arm64: dts: ti: hummingboard-t: add overlays for m.2 pci-e and usb-3

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>
Link: https://lore.kernel.org/r/20240219-add-am64-som-v7-4-0e6e95b0a05d@solid-run.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 0531a368cf69d2475771bcdbee48c1d8321eddf7..9a722c2473fb7c3330a576188e22dbb1995d483c 100644 (file)
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -38,9 +38,15 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-csi2-imx219.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-hdmi-audio.dtbo
 
 # 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-evm-icssg1-dualemac.dtbo
 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 (file)
index 0000000..bd9a5ca
--- /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_default_pins>;
+       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 (file)
index 0000000..ffcc3bd
--- /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";
+};