Document PCIe DPD pinctrl optional property to put PEX clk & BIAS pads in low power mode. Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx> --- .../devicetree/bindings/pci/nvidia,tegra20-pcie.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt index 145a4f04194f..fbbd3bcb3435 100644 --- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt @@ -65,6 +65,15 @@ Required properties: - afi - pcie_x +Optional properties: +- pinctrl-names : The pin control state names. +- pinctrl-0: PCIe IO(bias & REFCLK) deep power down(DPD) disable state. + In Tegra210 PCIe clamps are not controlling IO signals, so there + is leakagae power even after PCIe power partition is off. Pass + pinctrl phandle to allow driver to explicitly put PCIe IO in DPD state. +- pinctrl-1: PCIe IO(bias & REFCLK) deep power down(DPD) enable state. + Pass pinctrl phandle to allow driver bring PCIe IO out of DPD state. + 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
