linux-kernel - [PATCH v7 10/10] arm64: dts: imx95: Add ref clock for i.MX95 PCIe

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Message-Id: <20241126075702.4099164-11-hongxing.zhu@nxp.com>
Date: Tue, 26 Nov 2024 15:57:02 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: l.stach@...gutronix.de,
	bhelgaas@...gle.com,
	lpieralisi@...nel.org,
	kw@...ux.com,
	manivannan.sadhasivam@...aro.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	frank.li@....com,
	s.hauer@...gutronix.de,
	festevam@...il.com
Cc: imx@...ts.linux.dev,
	kernel@...gutronix.de,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Richard Zhu <hongxing.zhu@....com>,
	Frank Li <Frank.Li@....com>
Subject: [PATCH v7 10/10] arm64: dts: imx95: Add ref clock for i.MX95 PCIe

Add ref clock for i.MX95 PCIe here, when the internal PLL is used as
PCIe reference clock.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
Reviewed-by: Frank Li <Frank.Li@....com>
---
 arch/arm64/boot/dts/freescale/imx95.dtsi | 25 ++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
index 03661e76550f..9951d2c84799 100644
--- a/arch/arm64/boot/dts/freescale/imx95.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx95.dtsi
@@ -236,6 +236,13 @@ clk_ext1: clock-ext1 {
 		clock-output-names = "clk_ext1";
 	};
 
+	clk_sys100m: clock-sys100m {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <1000000>;
+		clock-output-names = "clk_sys100m";
+	};
+
 	sai1_mclk: clock-sai-mclk1 {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
@@ -1473,6 +1480,14 @@ smmu: iommu@...d0000 {
 			};
 		};
 
+		hsio_blk_ctl: syscon@...100c0 {
+			compatible = "nxp,imx95-hsio-blk-ctl", "syscon";
+			reg = <0x0 0x4c0100c0 0x0 0x4>;
+			#clock-cells = <1>;
+			clocks = <&clk_sys100m>;
+			power-domains = <&scmi_devpd IMX95_PD_HSIO_TOP>;
+		};
+
 		pcie0: pcie@...00000 {
 			compatible = "fsl,imx95-pcie";
 			reg = <0 0x4c300000 0 0x10000>,
@@ -1500,8 +1515,9 @@ pcie0: pcie@...00000 {
 			clocks = <&scmi_clk IMX95_CLK_HSIO>,
 				 <&scmi_clk IMX95_CLK_HSIOPLL>,
 				 <&scmi_clk IMX95_CLK_HSIOPLL_VCO>,
-				 <&scmi_clk IMX95_CLK_HSIOPCIEAUX>;
-			clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux";
+				 <&scmi_clk IMX95_CLK_HSIOPCIEAUX>,
+				 <&hsio_blk_ctl 0>;
+			clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux", "ref";
 			assigned-clocks =<&scmi_clk IMX95_CLK_HSIOPLL_VCO>,
 					 <&scmi_clk IMX95_CLK_HSIOPLL>,
 					 <&scmi_clk IMX95_CLK_HSIOPCIEAUX>;
@@ -1567,8 +1583,9 @@ pcie1: pcie@...80000 {
 			clocks = <&scmi_clk IMX95_CLK_HSIO>,
 				 <&scmi_clk IMX95_CLK_HSIOPLL>,
 				 <&scmi_clk IMX95_CLK_HSIOPLL_VCO>,
-				 <&scmi_clk IMX95_CLK_HSIOPCIEAUX>;
-			clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux";
+				 <&scmi_clk IMX95_CLK_HSIOPCIEAUX>,
+				 <&hsio_blk_ctl 0>;
+			clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux", "ref";
 			assigned-clocks =<&scmi_clk IMX95_CLK_HSIOPLL_VCO>,
 					 <&scmi_clk IMX95_CLK_HSIOPLL>,
 					 <&scmi_clk IMX95_CLK_HSIOPCIEAUX>;
-- 
2.37.1