[PATCH v4 5/5] arm64: dts: ti: hummingboard-t: add overlays for m.2 pci-e and usb-3

Josua Mayer
2024-02-02T16:11:27Z

HummingBoard-T features two M.2 connectors labeled "M1" and "M2".
The single SerDes lane of the SoC can be routed to either M1 pci-e
signals, or M2 usb-3 signals by a gpio-controlled mux.

Add overlays for each configuration.

Signed-off-by: Josua Mayer <josua@solid-run.com>
---
arch/arm64/boot/dts/ti/Makefile | 6 +++
.../boot/dts/ti/k3-am642-hummingboard-t-pcie.dtso | 45 ++++++++++++++++++++++
.../boot/dts/ti/k3-am642-hummingboard-t-usb3.dtso | 44 +++++++++++++++++++++
3 files changed, 95 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 041c3b71155e..ace72b4b85b0 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -31,8 +31,14 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62a7-sk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am62p5-sk.dtb

# Boards with AM64x SoC
+k3-am642-hummingboard-t-pcie-dtbs := \
+ k3-am642-hummingboard-t.dtb k3-am642-hummingboard-t-pcie.dtbo
+k3-am642-hummingboard-t-usb3-dtbs := \
+ k3-am642-hummingboard-t.dtb k3-am642-hummingboard-t-usb3.dtbo
dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-pcie.dtb
+dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-usb3.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-tqma64xxl-mbax4xxl.dtb
diff --git a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-pcie.dtso b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-pcie.dtso
new file mode 100644
index 000000000000..fd3f8d00c56a
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-pcie.dtso
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Josua Mayer <josua@solid-run.com>
+ *
+ * Overlay for SolidRun AM642 HummingBoard-T to enable PCI-E.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/phy/phy.h>
+
+#include "k3-serdes.h"
+
+&pcie0_rc {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pcie0_pins_default>;
+ reset-gpios = <&main_gpio1 15 GPIO_ACTIVE_HIGH>;
+ phys = <&serdes0_link>;
+ phy-names = "pcie-phy";
+ num-lanes = <1>;
+ status = "okay";
+};
+
+&serdes0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ serdes0_link: phy@0 {
+ reg = <0>;
+ cdns,num-lanes = <1>;
+ cdns,phy-type = <PHY_TYPE_PCIE>;
+ #phy-cells = <0>;
+ resets = <&serdes_wiz0 1>;
+ };
+};
+
+&serdes_ln_ctrl {
+ idle-states = <AM64_SERDES0_LANE0_PCIE0>;
+};
+
+&serdes_mux {
+ idle-state = <1>;
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-usb3.dtso b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-usb3.dtso
new file mode 100644
index 000000000000..ffcc3bd3c7bc
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-usb3.dtso
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Josua Mayer <josua@solid-run.com>
+ *
+ * Overlay for SolidRun AM642 HummingBoard-T to enable USB-3.1.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/phy/phy.h>
+
+#include "k3-serdes.h"
+
+&serdes0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ serdes0_link: phy@0 {
+ reg = <0>;
+ cdns,num-lanes = <1>;
+ cdns,phy-type = <PHY_TYPE_USB3>;
+ #phy-cells = <0>;
+ resets = <&serdes_wiz0 1>;
+ };
+};
+
+&serdes_ln_ctrl {
+ idle-states = <AM64_SERDES0_LANE0_USB>;
+};
+
+&serdes_mux {
+ idle-state = <0>;
+};
+
+&usbss0 {
+ /delete-property/ ti,usb2-only;
+};
+
+&usb0 {
+ maximum-speed = "super-speed";
+ phys = <&serdes0_link>;
+ phy-names = "cdns3,usb3-phy";
+};

--
2.35.3