zephyrproject-rtos · EmilioCBen · Apr 4, 2025 · Apr 14, 2025 · Apr 20, 2025
diff --git a/boards/nxp/frdm_mcxw71/frdm_mcxw71-pinctrl.dtsi b/boards/nxp/frdm_mcxw71/frdm_mcxw71-pinctrl.dtsi
@@ -80,4 +80,21 @@
 			slew-rate = "fast";
 		};
 	};
+
+	pinmux_i3c: pinmux_i3c {
+		group0 {
+			pinmux = <I3C0_SDA_PTB4>,
+				<I3C0_SCL_PTB5>;
+			slew-rate = "fast";
+			drive-strength = "low";
+			input-enable;
+			bias-pull-up;
+		};
+		group1 {
+			pinmux = <I3C0_PUR_PTC2>;
+			slew-rate = "fast";
+			drive-strength = "low";
+			input-enable;
+		};
+	};
 };
diff --git a/boards/nxp/frdm_mcxw71/frdm_mcxw71.dts b/boards/nxp/frdm_mcxw71/frdm_mcxw71.dts
@@ -8,6 +8,7 @@
 #include <nxp/nxp_mcxw71.dtsi>
 #include "frdm_mcxw71-pinctrl.dtsi"
 #include <zephyr/dt-bindings/input/input-event-codes.h>
+#include <freq.h>
 
 / {
 	model = "NXP FRDM-MCXW71 board";
@@ -18,6 +19,7 @@
 		blue-pwm-led = &blue_pwm_led;
 		green-pwm-led = &green_pwm_led;
 		red-pwm-led = &red_pwm_led;
+		ambient-temp0 = &p3t1755;
 	};
 
 	chosen {
@@ -90,18 +92,6 @@
 	pinctrl-names = "default";
 };
 
-&lpi2c1 {
-	status = "okay";
-	pinctrl-0 = <&pinmux_lpi2c1>;
-	pinctrl-names = "default";
-
-	accelerometer: accelerometer@19 {
-		status = "okay";
-		compatible = "nxp,fxls8974";
-		reg = <0x19>;
-	};
-};
-
 &lpspi1 {
 	status = "okay";
 	pinctrl-0 = <&pinmux_lpspi1>;
@@ -191,3 +181,10 @@
 &rtc {
 	status = "okay";
 };
+
+&i3c0 {
+	pinctrl-0 = <&pinmux_i3c>;
+	pinctrl-names = "default";
+};
+
+p3t1755dp_ard_i3c_interface: &i3c0 {};
diff --git a/boards/nxp/frdm_mcxw71/frdm_mcxw71.yaml b/boards/nxp/frdm_mcxw71/frdm_mcxw71.yaml
@@ -14,6 +14,7 @@ supported:
   - flash
   - gpio
   - i2c
+  - i3c
   - pinctrl
   - pwm
   - regulator

diff --git a/boards/shields/p3t1755dp_ard_i3c/boards/frdm_mcxw71.overlay b/boards/shields/p3t1755dp_ard_i3c/boards/frdm_mcxw71.overlay
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * The p3t1755 shield board is plugged into the arduino interface on
+ * the FRDM-MCXW71 board, and the J13 on the shield board is connected
+ * to the J22 on the MCXW71 referred below.
+ * J13-1 -> J22-8; J13-2 -> J22-6;
+ * J13-3 -> J22-1; J13-4 -> J22-10;
+ */
+
+#include <freq.h>
+
+&i3c0 {
+	status = "okay";
+
+	i2c-scl-hz = <DT_FREQ_K(200)>;
+	i3c-scl-hz = <DT_FREQ_K(1200)>;
+	i3c-od-scl-hz = <DT_FREQ_K(600)>;
+};
+
+&lpi2c1 {
+	status = "disabled";
+};
diff --git a/drivers/clock_control/clock_control_mcux_scg_k4.c b/drivers/clock_control/clock_control_mcux_scg_k4.c
@@ -64,6 +64,9 @@ static int mcux_scg_k4_get_rate(const struct device *dev, clock_control_subsys_t
 	case SCG_K4_RTCOSC_CLK:
 		clock_name = kCLOCK_RtcOscClk;
 		break;
+	case SCG_K4_I3C_CLK:
+		*rate = CLOCK_GetIpFreq(kCLOCK_I3c0);
+		return 0;
 	default:
 		LOG_ERR("Unsupported clock name");
 		return -EINVAL;

