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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFB90C4320A for ; Tue, 17 Aug 2021 17:27:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9B9661038 for ; Tue, 17 Aug 2021 17:27:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232228AbhHQR1j (ORCPT ); Tue, 17 Aug 2021 13:27:39 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:59975 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229969AbhHQR1i (ORCPT ); Tue, 17 Aug 2021 13:27:38 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1629221225; h=Message-ID: References: In-Reply-To: Subject: Cc: To: From: Date: Content-Transfer-Encoding: Content-Type: MIME-Version: Sender; bh=EfWYM7e4IPw4UxvqdMIlRmzXZnOqCrtsKfmXiL94nUE=; b=Hsh+QJttUSKSbJoAcAuS0/XgrpZVlT/+6fZWLA70ZV8BmlyiaWa5MyNQqOieQnv2jVdHjrXk owExty0tGA1qES0aAjISEYReVmNs3evSZw2uq22JXqctP1lkvH8V7bpX5LPFZDuBNtp3e2+A 6VrlN5Y1R3wA8MlqdLQ/mkvd37A= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyIxZTE2YSIsICJsaW51eC11c2JAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-west-2.postgun.com with SMTP id 611bf159105c6568db5ad79a (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 17 Aug 2021 17:26:49 GMT Sender: pmaliset=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id F2DD9C4360D; Tue, 17 Aug 2021 17:26:48 +0000 (UTC) Received: from mail.codeaurora.org (localhost.localdomain [127.0.0.1]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: pmaliset) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9C922C4338F; Tue, 17 Aug 2021 17:26:47 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Tue, 17 Aug 2021 22:56:47 +0530 From: Prasad Malisetty To: agross@kernel.org, bjorn.andersson@linaro.org, bhelgaas@google.com, robh+dt@kernel.org, swboyd@chromium.org, lorenzo.pieralisi@arm.com, svarbanov@mm-sol.com Cc: devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, dianders@chromium.org, mka@chromium.org, vbadigan@codeaurora.org, sallenki@codeaurora.org, manivannan.sadhasivam@linaro.org Subject: Re: [PATCH v5 4/4] PCI: qcom: Switch pcie_1_pipe_clk_src after PHY init in SC7280 In-Reply-To: <1628568516-24155-5-git-send-email-pmaliset@codeaurora.org> References: <1628568516-24155-1-git-send-email-pmaliset@codeaurora.org> <1628568516-24155-5-git-send-email-pmaliset@codeaurora.org> Message-ID: <349b1178f071407dfad8ba3050482772@codeaurora.org> X-Sender: pmaliset@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On 2021-08-10 09:38, Prasad Malisetty wrote: > On the SC7280, By default the clock source for pcie_1_pipe is > TCXO for gdsc enable. But after the PHY is initialized, the clock > source must be switched to gcc_pcie_1_pipe_clk from TCXO. > > Signed-off-by: Prasad Malisetty > --- > drivers/pci/controller/dwc/pcie-qcom.c | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c > b/drivers/pci/controller/dwc/pcie-qcom.c > index 8a7a300..39e3b21 100644 > --- a/drivers/pci/controller/dwc/pcie-qcom.c > +++ b/drivers/pci/controller/dwc/pcie-qcom.c > @@ -166,6 +166,8 @@ struct qcom_pcie_resources_2_7_0 { > struct regulator_bulk_data supplies[2]; > struct reset_control *pci_reset; > struct clk *pipe_clk; > + struct clk *gcc_pcie_1_pipe_clk_src; > + struct clk *phy_pipe_clk; > }; > > union qcom_pcie_resources { > @@ -1167,6 +1169,16 @@ static int qcom_pcie_get_resources_2_7_0(struct > qcom_pcie *pcie) > if (ret < 0) > return ret; > > + if (of_device_is_compatible(dev->of_node, "qcom,pcie-sc7280")) { > + res->gcc_pcie_1_pipe_clk_src = devm_clk_get(dev, "pipe_mux"); > + if (IS_ERR(res->gcc_pcie_1_pipe_clk_src)) > + return PTR_ERR(res->gcc_pcie_1_pipe_clk_src); > + > + res->phy_pipe_clk = devm_clk_get(dev, "phy_pipe"); > + if (IS_ERR(res->phy_pipe_clk)) > + return PTR_ERR(res->phy_pipe_clk); > + } > + Hi All, Greetings! I would like to check is there any other better approach instead of compatible method here as well or is it fine to use compatible method. Thanks -Prasad > res->pipe_clk = devm_clk_get(dev, "pipe"); > return PTR_ERR_OR_ZERO(res->pipe_clk); > } > @@ -1255,6 +1267,12 @@ static void qcom_pcie_deinit_2_7_0(struct > qcom_pcie *pcie) > static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie) > { > struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; > + struct dw_pcie *pci = pcie->pci; > + struct device *dev = pci->dev; > + struct device_node *node = dev->of_node; > + > + if (of_property_read_bool(node, "pipe-clk-source-switch")) > + clk_set_parent(res->gcc_pcie_1_pipe_clk_src, res->phy_pipe_clk); > > return clk_prepare_enable(res->pipe_clk); > }