From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Manikanta Maddireddy Subject: [PATCH 23/30] dt-bindings: pci: tegra: Document PCIe DPD pinctrl optional prop Date: Thu, 11 Apr 2019 22:33:48 +0530 Message-ID: <20190411170355.6882-24-mmaddireddy@nvidia.com> In-Reply-To: <20190411170355.6882-1-mmaddireddy@nvidia.com> References: <20190411170355.6882-1-mmaddireddy@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain To: thierry.reding@gmail.com, bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com, jonathanh@nvidia.com, lorenzo.pieralisi@arm.com, vidyas@nvidia.com Cc: linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, Manikanta Maddireddy List-ID: Document PCIe DPD pinctrl optional property to put PEX clk & BIAS pads in low power mode. Signed-off-by: Manikanta Maddireddy --- .../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