_GOV_PERFORMANCE2
help
Use the CPUFreq governor ‘P2’ as default.
[/CODE]

and these lines:

[CODE]
config CPU_FREQ_GOV_PERFORMANCE2
tristate “‘performance2’ cpufreq performance2”
depends on CPU_FREQ
help
‘P2’ 
[/CODE]

And edited the Makefile in that folder to say:

[CODE]
# CPUfreq governors
obj-$(CONFIG_CPU_FREQ_GOV_PERFORMANCE) += cpufreq_performance.o
obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE) += cpufreq_powersave.o
obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE) += cpufreq_userspace.o
obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND) += cpufreq_ondemand.o
obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o
obj-$(CONFIG_CPU_FREQ_GOV_INTERACTIVE) += cpufreq_interactive.o
obj-$(CONFIG_CPU_FREQ_GOV_YANKACTIVE) += cpufreq_performance2.o
[/CODE]

And finaly, I added these lines to the cpufreq.h file:

[CODE]
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE2)
extern struct cpufreq_governor cpufreq_gov_performance2;
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance2)
[/CODE]