From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754880AbaIBRJX (ORCPT ); Tue, 2 Sep 2014 13:09:23 -0400 Received: from mail-we0-f171.google.com ([74.125.82.171]:35956 "EHLO mail-we0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753855AbaIBRJR (ORCPT ); Tue, 2 Sep 2014 13:09:17 -0400 From: Peter Griffin To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, balbi@ti.com, maxime.coquelin@st.com, patrice.chotard@st.com, srinivas.kandagatla@gmail.com, devicetree@vger.kernel.org, lee.jones@linaro.org, linux-usb@vger.kernel.org, linux-omap@vger.kernel.org, peppe.cavallaro@st.com Cc: peter.griffin@linaro.org Subject: [PATCH v5 2/3] usb: dwc3: dwc3-st: Add st-dwc3 devicetree bindings documentation Date: Tue, 2 Sep 2014 18:08:48 +0100 Message-Id: <1409677729-6922-3-git-send-email-peter.griffin@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409677729-6922-1-git-send-email-peter.griffin@linaro.org> References: <1409677729-6922-1-git-send-email-peter.griffin@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch documents the device tree documentation required for the ST usb3 controller glue layer found in STiH407 devices. Signed-off-by: Giuseppe Cavallaro Signed-off-by: Peter Griffin Acked-by: Lee Jones --- Documentation/devicetree/bindings/usb/dwc3-st.txt | 68 +++++++++++++++++++++++ 1 file changed, 68 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..f9d7025 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/dwc3-st.txt @@ -0,0 +1,68 @@ +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 = ; + dr_mode = "host"; + phys-names = "usb2-phy", "usb3-phy"; + phys = <&usb2_picophy2>, <&phy_port2 MIPHY_TYPE_USB>; + }; +}; -- 1.9.1