Document "reset-gpio" optional property which supports GPIO based PERST#
signal.
Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx>
---
V2: Using standard "reset-gpio" property
.../devicetree/bindings/pci/nvidia,tegra20-pcie.txt | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
index 7939bca47861..4e75e017f660 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
@@ -162,6 +162,10 @@ Required properties:
- Root port 0 uses 4 lanes, root port 1 is unused.
- Both root ports use 2 lanes.
+Optional properties:
+- reset-gpio: If GPIO is used as PERST# signal instead of available
+ SFIO, add this property with phandle to GPIO controller and GPIO number.
+
Required properties for Tegra124 and later:
- phys: Must contain an phandle to a PHY for each entry in phy-names.
- phy-names: Must include an entry for each active lane. Note that the number
@@ -626,6 +630,7 @@ SoC DTSI:
ranges;
nvidia,num-lanes = <2>;
+ reset-gpio = <&gpio TEGRA_GPIO(A, 3) 0>;
};
pci@2,0 {
--
2.17.1
