From patchwork Thu Jan 28 17:52:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 1432943 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=Xth5HkEy; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DRSmh01Xpz9sW0 for ; Fri, 29 Jan 2021 04:55:15 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231346AbhA1Ry4 (ORCPT ); Thu, 28 Jan 2021 12:54:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231149AbhA1RyI (ORCPT ); Thu, 28 Jan 2021 12:54:08 -0500 Received: from mail-lj1-x233.google.com (mail-lj1-x233.google.com [IPv6:2a00:1450:4864:20::233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 60A93C0617AB for ; Thu, 28 Jan 2021 09:52:38 -0800 (PST) Received: by mail-lj1-x233.google.com with SMTP id e18so7389903lja.12 for ; Thu, 28 Jan 2021 09:52:38 -0800 (PST) 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 :mime-version:content-transfer-encoding; bh=+h4iY3X8KWYJxdBXqwutJPnHSSsLNjVIGMbK8ENRaO4=; b=Xth5HkEyru+I/oRftl/ZDJ9BqQGqc9PFbpXVMzQIqiTTVRZ+jKPaJfu0eeutGCPqFq Ux551LITZ4RfdT8b7yhUdO//5/rBe2o/7XpMvPbBCon1yCMjsEK8pgn0yrWo+Fv1CIJ0 9O1rjM4pky3dsuyVhSzEXGJIuPFNRDJMnSVV2Zh6XFXfaGNbgmkCAe6W/mQElPh/SMzd f52zcd2PK0kuChVNe4fmk/K/xGJmGWrX5479qcGUZ3ZDBAXWZ6dl16+Dc/L/ePNygrLC +bt67kayzncAC9A3x2kRVfNKB+uOVSetpWWq5VptLZ3NBuG10+jNYmnnJ0Dh4aCn6esd FM6Q== 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:mime-version:content-transfer-encoding; bh=+h4iY3X8KWYJxdBXqwutJPnHSSsLNjVIGMbK8ENRaO4=; b=dIrAN48QVK6LFMCFg0LuglXYnURh52mFDM+xbwyxiC054YGCnRMK1X7AMevQINiyNs vJcyotX2X+DiT8tGj6SOF3zxNjzniJUzEPpgdJmbNHJYImYIqifqEhUYfgWOJkUOKB95 wDDV1EZFTfGzQAR2ble7b3Va8S+68XUAWU/9YI7T2JZLHICNcEj4hrOWbptJsdJmR16v 10aJHHqH+0aJSh/uSOZbOmcdUlW2Pm8zHpK+R9G/iNuATOViAa0eZYAloRHEKCzvOALi cTZPexjvR8AJtuyM51cRxyR7M1JBwvzpETySHJ/RtpQo/azT/OIF0ASW2Z8RGSlj1c/P iTGA== X-Gm-Message-State: AOAM530mRclg/iJDrL7Bue+cJ74lXu7jVOaLNbkOBcliYMJQi85+hRme gJ4kQaEZFvb5GBoFuO3zMqUUoA== X-Google-Smtp-Source: ABdhPJwaaiMy0PndRhrLl8JkAsSnUorqd4IdFfg4mBRAi9QArmC3uK+gQIstRLDRTFKyKTlp7frTkQ== X-Received: by 2002:a2e:9ed1:: with SMTP id h17mr240397ljk.160.1611856356937; Thu, 28 Jan 2021 09:52:36 -0800 (PST) Received: from eriador.lan ([94.25.229.83]) by smtp.gmail.com with ESMTPSA id w10sm2216119ljj.37.2021.01.28.09.52.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Jan 2021 09:52:36 -0800 (PST) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Rob Herring , Arnd Bergmann , Greg Kroah-Hartman , Stanimir Varbanov , Lorenzo Pieralisi , Bjorn Helgaas Cc: linux-arm-msm@vger.kernel.org, Manivannan Sadhasivam , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH v2 3/5] pcie-qcom: provide a way to power up qca6390 chip on RB5 platform Date: Thu, 28 Jan 2021 20:52:23 +0300 Message-Id: <20210128175225.3102958-4-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210128175225.3102958-1-dmitry.baryshkov@linaro.org> References: <20210128175225.3102958-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Some Qualcomm platforms require to power up an external device before probing the PCI bus. E.g. on RB5 platform the QCA6390 WiFi/BT chip needs to be powered up before PCIe0 bus is probed. Add a quirk to the respective PCIe root bridge to attach to the power domain if one is required, so that the QCA chip is started before scanning the PCIe bus. Signed-off-by: Dmitry Baryshkov --- drivers/pci/controller/dwc/pcie-qcom.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index ab21aa01c95d..eb73c8540d4d 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -1568,6 +1569,26 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x0302, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1000, qcom_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x1001, qcom_fixup_class); +static void qcom_fixup_power(struct pci_dev *dev) +{ + int ret; + struct pcie_port *pp = dev->bus->sysdata; + struct dw_pcie *pci; + + if (!pci_is_root_bus(dev->bus)) + return; + + ret = dev_pm_domain_attach(&dev->dev, true); + if (ret < 0 || !dev->dev.pm_domain) + return; + + pci = to_dw_pcie_from_pp(pp); + dev_info(&dev->dev, "Bus powered up, waiting for link to come up\n"); + + dw_pcie_wait_for_link(pci); +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_QCOM, 0x010b, qcom_fixup_power); + static struct platform_driver qcom_pcie_driver = { .probe = qcom_pcie_probe, .driver = {