BTW, here is the kernel configurations related to SmartReflex (all that I 
can found): 


Symbol: OMAP_SMARTREFLEX [=y]                                           │  
  │ Type  : boolean                                                         
│  
  │ Prompt: SmartReflex support                                             
│  
  │   Defined at arch/arm/plat-omap/Kconfig:44                             
 │  
  │   Depends on: ARCH_OMAP [=y] && (ARCH_OMAP3 [=y] || ARCH_OMAP4 [=y]) && 
│  
  │   Location:                                                             
│  
  │     -> System Type                                                     
 │  
  │       -> TI OMAP Common Features                                       
 │  
  │                                                                         
│  
  │                                                                         
│  
  │ Symbol: OMAP_SMARTREFLEX_CLASS3 [=y]                                   
 │  
  │ Type  : boolean                                                         
│  
  │ Prompt: Class 3 mode of Smartreflex Implementation                     
 │  
  │   Defined at arch/arm/plat-omap/Kconfig:66                             
 │  
  │   Depends on: ARCH_OMAP [=y] && OMAP_SMARTREFLEX [=y] && TWL4030_CORE [ 
│  
  │   Location:                                                             
│  
  │     -> System Type                                                     
 │  
  │       -> TI OMAP Common Features                                       
 │  
  │         -> SmartReflex support (OMAP_SMARTREFLEX [=y])           



在 2013年11月15日星期五UTC+1下午1时27分00秒,JianguoWEI写道:

 

> Hi, guys
>
> 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! 
>
> Jianguo
>

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