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From: Prasad Malisetty <pmaliset@codeaurora.org>
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,
	Prasad Malisetty <pmaliset@codeaurora.org>
Subject: [PATCH v4 4/4] PCIe: qcom: Add support to control pipe clk src
Date: Fri, 16 Jul 2021 19:28:47 +0530	[thread overview]
Message-ID: <1626443927-32028-5-git-send-email-pmaliset@codeaurora.org> (raw)
In-Reply-To: <1626443927-32028-1-git-send-email-pmaliset@codeaurora.org>

This is a new requirement for sc7280 SoC.
To enable gdsc gcc_pcie_1_pipe_clk_src should be TCXO.
after PHY initialization gcc_pcie_1_pipe_clk_src needs
to switch from TCXO to gcc_pcie_1_pipe_clk.

Signed-off-by: Prasad Malisetty <pmaliset@codeaurora.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 8a7a300..9e0e4ab 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 *gcc_pcie_1_pipe_clk_src;
+	struct clk *phy_pipe_clk;
+	struct clk *ref_clk_src;
 };
 
 union qcom_pcie_resources {
@@ -1167,6 +1170,20 @@ 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);
+
+		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);
 }
@@ -1255,6 +1272,11 @@ 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;
+
+	if (of_device_is_compatible(dev->of_node, "qcom,pcie-sc7280"))
+		clk_set_parent(res->gcc_pcie_1_pipe_clk_src, res->phy_pipe_clk);
 
 	return clk_prepare_enable(res->pipe_clk);
 }
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2021-07-16 13:59 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-16 13:58 [PATCH v4 0/4] Add DT bindings and DT nodes for PCIe and PHY in SC7280 Prasad Malisetty
2021-07-16 13:58 ` [PATCH v4 1/4] dt-bindings: pci: qcom: Document PCIe bindings for SC720 Prasad Malisetty
2021-07-16 19:27   ` Stephen Boyd
2021-07-20  6:56     ` Prasad Malisetty
2021-07-16 13:58 ` [PATCH v4 2/4] arm64: dts: qcom: sc7280: Add PCIe and PHY related nodes Prasad Malisetty
2021-07-16 19:31   ` Stephen Boyd
2021-07-20  6:54     ` Prasad Malisetty
2021-08-02 19:23   ` Matthias Kaehlcke
2021-08-17  8:05     ` Prasad Malisetty
2021-07-16 13:58 ` [PATCH v4 3/4] arm64: dts: qcom: sc7280: Add PCIe nodes for IDP board Prasad Malisetty
2021-07-16 19:32   ` Stephen Boyd
2021-07-20  6:57     ` Prasad Malisetty
2021-07-16 13:58 ` Prasad Malisetty [this message]
2021-07-16 15:06   ` [PATCH v4 4/4] PCIe: qcom: Add support to control pipe clk src Bjorn Helgaas
2021-07-16 20:38     ` Bjorn Andersson
2021-07-20 11:28       ` Prasad Malisetty
2021-08-09 17:09       ` Prasad Malisetty
2021-07-16 19:37   ` Stephen Boyd
2021-07-16 20:31     ` Bjorn Andersson
2021-07-16 21:39       ` Stephen Boyd
2021-07-16 22:11         ` Bjorn Andersson
2021-07-16 14:29 ` [PATCH v4 0/4] Add DT bindings and DT nodes for PCIe and PHY in SC7280 Bjorn Helgaas

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