From patchwork Fri May 13 11:00:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 12848665 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 C028DC433F5 for ; Fri, 13 May 2022 11:01:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1379660AbiEMLBG (ORCPT ); Fri, 13 May 2022 07:01:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379677AbiEMLBF (ORCPT ); Fri, 13 May 2022 07:01:05 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0B2A29C96 for ; Fri, 13 May 2022 04:01:02 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id 202so7162548pgc.9 for ; Fri, 13 May 2022 04:01:02 -0700 (PDT) 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=ZsD7LJRkuECyYX1jGlfTiXHU1Ijh0jPTLQ2k9fUhrL4=; b=QiA79YYEX5J9Cz/ubTy3uRnX00TKZfSieKIylSPlqoMh6cybvG0v6NWiRbpuIbSfd4 Sg6gFMhz4XRhjovPrMvP4JHa9cpy1RtHVD3W8ZH5nonlK8GBPfG8TZM1Oigbjd8ktjPu I5ajvo1NSSx0d6NQj58DvBg+rOuoKgiDFSFGVMJLmenRCGPLdU/EjXWFZJlTcNUvWUK/ 4nvf5UFYfVAZPPDC1sApcVOtsIfEl16Wn32QPMG9AxzU3sBwVPoi6wTjYWscLKHSqWCF GJjkosFZBfUJYOhl5VXrovgcrSniLe7jdBcmGv4ChD7xvrbSJSnxKcsgLoV67XeoRTD/ 4gTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZsD7LJRkuECyYX1jGlfTiXHU1Ijh0jPTLQ2k9fUhrL4=; b=UJQiYX308B/LzilHcv//Gkz8XvCIaZgmtipOINe5fOgqdS0suGtw/Fk2TmR3I69i/G T87yyiw9Grkzy2tmgciY2wX6KEmGzIp4qm8h1x0OX3WOmJSJKCIKrB2JlkVz3LN/r2YL 8Pygik6oeiT/Z6KVUJdGuxcObF51pxbq5IewoJkS7SdEyqCVGTUigrReFEnjR47Ggkla 0dhYsdK/5RnkLa/EOn5+ZdwAOlqTf46utV/55eL2AEyreXZhycob9bLBf2uVqwUpMlBk TynxRuofbNWiQjvIN6ee6Tr8XADsSnoupYthI8ApL7YxTkGK4hWogGXSV9BfyenR/0kU GRHw== X-Gm-Message-State: AOAM531aBZhH+l+ainWwTmSeoi0WxOpgsXLfBtcJSpK63LZeIj1g+L1x 9dxucsHEcyqCVMYbodOQppAQ X-Google-Smtp-Source: ABdhPJy6supPwd4jHaESPrjZJsyad5J2wl3TDO2EQ8PzZO62JGRs3jBDxNtnqMckk0JHMD7+cNctsA== X-Received: by 2002:a63:8143:0:b0:3da:eb5e:2833 with SMTP id t64-20020a638143000000b003daeb5e2833mr3514458pgd.426.1652439661640; Fri, 13 May 2022 04:01:01 -0700 (PDT) Received: from localhost.localdomain ([117.202.184.202]) by smtp.gmail.com with ESMTPSA id u36-20020a631424000000b003db0f2d135esm1322120pgl.49.2022.05.13.04.00.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 May 2022 04:01:01 -0700 (PDT) From: Manivannan Sadhasivam To: bhelgaas@google.com, lorenzo.pieralisi@arm.com, kbusch@kernel.org, hch@lst.de Cc: linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, svarbanov@mm-sol.com, bjorn.andersson@linaro.org, axboe@fb.com, quic_vbadigan@quicinc.com, quic_krichai@quicinc.com, quic_nitirawa@quicinc.com, vidyas@nvidia.com, sagi@grimberg.me, Manivannan Sadhasivam Subject: [PATCH 2/3] PCI: dwc: qcom: Set suspend_poweroff flag for SC7280 Date: Fri, 13 May 2022 16:30:26 +0530 Message-Id: <20220513110027.31015-3-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220513110027.31015-1-manivannan.sadhasivam@linaro.org> References: <20220513110027.31015-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org For aggressive power saving on SC7280 SoCs, the power for the PCI devices will be taken off during system suspend. Hence, notify the same to the PCI device drivers using "suspend_poweroff" flag so that the drivers can prepare the PCI devices to handle the poweroff and recover them during resume. Signed-off-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 6ab90891801d..4b0ad2827f8f 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -199,6 +199,7 @@ struct qcom_pcie_cfg { unsigned int has_ddrss_sf_tbu_clk:1; unsigned int has_aggre0_clk:1; unsigned int has_aggre1_clk:1; + unsigned int suspend_poweroff:1; }; struct qcom_pcie { @@ -1220,6 +1221,10 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) if (pcie->cfg->pipe_clk_need_muxing) clk_set_parent(res->pipe_clk_src, res->ref_clk_src); + /* Indicate PCI device drivers that the power will be taken off during system suspend */ + if (pcie->cfg->suspend_poweroff) + pci->pp.bridge->suspend_poweroff = true; + ret = clk_bulk_prepare_enable(res->num_clks, res->clks); if (ret < 0) goto err_disable_regulators; @@ -1548,6 +1553,7 @@ static const struct qcom_pcie_cfg sc7280_cfg = { .ops = &ops_1_9_0, .has_tbu_clk = true, .pipe_clk_need_muxing = true, + .suspend_poweroff = true, }; static const struct dw_pcie_ops dw_pcie_ops = {