dt-bindings: Add PCIe supports-clkreq property
authorVidya Sagar <vidyas@nvidia.com>
Tue, 13 Aug 2019 11:36:23 +0000 (17:06 +0530)
committerLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tue, 13 Aug 2019 15:00:58 +0000 (16:00 +0100)
commit7b31a72e7195aebd620d504f28b97ad8398e95ec
treeacce796209c682490c637fdc9245a2d869cdc49f
parent07f123def73e07e398537be7a5b43a244cb0cbf3
dt-bindings: Add PCIe supports-clkreq property

Some host controllers need to know the existence of clkreq signal routing
to downstream devices to be able to advertise low power features like
ASPM L1 substates. Without clkreq signal routing being present, enabling
ASPM L1 substates might lead to downstream devices being disconnected
from the bus. Hence a new device tree property 'supports-clkreq' is added
to make such host controllers aware of clkreq signal routing to
downstream devices.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Documentation/devicetree/bindings/pci/pci.txt