dt-bindings: phy: Add support for QUSB2 phy

Qualcomm chipsets have QUSB2 phy controller that provides
HighSpeed functionality for DWC3 controller.
Adding dt binding information for the same.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/phy/qcom-qusb2-phy.txt b/Documentation/devicetree/bindings/phy/qcom-qusb2-phy.txt
new file mode 100644
index 0000000000000..38c8b302a7f45
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/qcom-qusb2-phy.txt
@@ -0,0 +1,55 @@
+Qualcomm QUSB2 phy controller
+=============================
+
+QUSB2 controller supports LS/FS/HS usb connectivity on Qualcomm chipsets.
+
+Required properties:
+ - compatible: compatible list, contains "qcom,msm8996-qusb2-phy".
+ - reg: offset and length of the PHY register set.
+ - #phy-cells: must be 0.
+
+ - clocks: a list of phandles and clock-specifier pairs,
+	   one for each entry in clock-names.
+ - clock-names: must be "cfg_ahb" for phy config clock,
+			"ref_clk" for 19.2 MHz ref clk,
+			"ref_clk_src" reference clock source.
+			"iface" for phy interface clock (Optional).
+
+ - vdd-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.
+ - vdda-phy-dpdm: Phandle to 3.1V regulator supply to Dp/Dm port signals.
+
+ - resets: a list of phandles and reset controller specifier pairs,
+	   one for each entry in reset-names.
+ - reset-names: must be "phy" for reset of phy block.
+
+Optional properties:
+ - nvmem-cells: a list of phandles to nvmem cells that contain fused
+		tuning parameters for qusb2 phy, one for each entry
+		in nvmem-cell-names.
+ - nvmem-cell-names: must be "tune2_hstx_trim_efuse" for cell containing
+		     HS Tx trim value.
+
+ - qcom,tcsr-syscon: Phandle to TCSR syscon register region.
+
+Example:
+	hsphy: qusb2phy@7411000 {
+		compatible = "qcom,msm8996-qusb2-phy";
+		reg = <0x07411000 0x180>;
+		#phy-cells = <0>;
+
+		clocks = <&gcc GCC_USB_PHY_CFG_AHB2PHY_CLK>,
+			<&gcc GCC_RX1_USB2_CLKREF_CLK>,
+			<&rpmcc MSM8996_RPM_SMD_LN_BB_CLK>;
+		clock-names = "cfg_ahb_clk", "ref_clk", "ref_clk_src";
+
+		vdd-phy-supply = <&pm8994_s2>;
+		vdda-pll-supply = <&pm8994_l12>;
+		vdda-phy-dpdm-supply = <&pm8994_l24>;
+
+		resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>;
+		reset-names = "phy";
+
+		nvmem-cells = <&qusb2p_hstx_trim>;
+		nvmem-cell-names = "tune2_hstx_trim_efuse";
+        };