linux-kernel - [PATCH v4 7/7] arm64: dts: ti: k3-j722s: Enable PCIe and USB support on J722S-EVM

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Date: Sat, 1 Jun 2024 17:45:54 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <nm@...com>, <vigneshr@...com>, <afd@...com>, <kristo@...nel.org>,
        <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <rogerq@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <u-kumar1@...com>,
        <danishanwar@...com>, <srk@...com>, <s-vadapalli@...com>
Subject: [PATCH v4 7/7] arm64: dts: ti: k3-j722s: Enable PCIe and USB support on J722S-EVM

Enable PCIe0 instance of PCIe in Root Complex mode of operation with Lane 0
of the SERDES1 instance of SERDES. Also enable USB0 instance of USB to
interface with the Type-C port via the USB hub, by configuring the pin P05
of the GPIO expander on the EVM. Enable USB1 instance of USB in SuperSpeed
mode of operation with Lane 0 of the SERDES0 instance of SERDES.

Co-developed-by: Ravi Gunasekaran <r-gunasekaran@...com>
Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
v3:
https://lore.kernel.org/r/20240524090514.152727-4-s-vadapalli@ti.com/
and
https://lore.kernel.org/r/20240524090514.152727-8-s-vadapalli@ti.com/
Changes since v3:
- Above patches have been squashed into this patch.

 arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 72 +++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
index bf3c246d13d1..3145e680e2d3 100644
--- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
@@ -9,7 +9,9 @@
 /dts-v1/;
 
 #include <dt-bindings/net/ti-dp83867.h>
+#include <dt-bindings/phy/phy.h>
 #include "k3-j722s.dtsi"
+#include "k3-serdes.h"
 
 / {
 	compatible = "ti,j722s-evm", "ti,j722s";
@@ -202,6 +204,12 @@ J722S_IOPAD(0x0130, PIN_OUTPUT, 0) /* (AG26) RGMII1_TXC */
 			J722S_IOPAD(0x012c, PIN_OUTPUT, 0) /* (AF25) RGMII1_TX_CTL */
 		>;
 	};
+
+	main_usb1_pins_default: main-usb1-default-pins {
+		pinctrl-single,pins = <
+			J722S_IOPAD(0x0258, PIN_INPUT, 0) /* (B27) USB1_DRVVBUS */
+		>;
+	};
 };
 
 &cpsw3g {
@@ -301,6 +309,13 @@ exp1: gpio@23 {
 				  "PCIe0_1L_RC_RSTz", "PCIe0_1L_PRSNT#",
 				  "ENET1_EXP_SPARE2", "ENET1_EXP_PWRDN",
 				  "PD_I2ENET1_I2CMUX_SELC_IRQ", "ENET1_EXP_RESETZ";
+
+		p05-hog {
+			/* P05 - USB2.0_MUX_SEL */
+			gpio-hog;
+			gpios = <5 GPIO_ACTIVE_HIGH>;
+			output-high;
+		};
 	};
 };
 
@@ -384,3 +399,60 @@ &sdhci1 {
 	status = "okay";
 	bootph-all;
 };
+
+&serdes_ln_ctrl {
+	idle-states = <J722S_SERDES0_LANE0_USB>,
+		      <J722S_SERDES1_LANE0_PCIE0_LANE0>;
+};
+
+&serdes0 {
+	status = "okay";
+	serdes0_usb_link: phy@0 {
+		reg = <0>;
+		cdns,num-lanes = <1>;
+		#phy-cells = <0>;
+		cdns,phy-type = <PHY_TYPE_USB3>;
+		resets = <&serdes_wiz0 1>;
+	};
+};
+
+&serdes1 {
+	serdes1_pcie_link: phy@0 {
+		reg = <0>;
+		cdns,num-lanes = <1>;
+		#phy-cells = <0>;
+		cdns,phy-type = <PHY_TYPE_PCIE>;
+		resets = <&serdes_wiz1 1>;
+	};
+};
+
+&pcie0_rc {
+	status = "okay";
+	reset-gpios = <&exp1 18 GPIO_ACTIVE_HIGH>;
+	phys = <&serdes1_pcie_link>;
+	phy-names = "pcie-phy";
+};
+
+&usbss0 {
+	ti,vbus-divider;
+	status = "okay";
+};
+
+&usb0 {
+	dr_mode = "otg";
+	usb-role-switch;
+};
+
+&usbss1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&main_usb1_pins_default>;
+	ti,vbus-divider;
+	status = "okay";
+};
+
+&usb1 {
+	dr_mode = "host";
+	maximum-speed = "super-speed";
+	phys = <&serdes0_usb_link>;
+	phy-names = "cdns3,usb3-phy";
+};
-- 
2.40.1