summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/phy
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/phy')
-rw-r--r--Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt106
1 files changed, 106 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt b/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt
new file mode 100644
index 000000000000..e11c563a65ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt
@@ -0,0 +1,106 @@
+Qualcomm QMP PHY controller
+===========================
+
+QMP phy controller supports physical layer functionality for a number of
+controllers on Qualcomm chipsets, such as, PCIe, UFS, and USB.
+
+Required properties:
+ - compatible: compatible list, contains:
+ "qcom,msm8996-qmp-pcie-phy" for 14nm PCIe phy on msm8996,
+ "qcom,msm8996-qmp-usb3-phy" for 14nm USB3 phy on msm8996.
+
+ - reg: offset and length of register set for PHY's common serdes block.
+
+ - #clock-cells: must be 1
+ - Phy pll outputs a bunch of clocks for Tx, Rx and Pipe
+ interface (for pipe based PHYs). These clock are then gate-controlled
+ by gcc.
+ - #address-cells: must be 1
+ - #size-cells: must be 1
+ - ranges: must be present
+
+ - clocks: a list of phandles and clock-specifier pairs,
+ one for each entry in clock-names.
+ - clock-names: "cfg_ahb" for phy config clock,
+ "aux" for phy aux clock,
+ "ref" for 19.2 MHz ref clk,
+ For "qcom,msm8996-qmp-pcie-phy" must contain:
+ "aux", "cfg_ahb", "ref".
+ For "qcom,msm8996-qmp-usb3-phy" must contain:
+ "aux", "cfg_ahb", "ref".
+
+ - resets: a list of phandles and reset controller specifier pairs,
+ one for each entry in reset-names.
+ - reset-names: "phy" for reset of phy block,
+ "common" for phy common block reset,
+ "cfg" for phy's ahb cfg block reset (Optional).
+ For "qcom,msm8996-qmp-pcie-phy" must contain:
+ "phy", "common", "cfg".
+ For "qcom,msm8996-qmp-usb3-phy" must contain
+ "phy", "common".
+
+ - vdda-phy-supply: Phandle to a regulator supply to PHY core block.
+ - vdda-pll-supply: Phandle to 1.8V regulator supply to PHY refclk pll block.
+
+Optional properties:
+ - vddp-ref-clk-supply: Phandle to a regulator supply to any specific refclk
+ pll block.
+
+Required nodes:
+ - Each device node of QMP phy is required to have as many child nodes as
+ the number of lanes the PHY has.
+
+Required properties for child node:
+ - reg: list of offset and length pairs of register sets for PHY blocks -
+ tx, rx and pcs.
+
+ - #phy-cells: must be 0
+
+ - clocks: a list of phandles and clock-specifier pairs,
+ one for each entry in clock-names.
+ - clock-names: Must contain following for pcie and usb qmp phys:
+ "pipe<lane-number>" for pipe clock specific to each lane.
+
+ - resets: a list of phandles and reset controller specifier pairs,
+ one for each entry in reset-names.
+ - reset-names: Must contain following for pcie qmp phys:
+ "lane<lane-number>" for reset specific to each lane.
+
+Example:
+ phy@34000 {
+ compatible = "qcom,msm8996-qmp-pcie-phy";
+ reg = <0x34000 0x488>;
+ #clock-cells = <1>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ clocks = <&gcc GCC_PCIE_PHY_AUX_CLK>,
+ <&gcc GCC_PCIE_PHY_CFG_AHB_CLK>,
+ <&gcc GCC_PCIE_CLKREF_CLK>;
+ clock-names = "aux", "cfg_ahb", "ref";
+
+ vdda-phy-supply = <&pm8994_l28>;
+ vdda-pll-supply = <&pm8994_l12>;
+
+ resets = <&gcc GCC_PCIE_PHY_BCR>,
+ <&gcc GCC_PCIE_PHY_COM_BCR>,
+ <&gcc GCC_PCIE_PHY_COM_NOCSR_BCR>;
+ reset-names = "phy", "common", "cfg";
+
+ pciephy_0: lane@35000 {
+ reg = <0x35000 0x130>,
+ <0x35200 0x200>,
+ <0x35400 0x1dc>;
+ #phy-cells = <0>;
+
+ clocks = <&gcc GCC_PCIE_0_PIPE_CLK>;
+ clock-names = "pipe0";
+ resets = <&gcc GCC_PCIE_0_PHY_BCR>;
+ reset-names = "lane0";
+ };
+
+ pciephy_1: lane@36000 {
+ ...
+ ...
+ };