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Message-ID: <BLU102-W1030ED196ED7B94722F2A7EB830@phx.gbl> Date: Tue, 24 Aug 2010 18:45:10 +0530 From: Raj Kumar <rajkumar278@...mail.com> To: <stern@...land.harvard.edu> CC: <linux-kernel@...r.kernel.org> Subject: Runtime power management during system resume Hi Alan, I have implemented the run time power management in my drivers. I have one issue regarding System resume. When the system sleep is triggered as it is mentioned that Power management core will increment the power_usage counter during prepare and decrements when complete is called. Now I have few questions: 1) When the system resume is done, it does not increase the power_usage counter. right? So Does then the driver need to update the power_usage counter with run time power management core and again set it to active means RPM_ACTIVE? 2) Suppose device is active, means its power_usage counter is already one, Now during system sleep, does the driver first suspend it with run time power management core and then continue System suspend? 3) Because I have seen the code of power management core and I did not see the that during system suspend, run time power management status is updated means RPM_SUSPENDED. right? What do you think? Regards Raj -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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