Patchwork [4/4] PCI/PM: Add ABI document for sysfs file d3cold_allowed

mail settings
Submitter Huang Ying
Date Aug. 3, 2012, 6:30 a.m.
Message ID <>
Download mbox | patch
Permalink /patch/174892/
State Superseded
Headers show


Huang Ying - Aug. 3, 2012, 6:30 a.m.
This patch adds ABI document for the following sysfs file:


Signed-off-by: Huang Ying <>
Acked-by: Rafael J. Wysocki <>
 Documentation/ABI/testing/sysfs-bus-pci |   12 ++++++++++++
 1 file changed, 12 insertions(+)

To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to
More majordomo info at


--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -210,3 +210,15 @@  Users:
 		firmware assigned instance number of the PCI
 		device that can help in understanding the firmware
 		intended order of the PCI device.
+What:		/sys/bus/pci/devices/.../d3cold_allowed
+Date:		July 2012
+Contact:	Huang Ying <>
+		d3cold_allowed is bit to control whether the corresponding PCI
+		device can be put into D3Cold state.  If it is cleared, the
+		device will never be put into D3Cold state.  If it is set, the
+		device may be put into D3Cold state if other requirements are
+		satisfied too.  Reading this attribute will show the current
+		value of d3cold_allowed bit.  Writing this attribute will set
+		the value of d3cold_allowed bit.