From patchwork Mon Oct 4 19:41:28 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prasad Malisetty X-Patchwork-Id: 12534701 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5761BC4332F for ; Mon, 4 Oct 2021 19:42:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4144E6137C for ; Mon, 4 Oct 2021 19:42:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238998AbhJDToJ (ORCPT ); Mon, 4 Oct 2021 15:44:09 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:22348 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239110AbhJDToA (ORCPT ); Mon, 4 Oct 2021 15:44:00 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1633376530; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=d5xC/Y7qVaeIithoWkfnK7rPsYX3oYEtL52pGdth/kQ=; b=XiH/gUfMZKyDPRd95d5IEDvsy2o0nJlKx5lxNB3iIT4nei+CH5hO7XvqxEg9wXxAr0ZyQaoZ 3kMpduTxN32g7huhVnV8FCWTdcVVdkZ3kaXyg/9x7FkrZKG7LpS3EnLm46FRGan20vYgIs8U hICNjHSj4xSSfxJASg7WKCdGrsc= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-west-2.postgun.com with SMTP id 615b5912605ecf100b4961bc (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 04 Oct 2021 19:42:10 GMT Sender: pmaliset=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 73063C4361C; Mon, 4 Oct 2021 19:42:10 +0000 (UTC) Received: from pmaliset-linux.qualcomm.com (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: pmaliset) by smtp.codeaurora.org (Postfix) with ESMTPSA id 2FA2AC43618; Mon, 4 Oct 2021 19:42:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 2FA2AC43618 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org 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, linux-pci@vger.kernel.org, Prasad Malisetty Subject: [PATCH v10 5/5] PCI: qcom: Switch pcie_1_pipe_clk_src after PHY init in SC7280 Date: Tue, 5 Oct 2021 01:11:28 +0530 Message-Id: <1633376488-545-6-git-send-email-pmaliset@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1633376488-545-1-git-send-email-pmaliset@codeaurora.org> References: <1633376488-545-1-git-send-email-pmaliset@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On the SC7280, the clock source for gcc_pcie_1_pipe_clk_src must be the TCXO while gdsc is enabled. After PHY init successful clock source should switch to pipe clock for gcc_pcie_1_pipe_clk_src. Signed-off-by: Prasad Malisetty Reviewed-by: Stephen Boyd --- drivers/pci/controller/dwc/pcie-qcom.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 152451b..7896a86 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -166,6 +166,9 @@ struct qcom_pcie_resources_2_7_0 { struct regulator_bulk_data supplies[2]; struct reset_control *pci_reset; struct clk *pipe_clk; + struct clk *pipe_clk_src; + struct clk *phy_pipe_clk; + struct clk *ref_clk_src; }; union qcom_pcie_resources { @@ -1173,6 +1176,20 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie) if (ret < 0) return ret; + if (pcie->pipe_clk_need_muxing) { + res->pipe_clk_src = devm_clk_get(dev, "pipe_mux"); + if (IS_ERR(res->pipe_clk_src)) + return PTR_ERR(res->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); + + res->ref_clk_src = devm_clk_get(dev, "ref"); + if (IS_ERR(res->ref_clk_src)) + return PTR_ERR(res->ref_clk_src); + } + res->pipe_clk = devm_clk_get(dev, "pipe"); return PTR_ERR_OR_ZERO(res->pipe_clk); } @@ -1191,6 +1208,10 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) return ret; } + /* Set TCXO as clock source for pcie_pipe_clk_src */ + if (pcie->pipe_clk_need_muxing) + clk_set_parent(res->pipe_clk_src, res->ref_clk_src); + ret = clk_bulk_prepare_enable(res->num_clks, res->clks); if (ret < 0) goto err_disable_regulators; @@ -1262,6 +1283,10 @@ 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; + /* Set pipe clock as clock source for pcie_pipe_clk_src */ + if (pcie->pipe_clk_need_muxing) + clk_set_parent(res->pipe_clk_src, res->phy_pipe_clk); + return clk_prepare_enable(res->pipe_clk); }