On Wed, Jul 30, 2014 at 04:28:10PM +0100, Peter Griffin wrote: > This patch documents the device tree documentation required for > the ST usb3 controller glue layer found in STiH407 devices. > > Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx> > Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx> > Acked-by: Lee Jones <lee.jones@xxxxxxxxxx> > --- > Documentation/devicetree/bindings/usb/dwc3-st.txt | 69 +++++++++++++++++++++++ > 1 file changed, 69 insertions(+) > create mode 100644 Documentation/devicetree/bindings/usb/dwc3-st.txt > > diff --git a/Documentation/devicetree/bindings/usb/dwc3-st.txt b/Documentation/devicetree/bindings/usb/dwc3-st.txt > new file mode 100644 > index 0000000..de3fea3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/usb/dwc3-st.txt > @@ -0,0 +1,69 @@ > +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" > + usb-phy = <&usb3_phy>; > + phy-names = "usb2-phy"; > + phys = <&usb2_picophy2>; why are you using different binding for usb2 and usb3 phys ? Why can't you just: phys-names = "usb2-phy", "usb3-phy"; phys = <&usb2_picophy2>, <&usb3_phy>; ?? -- balbi
Attachment:
signature.asc
Description: Digital signature