From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B06B4C2BCA1 for ; Fri, 7 Jun 2019 08:29:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8610120B7C for ; Fri, 7 Jun 2019 08:29:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="onAIZ/TO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728127AbfFGI30 (ORCPT ); Fri, 7 Jun 2019 04:29:26 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:40729 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728021AbfFGI3M (ORCPT ); Fri, 7 Jun 2019 04:29:12 -0400 Received: by mail-wm1-f68.google.com with SMTP id v19so1016879wmj.5 for ; Fri, 07 Jun 2019 01:29:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=D1YI3KbYi08Gt53137zQUvYaTjAlj5pAkcVwiE+DyoM=; b=onAIZ/TOMn7vu8edA+Q0maMV3YC0CutOaiTQNG8U24Hc/kDK9jS/fHAe1a20UhN0fo 7cNBfiTEtfbcSLzpHgMkUSMC1YIVfogH4tTE/eLQukkLUqAGYI0rilKVlpKmsXpmHS+h 6IlLik8qVl5LgO9Vj0+ZcIBb3HCFhBAS05RmRB+Wb6MimlzNof589ejFsF2jCViPAMlp l6n4mF6y4W3R7NMRsous4rjXQC6Z/VnK87t4T7yzjnoxlLkj9oPQxofR4cn6zbLRpyeM OPYYEyhi3L76+sQ3G3maREXu+j/KZuaeQ79HK23oR43rcClTk7b235we0Bd9jZccRP8L PNBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=D1YI3KbYi08Gt53137zQUvYaTjAlj5pAkcVwiE+DyoM=; b=BaG2f0mOUsBHADhGRokiajziQNwf55Go1r/PSEzL4d7g6DHdbw8hMe72Nsh/TfTg4I Lg280ryjSpZy098hziCG8IEwbd1hzFRFFZwFteiL+y1CFAyRplYNYE6u76udZ+AvMv4h j/ojbh/+qHDpWJj8tMpw0fih0knBo+ZyUmp+OB4YhPXB5DHcrk28TsQJgRquVPGaVrcI +HyH38Z2Qc+b1Jn7+rYBv81x31h5kMyKFfkS8NHU+A1dlLbjVnQGavRCfnPr0XLkcTBA B0evxk/stggkiJMaiE+9BFTM7SiOoD3gEaXPu4v8nGdeW20LTA5nA6Wfho3fbyXpeYmg zPdw== X-Gm-Message-State: APjAAAWraXYjY9gxClgb1cFJwH7d6NMNWmdtGb8rJwnOEIutGoXD7+2z WqVCmtKTq+oN7PX6ybaMp5GusFn1NXA= X-Google-Smtp-Source: APXvYqx2NoYMMtqWa8ReJN5TrwKSrvBHd3ZkYJmk385TGGdhyyq1kjQl0TAzcvNbMTlyHzWbu6liKQ== X-Received: by 2002:a1c:b041:: with SMTP id z62mr2942302wme.113.1559896150318; Fri, 07 Jun 2019 01:29:10 -0700 (PDT) Received: from localhost.localdomain ([2.31.167.229]) by smtp.gmail.com with ESMTPSA id a3sm1092946wmb.35.2019.06.07.01.29.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 07 Jun 2019 01:29:09 -0700 (PDT) From: Lee Jones To: alokc@codeaurora.org, andy.gross@linaro.org, david.brown@linaro.org, wsa+renesas@sang-engineering.com, bjorn.andersson@linaro.org, linus.walleij@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, jlhugo@gmail.com, linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-gpio@vger.kernel.org, linux-usb@vger.kernel.org, Lee Jones Subject: [PATCH v2 7/8] usb: dwc3: qcom: Start USB in 'host mode' on the SDM845 Date: Fri, 7 Jun 2019 09:29:00 +0100 Message-Id: <20190607082901.6491-7-lee.jones@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190607082901.6491-1-lee.jones@linaro.org> References: <20190607082901.6491-1-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When booting with Device Tree, the current default boot configuration table option, the request to boot via 'host mode' comes from the 'dr_mode' property. A property of the same name can be used inside ACPI tables too. However it is missing from the SDM845's ACPI tables so we have to supply this information using Platform Device Properties instead. This does not change the behaviour of any currently supported devices. The property is only set on ACPI enabled platforms, thus for H/W booting DT, unless a 'dr_mode' property is present, the default is still OTG (On-The-Go) as per [0]. Any new ACPI devices added will also be able to over-ride this implementation by providing a 'dr_mode' property in their ACPI tables. In cases where 'dr_mode' is omitted from the tables AND 'host mode' should not be the default (very unlikely), then we will have to add some way of choosing between them at run time - most likely by ACPI HID. [0] Documentation/devicetree/bindings/usb/generic.txt Signed-off-by: Lee Jones --- drivers/usb/dwc3/dwc3-qcom.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 1e1f12b7991d..55ba04254e38 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -444,6 +444,11 @@ static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count) return 0; } +static const struct property_entry dwc3_qcom_acpi_properties[] = { + PROPERTY_ENTRY_STRING("dr_mode", "host"), + {} +}; + static int dwc3_qcom_acpi_register_core(struct platform_device *pdev) { struct dwc3_qcom *qcom = platform_get_drvdata(pdev); @@ -488,6 +493,13 @@ static int dwc3_qcom_acpi_register_core(struct platform_device *pdev) goto out; } + ret = platform_device_add_properties(qcom->dwc3, + dwc3_qcom_acpi_properties); + if (ret < 0) { + dev_err(&pdev->dev, "failed to add properties\n"); + goto out; + } + ret = platform_device_add(qcom->dwc3); if (ret) dev_err(&pdev->dev, "failed to add device\n"); -- 2.17.1