Document "nvidia,rst-gpio" optional property which supports GPIO based
PERST# signal.
Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx>
---
Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
index dca8393b86d1..23928fd59538 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
@@ -75,6 +75,8 @@ Optional properties:
Pass pinctrl phandle to allow driver bring PCIe IO out of DPD state.
- nvidia,plat-gpios: A list of platform specific gpios which controls
endpoint's internal regulator or PCIe logic.
+- nvidia,rst-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 on Tegra124 and later (deprecated):
- phys: Must contain an entry for each entry in phy-names.
@@ -671,6 +673,7 @@ Board DTS:
pci@1,0 {
nvidia,num-lanes = <4>;
+ nvidia,rst-gpio = <&tegra_main_gpio TEGRA_MAIN_GPIO(A, 3) 0>;
status = "okay";
};
--
2.17.1
