[PATCH V4 23/28] dt-bindings: pci: tegra: Document PCIe DPD pinctrl optional prop

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Document PCIe DPD pinctrl optional property to put PEX clk & BIAS pads
in low power mode.

Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Acked-by: Thierry Reding <treding@xxxxxxxxxx>
---
V4: No change

V3: No change

V2: Using standard pinctrl names, default and idle

 .../devicetree/bindings/pci/nvidia,tegra20-pcie.txt       | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
index 145a4f04194f..7939bca47861 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
@@ -65,6 +65,14 @@ Required properties:
   - afi
   - pcie_x
 
+Optional properties:
+- pinctrl-names: A list of pinctrl state names. Must contain the following
+  entries:
+  - "default": active state, puts PCIe I/O out of deep power down state
+  - "idle": puts PCIe I/O into deep power down state
+- pinctrl-0: phandle for the default/active state of pin configurations.
+- pinctrl-1: phandle for the idle state of pin configurations.
+
 Required properties on Tegra124 and later (deprecated):
 - phys: Must contain an entry for each entry in phy-names.
 - phy-names: Must include the following entries:
-- 
2.17.1




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