On Tue, Apr 23, 2019 at 02:58:23PM +0530, Manikanta Maddireddy wrote: > 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>; Nit: it's customary to put vendor-specific properties below generic ones. Thierry
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