I want to use the SmartReflex to change the Vdd1 voltage of BeagleBoard C4.
I have tried with the Linux kernel 2.6.32 version that is verified by TI, and there is no problem. Every time I changed the CPU frequency (with cpufreq-set), the vdd1 voltage is also changed. And in this case, I can find the file sr_vdd1_autocomp under the directory /sys/power/.
Anyway, when I use another Linux kernel version 3.3.0-rc7, the voltage cannot change along with the CPU frequency, and I cannot find the file sr_vdd1_autocomp under the directory /sys/power/.
Anyone have an idea on how the SmartReflex driver can be added into the kernel? Maybe through Linux menuconfig or any patch to the Linux kernel source?
PS: here I found is one reference on SmartReflex is regarding to OMAP3: http://www.webos-internals.org/wiki/Patch_webOS_CPU_Frequency_or_Voltage_Scaling#SmartReflex
Thanks in advance!