diff --git a/dts/arm/nxp/nxp_mcxw7x_common.dtsi b/dts/arm/nxp/nxp_mcxw7x_common.dtsi
@@ -343,6 +343,19 @@
 		clock-frequency = <32768>;
 		prescaler = <32768>;
 	};
+
+	i3c0: i3c@40035000 {
+		compatible = "nxp,mcux-i3c";
+		reg = <0x40035000 0xFFF>;
+		interrupts = <41 0>;
+		clocks = <&scg SCG_K4_I3C_CLK 0xd4>;
+		clk-divider = <15>;
+		clk-divider-slow = <1>;
+		clk-divider-tc = <1>;
+		status = "disabled";
+		#address-cells = <3>;
+		#size-cells = <0>;
+	};
 };
 
 &fast_peripheral0 {

diff --git a/include/zephyr/dt-bindings/clock/scg_k4.h b/include/zephyr/dt-bindings/clock/scg_k4.h
@@ -12,3 +12,4 @@
 #define SCG_K4_SIRC_CLK    6U
 #define SCG_K4_FIRC_CLK    7U
 #define SCG_K4_RTCOSC_CLK  8U
+#define SCG_K4_I3C_CLK     9U
diff --git a/samples/sensor/thermometer/sample.yaml b/samples/sensor/thermometer/sample.yaml
@@ -42,3 +42,4 @@ tests:
       - platform:mimxrt1180_evk/mimxrt1189/cm33:SHIELD=p3t1755dp_ard_i3c
       - platform:mimxrt1180_evk/mimxrt1189/cm7:SHIELD=p3t1755dp_ard_i3c
       - platform:frdm_mcxn236/mcxn236:SHIELD=p3t1755dp_ard_i3c
+      - platform:frdm_mcxw71:SHIELD=p3t1755dp_ard_i3c
diff --git a/soc/nxp/mcx/mcxw/soc.c b/soc/nxp/mcx/mcxw/soc.c
@@ -131,6 +131,8 @@ __weak void clock_init(void)
 	CLOCK_SetIpSrc(kCLOCK_Lpspi1, kCLOCK_IpSrcFro192M);
 	CLOCK_SetIpSrc(kCLOCK_Lpadc0, kCLOCK_IpSrcFro192M);
 	CLOCK_SetIpSrcDiv(kCLOCK_Lpadc0, kSCG_SysClkDivBy10);
+	CLOCK_SetIpSrc(kCLOCK_I3c0, kCLOCK_IpSrcFro192M);
+	CLOCK_SetIpSrcDiv(kCLOCK_I3c0, DT_PROP(DT_NODELABEL(i3c0), clk_divider));
 
 	/* Ungate clocks if the peripheral is enabled in devicetree */
 	if (DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(gpioa), nxp_kinetis_gpio, okay)) {
@@ -188,6 +190,10 @@ __weak void clock_init(void)
 	if (DT_NODE_HAS_COMPAT_STATUS(adc0, nxp_lpadc, okay)) {
 		CLOCK_EnableClock(kCLOCK_Lpadc0);
 	}
+
+	if (DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(i3c0), nxp_mcux_i3c, okay)) {
+		CLOCK_EnableClock(kCLOCK_I3c0);
+	}
 }
 
 static void vbat_init(void)
-Original file line number
+Diff line change
@@ Expand Up / @@ -14,6 +14,7 @@ supported: @@
       - flash
       - gpio
       - i2c
+      - i3c
       - pinctrl
       - pwm
       - regulator
@@ Expand Down @@