From patchwork Fri Sep 9 08:44:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna chaitanya chundru X-Patchwork-Id: 12971231 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23ECDECAAD5 for ; Fri, 9 Sep 2022 08:45:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230420AbiIIIpW (ORCPT ); Fri, 9 Sep 2022 04:45:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40740 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231566AbiIIIpV (ORCPT ); Fri, 9 Sep 2022 04:45:21 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 13839B40F6; Fri, 9 Sep 2022 01:45:18 -0700 (PDT) Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 2898ZYsg028862; Fri, 9 Sep 2022 08:45:09 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=h5AqmaynuKLrTLKn7227K3Xg6788QCt7Btwh+N/PpcM=; b=Nt5JCnvYndxJby43+gdspaACzJOBNDItr3RWz9PQORF86sWqFmUTgDliJmR8sFdgTvXM 2BLXAziIvVKCj582aAg7ZgsZNDNjlz4mlogtBaHO4X0NhCF0rAv5SX6Vhy2oENWUVWCl 7g79yvjDlkjlWcivIVox3+iCa2AwN6ZEQmH7omZzG6JgcgbIMIBnIrFtvtbdMvxUziWG PibTmYW9MpKKz5GGpAoE0E1HxCBqOoNwctlag6Xe2T5fubUcdGnFT3tSESbzoX6UiLen zkSN5IeE80reFm8bZ92XvZcgRfdzSOYXoudfFDcq1hyMqnm5Z1NSjeR56xIlL24NHJdq aQ== Received: from apblrppmta02.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3jfupq9e90-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 09 Sep 2022 08:45:08 +0000 Received: from pps.filterd (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 2898j5I3014248; Fri, 9 Sep 2022 08:45:05 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 3jc00m8vq7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 09 Sep 2022 08:45:05 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 2898j42Q014222; Fri, 9 Sep 2022 08:45:04 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.37]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 2898j4LL014214; Fri, 09 Sep 2022 08:45:04 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 0302544AC; Fri, 9 Sep 2022 14:15:04 +0530 (+0530) From: Krishna chaitanya chundru To: helgaas@kernel.org Cc: linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, mka@chromium.org, quic_vbadigan@quicinc.com, quic_hemantk@quicinc.com, quic_nitegupt@quicinc.com, quic_skananth@quicinc.com, quic_ramkri@quicinc.com, manivannan.sadhasivam@linaro.org, swboyd@chromium.org, dmitry.baryshkov@linaro.org, Krishna chaitanya chundru , Kishon Vijay Abraham I , Vinod Koul , linux-phy@lists.infradead.org (open list:GENERIC PHY FRAMEWORK) Subject: [PATCH v6 3/5] phy: core: Add support for phy power down & power up Date: Fri, 9 Sep 2022 14:14:42 +0530 Message-Id: <1662713084-8106-4-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1662713084-8106-1-git-send-email-quic_krichai@quicinc.com> References: <1662713084-8106-1-git-send-email-quic_krichai@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: __Wr50mEm9u1Riga9jMsOS-WY3lYLWLn X-Proofpoint-ORIG-GUID: __Wr50mEm9u1Riga9jMsOS-WY3lYLWLn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-09_04,2022-09-09_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 suspectscore=0 bulkscore=0 malwarescore=0 mlxlogscore=841 lowpriorityscore=0 spamscore=0 clxscore=1011 priorityscore=1501 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2209090029 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Introducing phy power down/up callbacks for allowing to park the link-state in L1ss without holding any PCIe resources during system suspend. Signed-off-by: Krishna chaitanya chundru --- drivers/phy/phy-core.c | 30 ++++++++++++++++++++++++++++++ include/linux/phy/phy.h | 20 ++++++++++++++++++++ 2 files changed, 50 insertions(+) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index d93ddf1..1b0b757 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -441,6 +441,36 @@ int phy_set_speed(struct phy *phy, int speed) } EXPORT_SYMBOL_GPL(phy_set_speed); +int phy_power_down(struct phy *phy) +{ + int ret; + + if (!phy || !phy->ops->power_down) + return 0; + + mutex_lock(&phy->mutex); + ret = phy->ops->power_down(phy); + mutex_unlock(&phy->mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(phy_power_down); + +int phy_power_up(struct phy *phy) +{ + int ret; + + if (!phy || !phy->ops->power_up) + return 0; + + mutex_lock(&phy->mutex); + ret = phy->ops->power_up(phy); + mutex_unlock(&phy->mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(phy_power_up); + int phy_reset(struct phy *phy) { int ret; diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index b141375..3a45f4d 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -76,6 +76,8 @@ union phy_configure_opts { * @set_mode: set the mode of the phy * @set_media: set the media type of the phy (optional) * @set_speed: set the speed of the phy (optional) + * @power_down: parking the phy in power down state + * @power_up: pulling back the phy from power down * @reset: resetting the phy * @calibrate: calibrate the phy * @release: ops to be performed while the consumer relinquishes the PHY @@ -89,6 +91,8 @@ struct phy_ops { int (*set_mode)(struct phy *phy, enum phy_mode mode, int submode); int (*set_media)(struct phy *phy, enum phy_media media); int (*set_speed)(struct phy *phy, int speed); + int (*power_down)(struct phy *phy); + int (*power_up)(struct phy *phy); /** * @configure: @@ -226,6 +230,8 @@ int phy_init(struct phy *phy); int phy_exit(struct phy *phy); int phy_power_on(struct phy *phy); int phy_power_off(struct phy *phy); +int phy_power_down(struct phy *phy); +int phy_power_up(struct phy *phy); int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode); #define phy_set_mode(phy, mode) \ phy_set_mode_ext(phy, mode, 0) @@ -349,6 +355,20 @@ static inline int phy_power_off(struct phy *phy) return -ENOSYS; } +static inline int phy_power_down(struct phy *phy) +{ + if (!phy) + return 0; + return -ENOSYS; +} + +static inline int phy_power_up(struct phy *phy) +{ + if (!phy) + return 0; + return -ENOSYS; +} + static inline int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode) {