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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 28BD4C3DA59 for ; Mon, 15 Jul 2024 18:14:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=KtEqsKKyAId6WCwFuWmtXjapIMQ6lcIUriKWZ69bLDE=; b=rPmqhOKO90yAZ+eNvHxt59PmND 6qXZtMMpBp6KiPW9gc3dOyOAu4myZNs0l9sUIFK4gU3Xe4ww0EcZUUdvk1tDrm/XQ94gzXxP82LtH jJyV2pI5fvhse1GMxHKjlIs67f2C3NP0u251Ylq3es7vH3Rb7F2Sg8tDT7+1ueEMdW4sVYBZwKotw 9sNItwBMi94/4bW+ahL0lWymcYJSEao4VW8GvaMpwta4PMfiq5Z3NKA4lt+gqsui9XL1P+xZegwdF gk6g2DcPFefU+qLjdCO48LU5C2MgwjqBZgjRK8bWMeum2ucAb4PluqoTwWSn2OxmXFsw6sgi3kXs7 Z4tHXysg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sTQDf-00000007yf5-42ua; Mon, 15 Jul 2024 18:14:39 +0000 Received: from mx0a-0031df01.pphosted.com ([205.220.168.131]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sTQD5-00000007yTM-0axM for linux-arm-kernel@lists.infradead.org; Mon, 15 Jul 2024 18:14:04 +0000 Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46FH9bbJ001777; Mon, 15 Jul 2024 18:13:54 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=qcppdkim1; bh=KtEqsKKyAId6WCwFuWmtXjap IMQ6lcIUriKWZ69bLDE=; b=o+sBeQIC9Q9MVh08iqfelLQ2IX9jZ08inM7sRNCl n5yj/cKsFuRPX16g6aSdPy082T1OMFdVSH92uxe41NGTqyr5SFFO1u0mMWtqP0rh 6y9/ylXRHJnCHtGJDo1mNVFDZvG5X/Gnx52jjGpGFOiyjcrU4zxUb1tOD3XqUnvm 2V2AqENaW5W7s+pLGPuyoGRb2XanJ6t+A9RdirZKRj9muWqUwlE/7VoD4Zw27c1D +Ae7c4lS0MeLGmE/lq7VuB5OCFUGcU1DcMxI5WRqlBCJ2ZnPaRKsxg2qeEa8VHUR 5aJ4GsrB48wlLGB0CDtVbAPjYTnQa1xlYbeM4IHNMiVXeg== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 40bjbh4up8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Jul 2024 18:13:54 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA03.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 46FIDrKj011266 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 Jul 2024 18:13:53 GMT Received: from hu-mrana-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 15 Jul 2024 11:13:53 -0700 From: Mayank Rana To: , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , , Mayank Rana Subject: [PATCH V2 5/7] PCI: host-generic: Add power domain based handling for PCIe controller Date: Mon, 15 Jul 2024 11:13:33 -0700 Message-ID: <1721067215-5832-6-git-send-email-quic_mrana@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1721067215-5832-1-git-send-email-quic_mrana@quicinc.com> References: <1721067215-5832-1-git-send-email-quic_mrana@quicinc.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: JMtVsoSUwacfvcTCm72XoCPtsZeg-yZk X-Proofpoint-GUID: JMtVsoSUwacfvcTCm72XoCPtsZeg-yZk X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-15_12,2024-07-11_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 spamscore=0 mlxlogscore=999 mlxscore=0 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2407150142 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240715_111403_211084_2D7F6FBE X-CRM114-Status: GOOD ( 20.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add usage of power domain to control PCIe controller enumeration. This is needed to allow interaction with firmware to vote/unvote system resources, PCIe PHY and configuration of PCIe controller into ECAM mode. This feature support system suspend and resume to put PCIe into D3 cold and D0. Signed-off-by: Mayank Rana --- drivers/pci/controller/pci-host-generic.c | 42 +++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/pci-host-generic.c b/drivers/pci/controller/pci-host-generic.c index 41cb6a0..c2c027f 100644 --- a/drivers/pci/controller/pci-host-generic.c +++ b/drivers/pci/controller/pci-host-generic.c @@ -13,6 +13,7 @@ #include #include #include +#include static const struct pci_ecam_ops gen_pci_cfg_cam_bus_ops = { .bus_shift = 16, @@ -76,13 +77,50 @@ static const struct of_device_id gen_pci_of_match[] = { }; MODULE_DEVICE_TABLE(of, gen_pci_of_match); +static int gen_pcie_ecam_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + int ret = 0; + + if (!IS_ERR_OR_NULL(dev->pm_domain)) { + ret = devm_pm_runtime_enable(dev); + if (ret) + return ret; + + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) { + dev_err(dev, "fail to enable pcie controller:%d\n", ret); + return ret; + } + } + + ret = pci_host_common_probe(pdev); + if (ret) { + dev_err(dev, "pci_host_common_probe() failed:%d\n", ret); + goto err; + } + + return ret; +err: + if (!IS_ERR_OR_NULL(dev->pm_domain)) + pm_runtime_put_sync(dev); + return ret; +} + +static void gen_pcie_ecam_remove(struct platform_device *pdev) +{ + pci_host_common_remove(pdev); + if (pdev->dev.pm_domain) + pm_runtime_put_sync(&pdev->dev); +} + static struct platform_driver gen_pci_driver = { .driver = { .name = "pci-host-generic", .of_match_table = gen_pci_of_match, }, - .probe = pci_host_common_probe, - .remove_new = pci_host_common_remove, + .probe = gen_pcie_ecam_probe, + .remove_new = gen_pcie_ecam_remove, }; module_platform_driver(gen_pci_driver); -- 2.7.4