1 Qualcomm QUSB2 phy controller
2 =============================
4 QUSB2 controller supports LS/FS/HS usb connectivity on Qualcomm chipsets.
7 - compatible: compatible list, contains
8 "qcom,msm8996-qusb2-phy" for 14nm PHY on msm8996,
9 "qcom,msm8998-qusb2-phy" for 10nm PHY on msm8998,
10 "qcom,sdm845-qusb2-phy" for 10nm PHY on sdm845.
12 - reg: offset and length of the PHY register set.
13 - #phy-cells: must be 0.
15 - clocks: a list of phandles and clock-specifier pairs,
16 one for each entry in clock-names.
17 - clock-names: must be "cfg_ahb" for phy config clock,
18 "ref" for 19.2 MHz ref clk,
19 "iface" for phy interface clock (Optional).
21 - vdda-pll-supply: Phandle to 1.8V regulator supply to PHY refclk pll block.
22 - vdda-phy-dpdm-supply: Phandle to 3.1V regulator supply to Dp/Dm port signals.
24 - resets: Phandle to reset to phy block.
27 - nvmem-cells: Phandle to nvmem cell that contains 'HS Tx trim'
28 tuning parameter value for qusb2 phy.
30 - qcom,tcsr-syscon: Phandle to TCSR syscon register region.
31 - qcom,imp-res-offset-value: It is a 6 bit value that specifies offset to be
32 added to PHY refgen RESCODE via IMP_CTRL1 register. It is a PHY
33 tuning parameter that may vary for different boards of same SOC.
34 This property is applicable to only QUSB2 v2 PHY (sdm845).
35 - qcom,hstx-trim-value: It is a 4 bit value that specifies tuning for HSTX
37 Possible range is - 15mA to 24mA (stepsize of 600 uA).
38 See dt-bindings/phy/phy-qcom-qusb2.h for applicable values.
39 This property is applicable to only QUSB2 v2 PHY (sdm845).
40 Default value is 22.2mA for sdm845.
41 - qcom,preemphasis-level: It is a 2 bit value that specifies pre-emphasis level.
42 Possible range is 0 to 15% (stepsize of 5%).
43 See dt-bindings/phy/phy-qcom-qusb2.h for applicable values.
44 This property is applicable to only QUSB2 v2 PHY (sdm845).
45 Default value is 10% for sdm845.
46 - qcom,preemphasis-width: It is a 1 bit value that specifies how long the HSTX
47 pre-emphasis (specified using qcom,preemphasis-level) must be in
48 effect. Duration could be half-bit of full-bit.
49 See dt-bindings/phy/phy-qcom-qusb2.h for applicable values.
50 This property is applicable to only QUSB2 v2 PHY (sdm845).
51 Default value is full-bit width for sdm845.
54 hsusb_phy: phy@7411000 {
55 compatible = "qcom,msm8996-qusb2-phy";
56 reg = <0x7411000 0x180>;
59 clocks = <&gcc GCC_USB_PHY_CFG_AHB2PHY_CLK>,
60 <&gcc GCC_RX1_USB2_CLKREF_CLK>,
61 clock-names = "cfg_ahb", "ref";
63 vdda-pll-supply = <&pm8994_l12>;
64 vdda-phy-dpdm-supply = <&pm8994_l24>;
66 resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>;
67 nvmem-cells = <&qusb2p_hstx_trim>;