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authorHuang Ying <ying.huang@intel.com>2012-08-08 09:07:41 +0800
committerBjorn Helgaas <bhelgaas@google.com>2012-08-21 17:36:33 -0600
commit046c6531b60e8b9eabf47820a06161338a612167 (patch)
tree8fb963061b2f1162c8801f85b402df2a65382026 /Documentation
parent3d8387efe1ad9eb5bfe8a2e58cdbd1b88b247eef (diff)
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PCI/PM: Add ABI document for sysfs file d3cold_allowed
This patch adds ABI document for the following sysfs file: /sys/bus/pci/devices/.../d3cold_allowed Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-pci12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 34f5110..dff1f48 100644
--- 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 <ying.huang@intel.com>
+Description:
+ 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.