From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: ACJfBou+egIscHyHnAXRCdigA1WVNWP9jgdXb7pCQJ7uIZ0iacrXr77RPt8WNlmOExLExcVVaeLs ARC-Seal: i=1; a=rsa-sha256; t=1516362260; cv=none; d=google.com; s=arc-20160816; b=tt2mwXhoyRFLpsDROh5533x7VxOHKixE8NdPgHWPCqjEKwdb4PUOQtg+Q/6HmGLjUY p/KD+1mF/cevE9xzf+XPVm6DBHQBaggksuSt78S9o+NqTpC3LgmiDp3SkFRNqY1yVJQk F+eNZGmKcycfLJ6wOT5cAKHJffuXMSGeMKfKqJAuTgGpx+xoMZzWDxL7wm4qtj2WWeYG hhG72vEvhhxGddRh0RdOfc+pPauknYQS4fL3HdxS+NAD6AT3yjEq6V1DPiVqlDeHLokj 77ClJFtSmizaj0aTj1WsyfETrWZbL4TiTwwiHKUrJ7H1lPRmcIRc4HJcTDJXDCV8xPp3 QGOg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dmarc-filter:dkim-signature:dkim-signature :arc-authentication-results; bh=kZNJ0uHRyCuc49t5LFYuom41MqMGZwnRUMyTyeil++o=; b=VNsSMwAp9LVByXbFcbDC+c3yCGhCmJIDz+T9LhoVYgrtMZdVVn40T5y0dQmjCDqAgP m9PEzOn8ygRqFNaGdynonrHvoMVaIX5NZOe6f4xicpWQbvcEXHL/Hl7qzqtwHeU/Znu/ 4+ZdcbB++jNw1qAmcTNJzaa6i2En9X/WjvLmFZG6SsUYEG1uCjzVQ6s8I89zFSbpczqi T+LGbcovF7UG2+CeWEgBVXffbid4HiXSZWyucYG9YEYwmrMIOBgnoCEMNniUMQoEv8Sy sMTf3WYMo/Dt9H2fA2/+Gvz8slF8i9rctjpg+1Dbgc0HhE5V4MWrvsSDJXaHlwh4ESP3 MkyQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=lyt6dKRB; dkim=pass header.i=@codeaurora.org header.s=default header.b=lyt6dKRB; spf=pass (google.com: domain of vivek.gautam@codeaurora.org designates 198.145.29.96 as permitted sender) smtp.mailfrom=vivek.gautam@codeaurora.org Authentication-Results: mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=lyt6dKRB; dkim=pass header.i=@codeaurora.org header.s=default header.b=lyt6dKRB; spf=pass (google.com: domain of vivek.gautam@codeaurora.org designates 198.145.29.96 as permitted sender) smtp.mailfrom=vivek.gautam@codeaurora.org DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DCC6760452 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=vivek.gautam@codeaurora.org From: Vivek Gautam To: alex.williamson@redhat.com, robh+dt@kernel.org, mark.rutland@arm.com, rjw@rjwysocki.net, robin.murphy@arm.com, will.deacon@arm.com, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, sboyd@codeaurora.org Cc: gregkh@linuxfoundation.org, sricharan@codeaurora.org, m.szyprowski@samsung.com, architt@codeaurora.org, linux-arm-msm@vger.kernel.org, vivek.gautam@codeaurora.org Subject: [PATCH v6 4/6] iommu/arm-smmu: Add the device_link between masters and smmu Date: Fri, 19 Jan 2018 17:13:41 +0530 Message-Id: <1516362223-22946-5-git-send-email-vivek.gautam@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1516362223-22946-1-git-send-email-vivek.gautam@codeaurora.org> References: <1516362223-22946-1-git-send-email-vivek.gautam@codeaurora.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590021073891800456?= X-GMAIL-MSGID: =?utf-8?q?1590021073891800456?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Sricharan R Finally add the device link between the master device and smmu, so that the smmu gets runtime enabled/disabled only when the master needs it. This is done from add_device callback which gets called once when the master is added to the smmu. Signed-off-by: Sricharan R --- drivers/iommu/arm-smmu.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 95478bfb182c..33bbcfedb896 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1367,6 +1367,7 @@ static int arm_smmu_add_device(struct device *dev) struct arm_smmu_device *smmu; struct arm_smmu_master_cfg *cfg; struct iommu_fwspec *fwspec = dev->iommu_fwspec; + struct device_link *link; int i, ret; if (using_legacy_binding) { @@ -1428,6 +1429,16 @@ static int arm_smmu_add_device(struct device *dev) pm_runtime_put_sync(smmu->dev); + /* + * Establish the link between smmu and master, so that the + * smmu gets runtime enabled/disabled as per the master's + * needs. + */ + link = device_link_add(dev, smmu->dev, DL_FLAG_PM_RUNTIME); + if (!link) + dev_warn(smmu->dev, "Unable to create device link between %s and %s\n", + dev_name(smmu->dev), dev_name(dev)); + return 0; out_cfg_free: -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation