TI中文支持网
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：http://processors.wiki.ti.com/index.php/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。
Steven Liu1：
1. 是说唤醒失败了吗？
2. 请参考：http://processors.wiki.ti.com/index.php/AM335x_Linux_Power_Management_User_Guide
kun huang2：
回复 Steven Liu1:
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
kun huang2：
回复 kun huang2:
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
