1 ST DWC3 glue logic
2
3 This file documents the parameters for the dwc3-st driver.
4 This driver controls the glue logic used to configure the dwc3 core on
5 STiH407 based platforms.
6
7 Required properties:
8 - compatible : must be "st,stih407-dwc3"
9 - reg : glue logic base address and USB syscfg ctrl register offset
10 - reg-names : should be "reg-glue" and "syscfg-reg"
11 - st,syscon : should be phandle to system configuration node which
12 encompasses the glue registers
13 - resets : list of phandle and reset specifier pairs. There should be two entries, one
14 for the powerdown and softreset lines of the usb3 IP
15 - reset-names : list of reset signal names. Names should be "powerdown" and "softreset"
16 See: Documentation/devicetree/bindings/reset/st,stih407-powerdown.yaml
17 See: Documentation/devicetree/bindings/reset/reset.txt
18
19 - #address-cells, #size-cells : should be '1' if the device has sub-nodes
20 with 'reg' property
21
22 - pinctl-names : A pinctrl state named "default" must be defined
23 See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
24
25 - pinctrl-0 : Pin control group
26 See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
27
28 - ranges : allows valid 1:1 translation between child's address space and
29 parent's address space
30
31 Sub-nodes:
32 The dwc3 core should be added as subnode to ST DWC3 glue as shown in the
33 example below. The DT binding details of dwc3 can be found in:
34 Documentation/devicetree/bindings/usb/snps,dwc3.yaml
35
36 NB: The dr_mode property described in [1] is NOT optional for this driver, as the default value
37 is "otg", which isn't supported by this SoC. Valid dr_mode values for dwc3-st are either "host"
38 or "device".
39
40 [1] Documentation/devicetree/bindings/usb/usb-drd.yaml
41
42 Example:
43
44 st_dwc3: dwc3@8f94000 {
45 compatible = "st,stih407-dwc3";
46 reg = <0x08f94000 0x1000>, <0x110 0x4>;
47 reg-names = "reg-glue", "syscfg-reg";
48 st,syscfg = <&syscfg_core>;
49 resets = <&powerdown STIH407_USB3_POWERDOWN>,
50 <&softreset STIH407_MIPHY2_SOFTRESET>;
51 reset-names = "powerdown", "softreset";
52 #address-cells = <1>;
53 #size-cells = <1>;
54 pinctrl-names = "default";
55 pinctrl-0 = <&pinctrl_usb3>;
56 ranges;
57
58 dwc3: dwc3@9900000 {
59 compatible = "snps,dwc3";
60 reg = <0x09900000 0x100000>;
61 interrupts = <GIC_SPI 155 IRQ_TYPE_NONE>;
62 dr_mode = "host";
63 phy-names = "usb2-phy", "usb3-phy";
64 phys = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>;
65 };
66 };
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