test: spi_loopback: nxp: Add Flexio spi test support

Add overlay file for RT1170 EVK and simply existing flexio spi overlay
file for RT1060 EVKC and RT1064 EVK. One flexio-spi interface for both slow
and fast tests. Fast baud rate set to 16Mbps now.

Signed-off-by: Raymond Lei <raymond.lei@nxp.com>

drivers/spi/spi_mcux_flexio.c

@@ -199,13 +199,13 @@ static void spi_flexio_master_init(FLEXIO_SPI_Type *base, flexio_spi_master_conf
 	timerConfig.timerEnable     = kFLEXIO_TimerEnableOnTriggerHigh;
 	timerConfig.timerStop       = kFLEXIO_TimerStopBitEnableOnTimerDisable;
 	timerConfig.timerStart      = kFLEXIO_TimerStartBitEnabled;
-	/* Low 8-bits are used to configure baudrate. */
+	/* Low 8-bits are used to configure baud rate. */
 	timerDiv = (uint16_t)(srcClock_Hz / masterConfig->baudRate_Bps);
 
-	/* Add protection if the required band rate overflows.
-	 * FLEXIO input freq can't meet required band rate. Max band rate can
+	/* Add protection if the required baud rate overflows.
+	 * FLEXIO input freq can't meet required baud rate. Max baud rate can
 	 * not exceed 1/4 of input freq. You can raise input freq or lower
-	 * bandrate required to remove this warning.
+	 * baud rate required to remove this warning.
 	 */
 	if (timerDiv < 4) {
 		timerDiv = 4;
@@ -214,7 +214,7 @@ static void spi_flexio_master_init(FLEXIO_SPI_Type *base, flexio_spi_master_conf
 	timerDiv += timerDiv & 1UL;
 
 	if (masterConfig->baudRate_Bps != (srcClock_Hz / timerDiv)) {
-		LOG_WRN("Bandrate req:%uKbps, got:%uKbps",
+		LOG_WRN("baud rate req:%uKbps, got:%uKbps",
 			(uint32_t)(masterConfig->baudRate_Bps / 1000),
 			(uint32_t)(srcClock_Hz / (timerDiv*1000)));
 	}

tests/drivers/spi/spi_loopback/boards/mimxrt1170_evk_mimxrt1176_cm7_flexio_spi.overlay

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&lpspi1 {
+	dmas = <&edma0 0 36>, <&edma0 1 37>;
+	dma-names = "rx", "tx";
+	status = "disabled";
+};
+
+
+&pinctrl {
+	pinmux_flexio2spi1: pinmux_flexio2spi1 {
+		group0 {
+			pinmux = <&iomuxc_gpio_ad_29_gpio9_io28>, /* cs */
+				 <&iomuxc_gpio_ad_28_flexio2_flexio28>, /* sck */
+				 <&iomuxc_gpio_ad_30_flexio2_flexio30>, /* sdo */
+				 <&iomuxc_gpio_ad_31_flexio2_flexio31>; /* sdi */
+			drive-strength = "high";
+			slew-rate = "slow";
+
+		};
+	};
+};
+
+
+&flexio2 {
+	status = "okay";
+
+	flexio2spi1: flexio2spi1 {
+		compatible = "nxp,flexio-spi";
+		cs-gpios = <&gpio9 28 GPIO_ACTIVE_LOW>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		sdo-pin = <30>;
+		sdi-pin = <31>;
+		sck-pin = <28>;
+		pinctrl-0 = <&pinmux_flexio2spi1>;
+		pinctrl-names = "default";
+		status = "okay";
+
+		slow@0 {
+			compatible = "test-spi-loopback-slow";
+			reg = <0>;
+			spi-max-frequency = <500000>;
+		};
+		fast@0 {
+			compatible = "test-spi-loopback-fast";
+			reg = <0>;
+			spi-max-frequency = <16000000>;
+		};
+	};
+};

