arm64: dts: freescale: imx93-phyboard-nash: Add jtag overlay

Add overlay to enable JTAG pins on the board's JTAG (X41) connector.

Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index 1512f0d437cf110e27fbb4b21b4fd44ccf04c2a6..ac24c563c3c8c8512439a9e16b7ebb43e29c0280 100644 (file)
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -380,10 +380,12 @@ dtb-$(CONFIG_ARCH_MXC) += imx93-kontron-bl-osm-s.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-segin.dtb
 
+imx93-phyboard-nash-jtag-dtbs += imx93-phyboard-nash.dtb imx93-phyboard-nash-jtag.dtbo
 imx93-phyboard-nash-peb-wlbt-07-dtbs += imx93-phyboard-nash.dtb imx93-phyboard-nash-peb-wlbt-07.dtbo
 imx93-phyboard-segin-peb-eval-01-dtbs += imx93-phyboard-segin.dtb imx93-phyboard-segin-peb-eval-01.dtbo
 imx93-phyboard-segin-peb-wlbt-05-dtbs += imx93-phyboard-segin.dtb imx93-phyboard-segin-peb-wlbt-05.dtbo
 imx93-phycore-rpmsg-dtbs += imx93-phyboard-nash.dtb imx93-phyboard-segin.dtb imx93-phycore-rpmsg.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash-jtag.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-nash-peb-wlbt-07.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-segin-peb-eval-01.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx93-phyboard-segin-peb-wlbt-05.dtb

diff --git a/arch/arm64/boot/dts/freescale/imx93-phyboard-nash-jtag.dtso b/arch/arm64/boot/dts/freescale/imx93-phyboard-nash-jtag.dtso
new file mode 100644 (file)
index 0000000..89f93dc
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx93-phyboard-nash-jtag.dtso
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2025 PHYTEC Messtechnik GmbH
+ * Author: Primoz Fiser <primoz.fiser@norik.com>
+ */
+
+#include "imx93-pinfunc.h"
+
+/dts-v1/;
+/plugin/;
+
+/*
+ * NOTE: Bind pinctrl_jtag to gpio2 so that the pinctrl settings are applied.
+ * JTAG itself has no dedicated driver, so without attaching it to an active
+ * device node (like gpio2), the pinmux configuration would not take effect.
+ */
+&gpio2 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_jtag>;
+};
+
+&iomuxc {
+       pinctrl_jtag: jtaggrp {
+               fsl,pins = <
+                       MX93_PAD_GPIO_IO24__JTAG_MUX_TDO        0x31e
+                       MX93_PAD_GPIO_IO25__JTAG_MUX_TCK        0x31e
+                       MX93_PAD_GPIO_IO26__JTAG_MUX_TDI        0x31e
+                       MX93_PAD_GPIO_IO27__JTAG_MUX_TMS        0x31e
+               >;
+       };
+};