summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/phy/qcom-qmp-phy.txt
blob: adf20b2bdf71504935cea1dca96a17e03393ad98 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
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,ipq8074-qmp-pcie-phy" for PCIe phy on IPQ8074
	       "qcom,msm8996-qmp-pcie-phy" for 14nm PCIe phy on msm8996,
	       "qcom,msm8996-qmp-usb3-phy" for 14nm USB3 phy on msm8996,
	       "qcom,sdm845-qmp-usb3-phy" for USB3 QMP V3 phy on sdm845,
	       "qcom,sdm845-qmp-usb3-uni-phy" for USB3 QMP V3 UNI phy on sdm845,
	       "qcom,sdm845-qmp-ufs-phy" for UFS QMP phy on sdm845.

- reg:
  - index 0: address and length of register set for PHY's common
             serdes block.
  - index 1: address and length of the DP_COM control block (for
             "qcom,sdm845-qmp-usb3-phy" only).

- reg-names:
  - For "qcom,sdm845-qmp-usb3-phy":
    - Should be: "reg-base", "dp_com"
  - For all others:
    - The reg-names property shouldn't be defined.

 - #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,
		"com_aux" for phy common block aux clock,
		"ref_aux" for phy reference aux clock,
		For "qcom,msm8996-qmp-pcie-phy" must contain:
			"aux", "cfg_ahb", "ref".
		For "qcom,msm8996-qmp-usb3-phy" must contain:
			"aux", "cfg_ahb", "ref".
		For "qcom,qmp-v3-usb3-phy" must contain:
			"aux", "cfg_ahb", "ref", "com_aux".

 - 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".
		For "qcom,ipq8074-qmp-pcie-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 -
	- index 0: tx
	- index 1: rx
	- index 2: pcs
	- index 3: pcs_misc (optional)

 - #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.
 - clock-output-names: Name of the PHY clock that will be the parent for
		       the above pipe clock.

	For "qcom,ipq8074-qmp-pcie-phy":
		- "pcie20_phy0_pipe_clk"	Pipe Clock parent
			(or)
		  "pcie20_phy1_pipe_clk"

 - 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";
			clock-output-names = "pcie_0_pipe_clk_src";
			resets = <&gcc GCC_PCIE_0_PHY_BCR>;
			reset-names = "lane0";
		};

		pciephy_1: lane@36000 {
		...
		...
	};