[v2,2/3] arm64: dts: ti: Add DT overlay for PCIe + USB2.0 SERDES personality card
Commit Message
From: Roger Quadros <rogerq@ti.com>
Enable both SERDES and PCIe DT nodes in order to get PCIe working on
the SERDES PCIe x2 personality card.
The daughter card also has a USB 2.0 dual-role port. As the base board
already supports a 2.0 dual-role port, enable the port on the SERDES
card to be a host only port.
This will prevent user confusion as having 2 ports in device mode often
leads to confusion as to which port is bound to the gadget function driver.
The PCIe x2 card is provided with the AM65x IDK configuration [1]
so apply the overlay to k3-am654-idk.dtb
[1] https://www.ti.com/lit/ug/spruim6a/spruim6a.pdf
Co-developed-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
Changelog:
v2:
- Drop PCIe endpoint settings as it no longer exists in base tree.
v1: https://lore.kernel.org/all/20240126114530.40913-3-rogerq@kernel.org/
---
arch/arm64/boot/dts/ti/Makefile | 3 +-
arch/arm64/boot/dts/ti/k3-am654-pcie-usb2.dtso | 59 ++++++++++++++++++++++++++
2 files changed, 61 insertions(+), 1 deletion(-)
@@ -47,7 +47,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
# Boards with AM65x SoC
k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb k3-am654-base-board-rocktech-rk101-panel.dtbo
k3-am654-evm-dtbs := k3-am654-base-board.dtb k3-am654-icssg2.dtbo
-k3-am654-idk-dtbs := k3-am654-evm.dtb k3-am654-idk.dtbo
+k3-am654-idk-dtbs := k3-am654-evm.dtb k3-am654-idk.dtbo k3-am654-pcie-usb2.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am6528-iot2050-basic-pg2.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am6548-iot2050-advanced.dtb
@@ -58,6 +58,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am654-gp-evm.dtb
dtb-$(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
# Boards with J7200 SoC
k3-j7200-evm-dtbs := k3-j7200-common-proc-board.dtb k3-j7200-evm-quad-port-eth-exp.dtbo
new file mode 100644
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/**
+ * DT overlay for SERDES personality card: 2lane PCIe + USB2.0 Host on AM654 EVM
+ *
+ * Copyright (C) 2018-2024 Texas Instruments Incorporated - https://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"
+
+&serdes0 {
+ assigned-clocks = <&k3_clks 153 4>,
+ <&serdes0 AM654_SERDES_CMU_REFCLK>,
+ <&serdes0 AM654_SERDES_RO_REFCLK>;
+ assigned-clock-parents = <&k3_clks 153 8>,
+ <&k3_clks 153 4>,
+ <&k3_clks 153 4>;
+ status = "okay";
+};
+
+&serdes1 {
+ assigned-clocks = <&serdes1 AM654_SERDES_CMU_REFCLK>;
+ assigned-clock-parents = <&serdes0 AM654_SERDES_RO_REFCLK>;
+ status = "okay";
+};
+
+&pcie0_rc {
+ num-lanes = <2>;
+ phys = <&serdes0 PHY_TYPE_PCIE 1>, <&serdes1 PHY_TYPE_PCIE 1>;
+ phy-names = "pcie-phy0", "pcie-phy1";
+ 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 */
+ >;
+ };
+};
+
+&dwc3_0 {
+ status = "okay";
+};
+
+&usb0_phy {
+ status = "okay";
+};
+
+&usb0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&usb0_pins_default>;
+ dr_mode = "host";
+};