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am335x 休眠与唤醒 ？

kun huang2
Expert 1010 points


   

1.   在用am335x休眠的时候出现了一些问题：

   PM: Syncing filesystems ... done.                                
[  355.393157] PM: Preparing system for standby sleep                           
[  355.399017] am33xx_sr_cpufreq_transition: prechange                          
[  355.404418] am33xx_sr_cpufreq_transition: postchange                         
[  355.409698] am33xx_sr_cpufreq_transition: postchange, new opp=0              
[  355.492004] Freezing user space processes ... (elapsed 0.01 seconds) done.   
[  355.519287] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) do.
[  355.539245] PM: Entering standby sleep                                       
[  355.543212] Suspending console(s) (use no_console_suspend to debug)          
[  355.560363] pm_op(): platform_pm_suspend+0x0/0x5c returns -16                
[  355.560424] PM: Device musb-hdrc.0 failed to suspend: error -16              
[  355.560424] PM: Some devices failed to suspend                               
[  355.710449] net eth0: CPSW phy found : id is : 0x7c0f1                       
[  355.713684] PM: resume of devices complete after 153.198 msecs               
[  355.742584] PM: Finishing wakeup.                                            
[  355.746063] Restarting tasks ... done.                                       
[  355.828765] am33xx_sr_cpufreq_transition: prechange                          
[  355.834136] am33xx_sr_cpufreq_transition: postchange                         
[  355.839324] am33xx_sr_cpufreq_transition: postchange, new opp=4              
-sh: echo: write error: Device or resource busy                

    请问是怎么回事？

2.在看功耗的文档：processors.wiki.ti.com/.../AM335x_Power_Consumption_Summary

如何进入低功耗模式，DS0，DS1，Active Power，需要测试每个的功耗。



  • 0 回复 Steven Liu1
    Expert 1010 points

    Steven Liu 你好！

       1.   是休眠失败，进不了休眠，

       2.  还有是想问如何进入低功耗，DS0，DS1

  • 0 回复 kun huang2
    Expert 1010 points

    谁能回答我这个问题？ 进入休眠是:~# echo mem > /sys/power/state                                  
    [  334.976409] PM: Syncing filesystems ... done.                                
    [  337.727722] PM: Preparing system for mem sleep                               
    [  337.732879] am33xx_sr_cpufreq_transition: prechange                          
    [  337.738281] am33xx_sr_cpufreq_transition: postchange                         
    [  337.743530] am33xx_sr_cpufreq_transition: postchange, new opp=0              
    [  337.826446] Freezing user space processes ... (elapsed 0.01 seconds) done.   
    [  337.848754] Freezing remaining freezable tasks ... (elapsed 0.01 seconds) do.
    [  337.868743] PM: Entering mem sleep                                           
    [  337.872375] Suspending console(s) (use no_console_suspend to debug)          
    [  337.892669] pm_op(): platform_pm_suspend+0x0/0x5c returns -16                
    [  337.892700] PM: Device musb-hdrc.0 failed to suspend: error -16              
    [  337.892730] PM: Some devices failed to suspend                               
    [  338.040557] net eth0: CPSW phy found : id is : 0x7c0f1                       
    [  338.043762] PM: resume of devices complete after 151.000 msecs               
    [  338.072692] PM: Finishing wakeup.                                            
    [  338.076202] Restarting tasks ... done.                                       
    [  338.159088] am33xx_sr_cpufreq_transition: prechange                          
    [  338.164428] am33xx_sr_cpufreq_transition: postchange                         
    [  338.169647] am33xx_sr_cpufreq_transition: postchange, new opp=4              
    -sh: echo: write error: Device or resource busy       

    这个设备关不了？

    急急