linux-kernel - [PATCH v4 4/4] arm64: dts: ti: k3-am69-sk: Add PCIe support

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Message-ID: <20240529082259.1619695-5-s-vadapalli@ti.com>
Date: Wed, 29 May 2024 13:52:59 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <francesco@...cini.it>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <sabiya.d@...com>,
        <u-kumar1@...com>, <danishanwar@...com>, <srk@...com>,
        <s-vadapalli@...com>
Subject: [PATCH v4 4/4] arm64: dts: ti: k3-am69-sk: Add PCIe support

From: Dasnavis Sabiya <sabiya.d@...com>

The AM69-SK board has 3 instances of PCIe namely PCIe0, PCIe1 and PCIe3.
The x4 PCIe0 instance is connected to a Card Edge connector via SERDES1.
The x2 PCIe1 instance is connected to an M.2 M Key connector via SERDES0.
The x1 PCIe3 instance is connected to an M.2 E Key connector via SERDES0.

Add device-tree support for enabling all 3 PCIe instances in Root-Complex
mode of operation.

Signed-off-by: Dasnavis Sabiya <sabiya.d@...com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
This patch has been added newly in this series.

 arch/arm64/boot/dts/ti/k3-am69-sk.dts | 60 +++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
index d88651c297a2..14c359d810d7 100644
--- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
@@ -1203,3 +1203,63 @@ partition@...0000 {
 		};
 	};
 };
+
+&serdes_ln_ctrl {
+	idle-states = <J784S4_SERDES0_LANE0_PCIE1_LANE0>, <J784S4_SERDES0_LANE1_PCIE1_LANE1>,
+		      <J784S4_SERDES0_LANE2_PCIE3_LANE0>, <J784S4_SERDES0_LANE3_USB>,
+			<J784S4_SERDES1_LANE0_PCIE0_LANE0>, <J784S4_SERDES1_LANE1_PCIE0_LANE1>,
+			<J784S4_SERDES1_LANE2_PCIE0_LANE2>, <J784S4_SERDES1_LANE3_PCIE0_LANE3>;
+};
+
+&serdes_wiz0 {
+	status = "okay";
+};
+
+&serdes0 {
+	status = "okay";
+	serdes0_pcie_link: phy@0 {
+		reg = <0>;
+		cdns,num-lanes = <3>;
+		#phy-cells = <0>;
+		cdns,phy-type = <PHY_TYPE_PCIE>;
+		resets = <&serdes_wiz0 1>, <&serdes_wiz0 2>, <&serdes_wiz0 3>;
+	};
+};
+
+&serdes_wiz1 {
+	status = "okay";
+};
+
+&serdes1 {
+	status = "okay";
+	serdes1_pcie_link: phy@0 {
+		reg = <0>;
+		cdns,num-lanes = <4>;
+		#phy-cells = <0>;
+		cdns,phy-type = <PHY_TYPE_PCIE>;
+		resets = <&serdes_wiz1 1>, <&serdes_wiz1 2>, <&serdes_wiz1 3>, <&serdes_wiz1 4>;
+	};
+};
+
+&pcie0_rc {
+	status = "okay";
+	reset-gpios = <&exp1 4 GPIO_ACTIVE_HIGH>;
+	phys = <&serdes1_pcie_link>;
+	phy-names = "pcie-phy";
+};
+
+&pcie1_rc {
+	status = "okay";
+	reset-gpios = <&exp1 5 GPIO_ACTIVE_HIGH>;
+	phys = <&serdes0_pcie_link>;
+	phy-names = "pcie-phy";
+	num-lanes = <2>;
+};
+
+&pcie3_rc {
+	status = "okay";
+	reset-gpios = <&exp1 6 GPIO_ACTIVE_HIGH>;
+	phys = <&serdes0_pcie_link>;
+	phy-names = "pcie-phy";
+	num-lanes = <1>;
+};
-- 
2.40.1