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authorBjorn Helgaas <bhelgaas@google.com>2019-11-28 17:54:29 +0300
committerBjorn Helgaas <bhelgaas@google.com>2019-11-28 17:54:29 +0300
commitabd05c97f9711a4baa8cd43832893b8df45d459e (patch)
treec2ec4d6561dcc45bd87db28ade6a212dcdc29a19 /Documentation
parentc2a3d213d1bc007683f63790b1cf522d5586d1a8 (diff)
parent87e90283c94c76ee11d379ab5a0973382bbd0baf (diff)
downloadlinux-abd05c97f9711a4baa8cd43832893b8df45d459e.tar.xz
Merge branch 'pci/aspm'
- Remove unnecessary ASPM locking (Bjorn Helgaas) - Add support for disabling L1 PM Substates (Heiner Kallweit) - Allow re-enabling Clock PM after it has been disabled (Heiner Kallweit) - Add sysfs attributes for controlling ASPM link states (Heiner Kallweit) - Remove CONFIG_PCIEASPM_DEBUG, including "link_state" and "clk_ctl" sysfs files (Heiner Kallweit) * pci/aspm: PCI/ASPM: Remove PCIEASPM_DEBUG Kconfig option and related code PCI/ASPM: Add sysfs attributes for controlling ASPM link states PCI/ASPM: Add pcie_aspm_get_link() PCI/ASPM: Allow re-enabling Clock PM PCI/ASPM: Add L1 PM substate support to pci_disable_link_state() PCI/ASPM: Remove pcie_aspm_enabled() unnecessary locking
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-pci13
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 8bfee557e50e..450296cc7948 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -347,3 +347,16 @@ Description:
If the device has any Peer-to-Peer memory registered, this
file contains a '1' if the memory has been published for
use outside the driver that owns the device.
+
+What: /sys/bus/pci/devices/.../link/clkpm
+ /sys/bus/pci/devices/.../link/l0s_aspm
+ /sys/bus/pci/devices/.../link/l1_aspm
+ /sys/bus/pci/devices/.../link/l1_1_aspm
+ /sys/bus/pci/devices/.../link/l1_2_aspm
+ /sys/bus/pci/devices/.../link/l1_1_pcipm
+ /sys/bus/pci/devices/.../link/l1_2_pcipm
+Date: October 2019
+Contact: Heiner Kallweit <hkallweit1@gmail.com>
+Description: If ASPM is supported for an endpoint, these files can be
+ used to disable or enable the individual power management
+ states. Write y/1/on to enable, n/0/off to disable.