1*836aedb1SRafael J. WysockiWhat: /sys/devices/.../real_power_state 2*836aedb1SRafael J. WysockiDate: January 2013 3*836aedb1SRafael J. WysockiContact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 4*836aedb1SRafael J. WysockiDescription: 5*836aedb1SRafael J. Wysocki The /sys/devices/.../real_power_state attribute is only present 6*836aedb1SRafael J. Wysocki for device objects representing ACPI device nodes that provide 7*836aedb1SRafael J. Wysocki power management methods and use ACPI power resources for power 8*836aedb1SRafael J. Wysocki management. 9*836aedb1SRafael J. Wysocki 10*836aedb1SRafael J. Wysocki If present, it contains a string representing the real ACPI 11*836aedb1SRafael J. Wysocki power state of the given device node as returned by the _PSC 12*836aedb1SRafael J. Wysocki control method or inferred from the configuration of power 13*836aedb1SRafael J. Wysocki resources. Its possible values, "D0", "D1", "D2", "D3hot", and 14*836aedb1SRafael J. Wysocki "D3cold", reflect the power state names defined by the ACPI 15*836aedb1SRafael J. Wysocki specification (ACPI 4 and above). 16*836aedb1SRafael J. Wysocki 17*836aedb1SRafael J. Wysocki In some situations the value of this attribute may be different 18*836aedb1SRafael J. Wysocki from the value of the /sys/devices/.../power_state attribute for 19*836aedb1SRafael J. Wysocki the same device object. If that happens, some shared power 20*836aedb1SRafael J. Wysocki resources used by the device node are only ON because of some 21*836aedb1SRafael J. Wysocki other devices using them at the moment. 22*836aedb1SRafael J. Wysocki 23*836aedb1SRafael J. Wysocki This attribute is read-only. 24