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: 4611411 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0E9129F295 for ; Wed, 23 Jul 2014 14:51:57 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3A37A20170 for ; Wed, 23 Jul 2014 14:51:56 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6036B200E5 for ; Wed, 23 Jul 2014 14:51:55 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1X9xrH-00078t-9m; Wed, 23 Jul 2014 14:49:31 +0000 Received: from mail-we0-f174.google.com ([74.125.82.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1X9xr4-0006jo-TN for linux-arm-kernel@lists.infradead.org; Wed, 23 Jul 2014 14:49:19 +0000 Received: by mail-we0-f174.google.com with SMTP id x48so1321200wes.5 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=BLeiD+JsfIfEhlGniNabbWGlfwCmGmYfgE0s/Jwxq3wYaL/iRBoRffbFOictSL3pSz TogN4rATIt3uk2NjOhv2cwkjWFOJWaE3I5yIPhRtueSfAZnIdwCS+pqoWI3rrO+K5EXr o0/an3cajBZ2TMMe9qZ0IAifL/WVsee1gk2mlyUhX74tFXb3iPk0hPWKCY8sEI3Km3Lo a1FvAqkc3tfU6TpGPf26ES9437rmyrTmgmj05ig+WhYB/foegHqAfw9e5Zrbq9U5BS8G cXCSfWt1fS3NK2/eKSW2aKfQY99tKWtw/Lu8Gz65whkdmT1nhCgm6qOwlQGEzaB4H22r NNBA== X-Gm-Message-State: ALoCoQmRxzqpSBoLt5nmQB3oep+khNRCTtMZ1esi/NLC2m5dEHGfmhGiHj9vRdKx2nm/BAWVoJHA 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 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> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140723_074919_113249_B048D2C9 X-CRM114-Status: GOOD ( 14.00 ) X-Spam-Score: -0.7 (/) Cc: peter.griffin@linaro.org, lee.jones@linaro.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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>; + }; +};