tests/drivers/spi/spi_loopback/overlay-mcux-flexio-spi.overlay

@@ -1,34 +1,28 @@
 /*
  * Copyright (c) 2024, STRIM, ALC
+ * Copyright (c) 2025, NXP
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
+ /* On RT1060 EVKC, SPI loopback test, short J17-9 and J17-10
+  * On RT1064 EVK,  SPI loopback test, short J24-9 and J24-10
+  */
+
 &pinctrl {
 	pinmux_flexio3spi0: pinmux_flexio3spi0 {
 		group0 {
 			pinmux =
 				<&iomuxc_gpio_ad_b0_03_gpio1_io03>, /* cs */
 				<&iomuxc_gpio_ad_b1_10_flexio3_flexio10>, /* sck */
-				<&iomuxc_gpio_ad_b1_01_flexio3_flexio01>, /* sdo */
-				<&iomuxc_gpio_ad_b1_04_flexio3_flexio04>; /* sdi */
-			drive-strength = "r0-6";
-			slew-rate = "slow";
-			nxp,speed = "150-mhz";
-		};
-	};
-	pinmux_flexio3spi1: pinmux_flexio3spi1 {
-		group0 {
-			pinmux =
-				<&iomuxc_gpio_ad_b0_02_gpio1_io02>, /* cs */
-				<&iomuxc_gpio_ad_b1_11_flexio3_flexio11>, /* sck */
 				<&iomuxc_gpio_ad_b1_00_flexio3_flexio00>, /* sdo */
-				<&iomuxc_gpio_ad_b1_05_flexio3_flexio05>; /* sdi */
+				<&iomuxc_gpio_ad_b1_01_flexio3_flexio01>; /* sdi */
 			drive-strength = "r0-6";
 			slew-rate = "slow";
 			nxp,speed = "150-mhz";
 		};
 	};
+
 };
 
 &flexio3 {
@@ -39,8 +33,8 @@
 		#address-cells = <1>;
 		#size-cells = <0>;
 		cs-gpios = <&gpio1 3 GPIO_ACTIVE_LOW>;
-		sdo-pin = <1>;
-		sdi-pin = <4>;
+		sdo-pin = <0>;
+		sdi-pin = <1>;
 		sck-pin = <10>;
 		pinctrl-0 = <&pinmux_flexio3spi0>;
 		pinctrl-names = "default";
@@ -50,28 +44,13 @@
 			reg = <0>;
 			spi-max-frequency = <500000>;
 		};
-	};
-	flexio3_spi1: flexio3_spi1 {
-		compatible = "nxp,flexio-spi";
-		status = "okay";
-		#address-cells = <1>;
-		#size-cells = <0>;
-		cs-gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;
-		sdo-pin = <0>;
-		sdi-pin = <5>;
-		sck-pin = <11>;
-		pinctrl-0 = <&pinmux_flexio3spi1>;
-		pinctrl-names = "default";
+
 		fast@0 {
 			status = "okay";
 			compatible = "test-spi-loopback-fast";
 			reg = <0>;
-			spi-max-frequency = <4000000>;
+			spi-max-frequency = <16000000>;
 		};
 	};
-};
 
-/* pinmux_lpspi3 overlaps pinmux_flexio3spi1 */
-&lpspi3 {
-	status = "disabled";
 };

tests/drivers/spi/spi_loopback/testcase.yaml

@@ -196,12 +196,21 @@ tests:
     extra_args: DTC_OVERLAY_FILE="overlay-mcux-flexio-spi.overlay"
     filter: CONFIG_DT_HAS_NXP_FLEXIO_ENABLED and
             CONFIG_DT_HAS_NXP_FLEXIO_SPI_ENABLED
-    platform_allow: mimxrt1064_evk
+    platform_allow:
+      - mimxrt1064_evk
+      - mimxrt1060_evk/mimxrt1062/qspi
+  drivers.spi.mimxrt1170_evk_mimxrt1176_cm7_flexio_spi.loopback:
+    extra_args: DTC_OVERLAY_FILE="boards/mimxrt1170_evk_mimxrt1176_cm7_flexio_spi.overlay"
+    filter: CONFIG_DT_HAS_NXP_FLEXIO_ENABLED and
+            CONFIG_DT_HAS_NXP_FLEXIO_SPI_ENABLED
+    platform_allow:
+      - mimxrt1170_evk/mimxrt1176/cm7
   drivers.spi.mimxrt1040evk_flexio_spi.loopback:
     extra_args: DTC_OVERLAY_FILE="boards/mimxrt1040_evk_flexio_spi.overlay"
     filter: CONFIG_DT_HAS_NXP_FLEXIO_ENABLED and
             CONFIG_DT_HAS_NXP_FLEXIO_SPI_ENABLED
-    platform_allow: mimxrt1040_evk
+    platform_allow:
+      - mimxrt1040_evk
   drivers.spi.nrf54h_fast_2mhz:
     extra_args:
       - DTC_OVERLAY_FILE="boards/nrf54h20dk_nrf54h20_cpuapp_fast.overlay"