From patchwork Mon Jun 17 12:51:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 10999155 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 09D7914BB for ; Mon, 17 Jun 2019 12:51:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EEE6728905 for ; Mon, 17 Jun 2019 12:51:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E1B1F28910; Mon, 17 Jun 2019 12:51:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81E5C2871F for ; Mon, 17 Jun 2019 12:51:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728015AbfFQMvY (ORCPT ); Mon, 17 Jun 2019 08:51:24 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:44284 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727465AbfFQMvN (ORCPT ); Mon, 17 Jun 2019 08:51:13 -0400 Received: by mail-wr1-f68.google.com with SMTP id r16so9796415wrl.11 for ; Mon, 17 Jun 2019 05:51:12 -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=2C6MxhIF9Gjdvx3J9DYd/48/Suqux1auzpg7O20+XA4=; b=MHuiL6Hd66D8KM0jn4ls2iBDOBivmXgGCkd0bRuw3BVISYThbeIBV65YPTVnC9S5pN 8kwD7l1LeRLhShtYuu/Ido0JQEJeak94CdUos+d7lXijbpc7lq70fcnle30NFz0tcJIj fAbhj9eIhnoDKlZtfNVWfkzOAx8xp0EuIZ9g38860fnnolOIibyFhNmFCQEOV3JsQtou UjFRWCn0iZbk4TdcLNFh4kMAKOur21h0NofVuZCw5wYBD3SEo5yr15DOn4ZrA5obTtoT wSTQGINMn3kmRWVRTFv5WxMKEdA0kEwajLFNzSkDL3ycCAfLXhvSJF2ZlVcb1F43lutn H4ew== 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=2C6MxhIF9Gjdvx3J9DYd/48/Suqux1auzpg7O20+XA4=; b=BBSjiEScNaT4U3CA5KjsxxgJPDOJGvMvVlS2z2n4pHb8vLhlxZFFThFExtp0LWcceT F9B0K7PHQ7nRHQl+1SQqUi4gF9sIZgy3BeGGYwwjoTGm8TotcOT00aTjZms5nu8kIz3k KsUg8EKoHwzcbdz5r+x6QGhM6keEWnOZnsjww/oG8XLew9xf10Bzj0owML+AqJ7BK0w6 utztNk1AS0ylneZer9AXYuW2D/5j2aC2VC7QGDpEOml2F4PMoXnVaveJWPvILiJ0DQDv QedL1nxaM2/bqOXaSDSZoJTo6waX430sRk/0j1Kb6PEFPNAUnXjvuHS79OaeCioEPA6p V57Q== X-Gm-Message-State: APjAAAVImT+lP6KCVo6BAKxpp3kX5xy6dkBqkuiBQkAKCI8vSETk6iZ6 EyB2betP5lL2Xm09iQ8RoAJDrA== X-Google-Smtp-Source: APXvYqwC65DYERLdER2UmlNerHOaEQY3c4hwpSMWsWud6VpPKrL6rBW7xSk8iiKL0ioPg8v7UxK/qQ== X-Received: by 2002:adf:ebc6:: with SMTP id v6mr14844325wrn.222.1560775871713; Mon, 17 Jun 2019 05:51:11 -0700 (PDT) Received: from dell.watershed.co.uk ([2.27.35.243]) by smtp.gmail.com with ESMTPSA id o11sm10477852wmh.37.2019.06.17.05.51.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 05:51:11 -0700 (PDT) From: Lee Jones To: alokc@codeaurora.org, agross@kernel.org, david.brown@linaro.org, bjorn.andersson@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org, ard.biesheuvel@linaro.org, jlhugo@gmail.com, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, felipe.balbi@linux.intel.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lee Jones Subject: [RESEND v4 3/4] usb: dwc3: qcom: Start USB in 'host mode' on the SDM845 Date: Mon, 17 Jun 2019 13:51:04 +0100 Message-Id: <20190617125105.6186-4-lee.jones@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190617125105.6186-1-lee.jones@linaro.org> References: <20190617125105.6186-1-lee.jones@linaro.org> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Reviewed-by: Bjorn Andersson --- 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 0cb63f6c92d9..2d050303d564 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");