From 40d1a31e6329da8feecc555f2bdfb8da463bdd40 Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Tue, 5 Sep 2017 11:04:24 +0200 Subject: usb: dwc3: Add dwc3 glue driver support for STi This patch adds the ST glue logic to manage the DWC3 HC on STiH407 SoC family. It configures the internal glue logic and syscfg registers. Part of this code been extracted from kernel.org driver (drivers/usb/dwc3/dwc3-st.c) Signed-off-by: Patrice Chotard Reviewed-by: Simon Glass --- doc/device-tree-bindings/usb/dwc3-st.txt | 60 ++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 doc/device-tree-bindings/usb/dwc3-st.txt (limited to 'doc/device-tree-bindings/usb') diff --git a/doc/device-tree-bindings/usb/dwc3-st.txt b/doc/device-tree-bindings/usb/dwc3-st.txt new file mode 100644 index 0000000000..a26a1397ed --- /dev/null +++ b/doc/device-tree-bindings/usb/dwc3-st.txt @@ -0,0 +1,60 @@ +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" + + - #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 + + - pinctrl-0 : Pin control group + + - 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. + +NB: The dr_mode property 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". + +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 = ; + dr_mode = "host"; + phy-names = "usb2-phy", "usb3-phy"; + phys = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>; + }; +}; -- cgit