From patchwork Wed Jul 23 14:48:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Griffin X-Patchwork-Id: 372984 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 1BCF71400F4 for ; Thu, 24 Jul 2014 00:50:53 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756908AbaGWOuv (ORCPT ); Wed, 23 Jul 2014 10:50:51 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:51329 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757992AbaGWOs5 (ORCPT ); Wed, 23 Jul 2014 10:48:57 -0400 Received: by mail-wi0-f179.google.com with SMTP id f8so2388333wiw.6 for ; Wed, 23 Jul 2014 07:48:56 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=orLPq+BKzrg5nzpD16huVCde+nuNrOd5KO1qAx29H8s=; b=BN6jqrH6AO4BKvty9UpdOnnV3sgu7vMGCnP/G/bdqnBOCr0wCZ3wSapfit2ydefPHS TyN+zP2MLNoKadWZo/pZmwGAZERoqAV23rfTQl81PKosUDX5XkQlosRqvfiN9BAwq/ua QayMprWn1RxIvB9gKIh3/b4BjGfuvIwfUrUavWNE0eFdK0xNQhuR1s8SKB2e/52HBv+6 T56G6ZFf7MZQ7tQ3L2oWxePWKZqoPZsMuzOg4hnal2c1RvdQzvx7VKwijuWMUt37UksZ IiQfT2UYJBueBr73y8O91lKWvhT0GN1Ki5CvOE/3iRfZwPl3I9GOQNoHiCO9usiJg2bx WrGQ== X-Gm-Message-State: ALoCoQkDGlr1RbEGIZdPVurdIEJM3a1+2CydB2Wi7UIee3A8wNThd8tLq+e185ApZneH5OmFRheu X-Received: by 10.194.89.168 with SMTP id bp8mr2458954wjb.73.1406126936282; Wed, 23 Jul 2014 07:48:56 -0700 (PDT) Received: from griffinp-ThinkPad-X1-Carbon-2nd.home (host109-148-232-149.range109-148.btcentralplus.com. [109.148.232.149]) by mx.google.com with ESMTPSA id ey16sm10270873wid.14.2014.07.23.07.48.54 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 23 Jul 2014 07:48:55 -0700 (PDT) From: Peter Griffin To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, maxime.coquelin@st.com, patrice.chotard@st.com, srinivas.kandagatla@gmail.com, devicetree@vger.kernel.org, balbi@ti.com, linux-usb@vger.kernel.org, linux-omap@vger.kernel.org, peppe.cavallaro@st.com Cc: peter.griffin@linaro.org, lee.jones@linaro.org Subject: [PATCH v3 2/3] usb: dwc3: dwc3-st: Add st-dwc3 devicetree bindings documentation Date: Wed, 23 Jul 2014 15:48:34 +0100 Message-Id: <1406126915-30601-3-git-send-email-peter.griffin@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1406126915-30601-1-git-send-email-peter.griffin@linaro.org> References: <1406126915-30601-1-git-send-email-peter.griffin@linaro.org> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@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 | 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 = ; + dr_mode = "host" + usb-phy = <&usb3_phy>; + phy-names = "usb2-phy"; + phys = <&usb2_picophy2>; + }; +};