From patchwork Tue May 24 10:13:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 12859934 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 8B7CEC433EF for ; Tue, 24 May 2022 10:14:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235112AbiEXKOV (ORCPT ); Tue, 24 May 2022 06:14:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235443AbiEXKOS (ORCPT ); Tue, 24 May 2022 06:14:18 -0400 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB50585EF5; Tue, 24 May 2022 03:14:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1653387254; x=1684923254; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=CbAmDi8/WtyYqY3ZLtgYHfmw4ty6dnnPTM/wy3XYLi4=; b=VfZSq90JtCCbpAKMwKp3q7HKzvfkk9CGhiHaSS1xKEjeP4Kt2sk0onJv e280ayO8M/zLNsb65AuDqaGXteIeET1w6kBJvQZNUoZXHmI1Tve8pEzdl XjupTt0y2IM8qGEzfLc/KFCvLCpS+6y26Hn/DqL/l6mdKjEztoj+Mv9hg 4=; Received: from ironmsg08-lv.qualcomm.com ([10.47.202.152]) by alexa-out.qualcomm.com with ESMTP; 24 May 2022 03:14:13 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg08-lv.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 May 2022 03:14:13 -0700 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Tue, 24 May 2022 03:14:12 -0700 Received: from hu-kriskura-hyd.qualcomm.com (10.80.80.8) 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 15.2.986.22; Tue, 24 May 2022 03:14:06 -0700 From: Krishna Kurapati To: Krzysztof Kozlowski , Rob Herring , Andy Gross , Bjorn Andersson , Greg Kroah-Hartman , Felipe Balbi , Stephen Boyd , Doug Anderson , "Matthias Kaehlcke" , Mathias Nyman CC: , , , , , , , , Sandeep Maheswaram , Krishna Kurapati Subject: [PATCH v17 2/5] usb: dwc3: core: Host wake up support from system suspend Date: Tue, 24 May 2022 15:43:45 +0530 Message-ID: <1653387228-28110-3-git-send-email-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1653387228-28110-1-git-send-email-quic_kriskura@quicinc.com> References: <1653387228-28110-1-git-send-email-quic_kriskura@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Sandeep Maheswaram Check wakeup-source property for dwc3 core node to set the wakeup capability. Drop the device_init_wakeup call from runtime suspend and resume. If the dwc3 is wakeup capable, don't power down the USB PHY(s). The glue drivers are expected to take care of configuring the additional wakeup settings if needed based on the dwc3 wakeup capability status. In some SOC designs, powering off the PHY is resulting in higher leakage, so this patch save power on such boards. Signed-off-by: Sandeep Maheswaram Signed-off-by: Krishna Kurapati Reviewed-by: Pavankumar Kondeti Reviewed-by: Matthias Kaehlcke --- drivers/usb/dwc3/core.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 5734219..4a7c82e 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -1782,6 +1782,7 @@ static int dwc3_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dwc); dwc3_cache_hwparams(dwc); + device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source")); spin_lock_init(&dwc->lock); mutex_init(&dwc->mutex); @@ -1943,11 +1944,6 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) dwc3_core_exit(dwc); break; case DWC3_GCTL_PRTCAP_HOST: - if (!PMSG_IS_AUTO(msg)) { - dwc3_core_exit(dwc); - break; - } - /* Let controller to suspend HSPHY before PHY driver suspends */ if (dwc->dis_u2_susphy_quirk || dwc->dis_enblslpm_quirk) { @@ -1962,6 +1958,11 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) phy_pm_runtime_put_sync(dwc->usb2_generic_phy); phy_pm_runtime_put_sync(dwc->usb3_generic_phy); + + if (!PMSG_IS_AUTO(msg)) { + if (!device_can_wakeup(dwc->dev)) + dwc3_core_exit(dwc); + } break; case DWC3_GCTL_PRTCAP_OTG: /* do nothing during runtime_suspend */ @@ -2005,11 +2006,12 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) break; case DWC3_GCTL_PRTCAP_HOST: if (!PMSG_IS_AUTO(msg)) { - ret = dwc3_core_init_for_resume(dwc); - if (ret) - return ret; - dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); - break; + if (!device_can_wakeup(dwc->dev)) { + ret = dwc3_core_init_for_resume(dwc); + if (ret) + return ret; + dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); + } } /* Restore GUSB2PHYCFG bits that were modified in suspend */ reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); @@ -2081,8 +2083,6 @@ static int dwc3_runtime_suspend(struct device *dev) if (ret) return ret; - device_init_wakeup(dev, true); - return 0; } @@ -2091,8 +2091,6 @@ static int dwc3_runtime_resume(struct device *dev) struct dwc3 *dwc = dev_get_drvdata(dev); int ret; - device_init_wakeup(dev, false); - ret = dwc3_resume_common(dwc, PMSG_AUTO_RESUME); if (ret) return ret;