Add Microchip MEC1653B SoC, DTS, and board.

boards/microchip/mec_assy6941/Kconfig.mec_assy6941

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_MEC_ASSY6941
+	select SOC_MEC1653B_NSZ if BOARD_MEC_ASSY6941_MEC1653B_NSZ
 	select SOC_MEC1743_QLJ if BOARD_MEC_ASSY6941_MEC1743_QLJ
 	select SOC_MEC1743_QSZ if BOARD_MEC_ASSY6941_MEC1743_QSZ
 	select SOC_MEC1753_QLJ if BOARD_MEC_ASSY6941_MEC1753_QLJ

boards/microchip/mec_assy6941/Kconfig.mec_assy6941_mec1653b_nsz

@@ -0,0 +1,5 @@
+# Copyright (c) 2025, Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_MEC_ASSY6941_MEC1653B_NSZ
+	select SOC_MEC1653B_NSZ

boards/microchip/mec_assy6941/board.yml

@@ -3,6 +3,7 @@ board:
   full_name: MEC17xxEVB ASSY6941
   vendor: microchip
   socs:
+  - name: mec1653b_nsz
   - name: mec1743_qlj
   - name: mec1743_qsz
   - name: mec1753_qlj

boards/microchip/mec_assy6941/mec_assy6941_mec1653b_nsz.dts

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2025, Microchip Technology Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <microchip/mec/mec5_mec1653bnsz.dtsi>
+#include <microchip/mec5/mec1653b-nsz-b0-pinctrl.dtsi>
+
+/ {
+	model = "Microchip MEC ASSY6941 MEC1753B-NSZ evaluation board";
+	compatible = "microchip,mec_assy6941-mec1653b_nsz";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &uart1;
+		rtimer-busy-wait-timer = &timer5;
+	};
+
+	power-states {
+		idle: idle {
+			compatible = "zephyr,power-state";
+			power-state-name = "suspend-to-idle";
+			min-residency-us = <1000000>;
+		};
+
+		suspend_to_ram: suspend_to_ram {
+			compatible = "zephyr,power-state";
+			power-state-name = "suspend-to-ram";
+			min-residency-us = <2000000>;
+		};
+	};
+};
+
+&cpu0 {
+	clock-frequency = <96000000>;
+	status = "okay";
+	cpu-power-states = <&idle &suspend_to_ram>;
+};
+
+/* Disable ARM SysTick kernel timer driver */
+&systick {
+	status = "disabled";
+};
+
+/* Enable MCHP kernel timer driver using 32KHz RTOS timer and 1MHz basic timer */
+&rtimer {
+	status = "okay";
+};
+
+/* We chose 32-bit basic timer 5 for use by ktimer */
+&timer5 {
+	status = "okay";
+};
+
+&uart1 {
+	compatible = "microchip,mec5-uart";
+	status = "okay";
+	clock-frequency = <1843200>;
+	current-speed = <115200>;
+	pinctrl-0 = <&uart1_tx_gpio170 &uart1_rx_gpio171>;
+	pinctrl-names = "default";
+};

boards/microchip/mec_assy6941/mec_assy6941_mec1653b_nsz.yaml

@@ -0,0 +1,25 @@
+#
+# Copyright (c) 2025, Microchip Technology Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+identifier: mec_assy6941/mec1653b_nsz
+name: MEC174X EVB ASSY 6941 with MEC1653B-NSZ
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+ram: 60
+flash: 352
+supported:
+  - gpio
+  - pinctrl
+testing:
+  binaries:
+    - spi_image.bin
+  ignore_tags:
+    - bluetooth
+    - net
+vendor: microchip

boards/microchip/mec_assy6941/mec_assy6941_mec1653b_nsz_defconfig

@@ -0,0 +1,8 @@
+# Copyright (c) 2025, Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_GPIO=y
+CONFIG_SERIAL=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y

dts/arm/microchip/mec/mec5.dtsi

@@ -267,6 +267,7 @@
 			compatible = "microchip,xec-basic-timer";
 			reg = <0x40000ca0 0x20>;
 			interrupts = <141 0>;
+			girqs = <23 5>;
 			clock-frequency = <48000000>;
 			prescaler = <0>;
 			max-value = <0xffffffff>;
@@ -488,21 +489,6 @@
 			interrupts = <87 0>;
 			status = "disabled";
 		};
-		rcid0: rcid@40001400 {
-			reg = <0x40001400 0x80>;
-			interrupts = <80 0>;
-			status = "disabled";
-		};
-		rcid1: rcid@40001480 {
-			reg = <0x40001480 0x80>;
-			interrupts = <81 0>;
-			status = "disabled";
-		};
-		rcid2: rcid@40001500 {
-			reg = <0x40001500 0x80>;
-			interrupts = <82 0>;
-			status = "disabled";
-		};
 		bbled0: bbled@4000b800 {
 			reg = <0x4000b800 0x100>;
 			interrupts = <83 0>;
@@ -518,16 +504,6 @@
 			interrupts = <85 0>;
 			status = "disabled";
 		};
-		bbled3: bbled@4000bb00 {
-			reg = <0x4000bb00 0x100>;
-			interrupts = <86 0>;
-			status = "disabled";
-		};
-		bclink0: bclink@4000cd00 {
-			reg = <0x4000cd00 0x20>;
-			interrupts = <96 0>, <97 0>;
-			status = "disabled";
-		};
 		tfdp0: tfdp@40008c00 {
 			reg = <0x40008c00 0x10>;
 			status = "disabled";

