linux-kernel - [PATCH 3/4] arm64: dts: imx8qxp-mek: Add PCIe support

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Message-Id: <20241002204750.597337-3-Frank.Li@nxp.com>
Date: Wed,  2 Oct 2024 16:47:47 -0400
From: Frank Li <Frank.Li@....com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	imx@...ts.linux.dev (open list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 3/4] arm64: dts: imx8qxp-mek: Add PCIe support

Add PCIe support for i.MX8QXP MEK board.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 arch/arm64/boot/dts/freescale/imx8qxp-mek.dts | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
index 936ba5ecdcac7..9f643a4ce8ae7 100644
--- a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
@@ -45,6 +45,15 @@ usb3_data_ss: endpoint {
 		};
 	};
 
+	reg_pcieb: regulator-pcie {
+		compatible = "regulator-fixed";
+		regulator-max-microvolt = <3300000>;
+		regulator-min-microvolt = <3300000>;
+		regulator-name = "mpcie_3v3";
+		gpio = <&pca9557_a 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
 	sound-wm8960 {
 		compatible = "fsl,imx-audio-wm8960";
 		model = "wm8960-audio";
@@ -246,6 +255,12 @@ &cm40_intmux {
 	status = "okay";
 };
 
+&hsio_phy {
+	fsl,hsio-cfg = "pciea-x2-pcieb";
+	fsl,refclk-pad-mode = "input";
+	status = "okay";
+};
+
 &lpuart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_lpuart0>;
@@ -272,6 +287,16 @@ &mu1_m0 {
 	status = "okay";
 };
 
+&pcieb {
+	phys = <&hsio_phy 0 PHY_TYPE_PCIE 0>;
+	phy-names = "pcie-phy";
+	pinctrl-0 = <&pinctrl_pcieb>;
+	pinctrl-names = "default";
+	reset-gpios = <&lsio_gpio4 0 GPIO_ACTIVE_LOW>;
+	vpcie-supply = <&reg_pcieb>;
+	status = "okay";
+};
+
 &scu_key {
 	status = "okay";
 };
@@ -493,6 +518,14 @@ IMX8QXP_FLEXCAN2_RX_ADMA_UART3_RX       0x06000020
 		>;
 	};
 
+	pinctrl_pcieb: pcieagrp {
+		fsl,pins = <
+			IMX8QXP_PCIE_CTRL0_PERST_B_LSIO_GPIO4_IO00		0x06000021
+			IMX8QXP_PCIE_CTRL0_CLKREQ_B_HSIO_PCIE0_CLKREQ_B 	0x06000021
+			IMX8QXP_PCIE_CTRL0_WAKE_B_LSIO_GPIO4_IO02		0x04000021
+		>;
+	};
+
 	pinctrl_typec: typecgrp {
 		fsl,pins = <
 			IMX8QXP_SPI2_SCK_LSIO_GPIO1_IO03                        0x06000021
-- 
2.34.1