68 lines
2.3 KiB
Plaintext
68 lines
2.3 KiB
Plaintext
ST DWC3 glue logic
|
|
|
|
This file documents the parameters for the dwc3-st driver.
|
|
This driver controls the glue logic used to configure the dwc3 core on
|
|
STiH407 based platforms.
|
|
|
|
Required properties:
|
|
- compatible : must be "st,stih407-dwc3"
|
|
- reg : glue logic base address and USB syscfg ctrl register offset
|
|
- reg-names : should be "reg-glue" and "syscfg-reg"
|
|
- st,syscon : should be phandle to system configuration node which
|
|
encompasses the glue registers
|
|
- resets : list of phandle and reset specifier pairs. There should be two entries, one
|
|
for the powerdown and softreset lines of the usb3 IP
|
|
- reset-names : list of reset signal names. Names should be "powerdown" and "softreset"
|
|
See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
|
|
See: Documentation/devicetree/bindings/reset/reset.txt
|
|
|
|
- #address-cells, #size-cells : should be '1' if the device has sub-nodes
|
|
with 'reg' property
|
|
|
|
- pinctl-names : A pinctrl state named "default" must be defined
|
|
See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
|
|
|
|
- pinctrl-0 : Pin control group
|
|
See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
|
|
|
|
- ranges : allows valid 1:1 translation between child's address space and
|
|
parent's address space
|
|
|
|
Sub-nodes:
|
|
The dwc3 core should be added as subnode to ST DWC3 glue as shown in the
|
|
example below. The DT binding details of dwc3 can be found in:
|
|
Documentation/devicetree/bindings/usb/dwc3.txt
|
|
|
|
NB: The dr_mode property described in [1] is NOT optional for this driver, as the default value
|
|
is "otg", which isn't supported by this SoC. Valid dr_mode values for dwc3-st are either "host"
|
|
or "device".
|
|
|
|
[1] Documentation/devicetree/bindings/usb/generic.txt
|
|
|
|
Example:
|
|
|
|
st_dwc3: dwc3@8f94000 {
|
|
status = "disabled";
|
|
compatible = "st,stih407-dwc3";
|
|
reg = <0x08f94000 0x1000>, <0x110 0x4>;
|
|
reg-names = "reg-glue", "syscfg-reg";
|
|
st,syscfg = <&syscfg_core>;
|
|
resets = <&powerdown STIH407_USB3_POWERDOWN>,
|
|
<&softreset STIH407_MIPHY2_SOFTRESET>;
|
|
reset-names = "powerdown", "softreset";
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&pinctrl_usb3>;
|
|
ranges;
|
|
|
|
dwc3: dwc3@9900000 {
|
|
compatible = "snps,dwc3";
|
|
reg = <0x09900000 0x100000>;
|
|
interrupts = <GIC_SPI 155 IRQ_TYPE_NONE>;
|
|
dr_mode = "host";
|
|
phy-names = "usb2-phy", "usb3-phy";
|
|
phys = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>;
|
|
};
|
|
};
|