dts/arm/microchip/mec/mec5/mec5_bclink.dtsi

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2025 Microchip Technology Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* From Microchip MEC5 MEC174x and onwards includes one instance of the
+ * BC-Link peripheral.
+ * Include this file in the soc {} section in the relevant chip DTSI files
+ */
+bclink0: bclink@4000cd00 {
+	reg = <0x4000cd00 0x20>;
+	interrupts = <96 3>, <97 3>;
+	interrupt-names = "bcm_err", "bcm_done";
+	girqs = <18 7>, <18 6>;
+	status = "disabled";
+};

dts/arm/microchip/mec/mec5/mec5_rcid.dtsi

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2025 Microchip Technology Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* From Microchip MEC5 MEC174x and onwards include three instances of the
+ * RC-ID peripheral.
+ * Include this file in the soc {} section in the relevant chip DTSI files
+ */
+rcid0: rcid@40001400 {
+	reg = <0x40001400 0x80>;
+	interrupts = <80 3>;
+	girqs = <17 10>;
+	status = "disabled";
+};
+
+rcid1: rcid@40001480 {
+	reg = <0x40001480 0x80>;
+	interrupts = <81 3>;
+	girqs = <17 11>;
+	status = "disabled";
+};
+
+rcid2: rcid@40001500 {
+	reg = <0x40001500 0x80>;
+	interrupts = <82 3>;
+	girqs = <17 12>;
+	status = "disabled";
+};

dts/arm/microchip/mec/mec5_mec1653bnsz.dtsi

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2025 Microchip Technology Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <arm/armv7-m.dtsi>
+
+#include "mec5.dtsi"
+
+/ {
+	flash0: flash@b0000 {
+		reg = <0x000b0000 0x58000>;
+	};
+
+	sram0: memory@118000 {
+		compatible = "mmio-sram";
+		reg = <0x00118000 0xf800>;
+	};
+
+	soc {
+		#include "mec5/mec5_dma_chan20.dtsi"
+		#include "mec5/mec5_eeprom_8kb.dtsi"
+		#include "mec5/mec5_i3c.dtsi"
+
+		ps2_1: ps2@40009040 {
+			reg = <0x40009040 0x40>;
+			interrupts = <101 3>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		kscan0: kscan@40009c00 {
+			reg = <0x40009c00 0x18>;
+			interrupts = <135 0>;
+			status = "disabled";
+		};
+
+		uart2: uart@400f2c00 {
+			reg = <0x400f2c00 0x400>;
+			interrupts = <183 2>;
+			clock-frequency = <1843200>;
+			current-speed = <115200>;
+			status = "disabled";
+		};
+	};
+};

dts/arm/microchip/mec/mec5_mec1743qlj.dtsi

@@ -23,12 +23,43 @@
 		#include "mec5/mec5_gpspi_v2.dtsi"
 		#include "mec5/mec5_eeprom_8kb.dtsi"
 		#include "mec5/mec5_pkg176_pwms.dtsi"
-		#include "mec5/mec5_pkg176_uarts.dtsi"
+		#include "mec5/mec5_rcid.dtsi"
+		#include "mec5/mec5_bclink.dtsi"
+
+		ps2_1: ps2@40009040 {
+			reg = <0x40009040 0x40>;
+			interrupts = <101 3>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
 
 		kscan0: kscan@40009c00 {
 			reg = <0x40009c00 0x18>;
 			interrupts = <135 0>;
 			status = "disabled";
 		};
+
+		bbled3: bbled@4000bb00 {
+			reg = <0x4000bb00 0x100>;
+			interrupts = <86 3>;
+			status = "disabled";
+		};
+
+		uart2: uart@400f2c00 {
+			reg = <0x400f2c00 0x400>;
+			interrupts = <183 2>;
+			clock-frequency = <1843200>;
+			current-speed = <115200>;
+			status = "disabled";
+		};
+
+		uart3: uart@400f3000 {
+			reg = <0x400f3000 0x400>;
+			interrupts = <184 2>;
+			clock-frequency = <1843200>;
+			current-speed = <115200>;
+			status = "disabled";
+		};
 	};
 };

dts/arm/microchip/mec/mec5_mec1743qsz.dtsi

@@ -22,18 +22,34 @@
 		#include "mec5/mec5_dma_chan16.dtsi"
 		#include "mec5/mec5_gpspi_v2.dtsi"
 		#include "mec5/mec5_eeprom_8kb.dtsi"
+		#include "mec5/mec5_rcid.dtsi"
+		#include "mec5/mec5_bclink.dtsi"
+
+		ps2_1: ps2@40009040 {
+			reg = <0x40009040 0x40>;
+			interrupts = <101 3>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
 
 		kscan0: kscan@40009c00 {
 			reg = <0x40009c00 0x18>;
 			interrupts = <135 0>;
 			status = "disabled";
 		};
 
+		bbled3: bbled@4000bb00 {
+			reg = <0x4000bb00 0x100>;
+			interrupts = <86 3>;
+			status = "disabled";
+		};
+
 		uart2: uart@400f2c00 {
 			reg = <0x400f2c00 0x400>;
-			interrupts = <183 1>;
+			interrupts = <183 2>;
 			clock-frequency = <1843200>;
-			current-speed = <38400>;
+			current-speed = <115200>;
 			status = "disabled";
 		};
 	};