[PATCH v2 3/3] arm64: dts: ti: Add DT overlay for PCIe + USB3.0 SERDES personality card

[Roger Quadros]

From: Kishon Vijay Abraham I <kishon@xxxxxx>

Add overlay for PCIe (uses the second instance of PCIe in AM654x) and
USB3.0 SERDES personality card

The PCI3/USB3 card is provided with the AM65x GP EVM configurtion [1]
so apply the overlay to k3-am654-gp-evm.dtb

[1] https://www.ti.com/lit/ug/spruim7/spruim7.pdf

Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Roger Quadros <rogerq@xxxxxxxxxx>
---
Changelog:

v2:
- drop PCIe endpoint settings as it no longer exists in base tree.

v1: https://lore.kernel.org/all/20240126114530.40913-4-rogerq@xxxxxxxxxx/
---
 arch/arm64/boot/dts/ti/Makefile                |  5 ++-
 arch/arm64/boot/dts/ti/k3-am654-pcie-usb3.dtso | 61 ++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index f534c373c958..75033b6e8693 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -45,7 +45,9 @@ dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
 
 # Boards with AM65x SoC
-k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb k3-am654-base-board-rocktech-rk101-panel.dtbo
+k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb \
+	k3-am654-base-board-rocktech-rk101-panel.dtbo \
+	k3-am654-pcie-usb3.dtbo
 k3-am654-evm-dtbs := k3-am654-base-board.dtb k3-am654-icssg2.dtbo
 k3-am654-idk-dtbs := k3-am654-evm.dtb k3-am654-idk.dtbo k3-am654-pcie-usb2.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic.dtb
@@ -59,6 +61,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am654-evm.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am654-idk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am654-base-board-rocktech-rk101-panel.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am654-pcie-usb2.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am654-pcie-usb3.dtbo
 
 # Boards with J7200 SoC
 k3-j7200-evm-dtbs := k3-j7200-common-proc-board.dtb k3-j7200-evm-quad-port-eth-exp.dtbo
diff --git a/arch/arm64/boot/dts/ti/k3-am654-pcie-usb3.dtso b/arch/arm64/boot/dts/ti/k3-am654-pcie-usb3.dtso
new file mode 100644
index 000000000000..e463163f2b7b
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am654-pcie-usb3.dtso
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * DT overlay for SERDES personality card: 1lane PCIe + USB3.0 DRD on AM654 EVM
+ *
+ * Copyright (C) 2018-2024 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/phy/phy.h>
+#include <dt-bindings/phy/phy-am654-serdes.h>
+
+#include "k3-pinctrl.h"
+
+&serdes1 {
+	status = "okay";
+};
+
+&pcie1_rc {
+	num-lanes = <1>;
+	phys = <&serdes1 PHY_TYPE_PCIE 0>;
+	phy-names = "pcie-phy0";
+	reset-gpios = <&pca9555 5 GPIO_ACTIVE_HIGH>;
+	status = "okay";
+};
+
+&main_pmx0 {
+	usb0_pins_default: usb0_pins_default {
+		pinctrl-single,pins = <
+			AM65X_IOPAD(0x02bc, PIN_OUTPUT, 0) /* (AD9) USB0_DRVVBUS */
+		>;
+	};
+};
+
+&serdes0 {
+	status = "okay";
+	assigned-clocks = <&k3_clks 153 4>, <&serdes0 AM654_SERDES_CMU_REFCLK>;
+	assigned-clock-parents = <&k3_clks 153 7>, <&k3_clks 153 4>;
+};
+
+&dwc3_0 {
+	status = "okay";
+	assigned-clock-parents = <&k3_clks 151 4>,      /* set REF_CLK to 20MHz i.e. PER0_PLL/48 */
+	<&k3_clks 151 8>;      /* set PIPE3_TXB_CLK to WIZ8B2M4VSB */
+	phys = <&serdes0 PHY_TYPE_USB3 0>;
+	phy-names = "usb3-phy";
+};
+
+&usb0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&usb0_pins_default>;
+	dr_mode = "host";
+	maximum-speed = "super-speed";
+	snps,dis-u1-entry-quirk;
+	snps,dis-u2-entry-quirk;
+};
+
+&usb0_phy {
+	status = "okay";
+};

-- 
2.34.1