boards: arm: mr_canhubk3: enable support for LPSPI

Configure LPSPI instances on this board. All of them are routed with SDI
and SDO data pins inverted.

Enable SPI tests without DMA support for the moment.

Signed-off-by: Manuel Argüelles <manuel.arguelles@nxp.com>

boards/arm/mr_canhubk3/doc/index.rst

@@ -53,6 +53,7 @@ QSPI          on-chip     flash
 FLEXCAN       on-chip     can
 LPI2C         on-chip     i2c
 ADC SAR       on-chip     adc
+LPSPI         on-chip     spi
 ============  ==========  ================================
 
 The default configuration can be found in the Kconfig file

boards/arm/mr_canhubk3/mr_canhubk3-pinctrl.dtsi

@@ -194,4 +194,63 @@
 			output-enable;
 		};
 	};
+
+	lpspi1_default: lpspi1_default {
+		group1 {
+			pinmux = <PTA28_LPSPI1_SCK_O>, <PTA29_LPSPI1_SIN_O>,
+				<PTA21_LPSPI1_PCS0_O>, <PTE4_LPSPI1_PCS1_O>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <PTA30_LPSPI1_SOUT_I>;
+			input-enable;
+		};
+	};
+
+	lpspi2_default: lpspi2_default {
+		group1 {
+			pinmux = <PTB29_LPSPI2_SCK_O>, <PTB28_LPSPI2_SIN_O>,
+				<PTB25_LPSPI2_PCS0_O>, <PTC19_LPSPI2_PCS1_O>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <PTB27_LPSPI2_SOUT_I>;
+			input-enable;
+		};
+	};
+
+	lpspi3_default: lpspi3_default {
+		group1 {
+			pinmux = <PTD1_LPSPI3_SCK_O>, <PTE10_LPSPI3_SIN_O>,
+				<PTD17_LPSPI3_PCS0_O>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <PTD0_LPSPI3_SOUT_I>;
+			input-enable;
+		};
+	};
+
+	lpspi4_default: lpspi4_default {
+		group1 {
+			pinmux = <PTB10_LPSPI4_SCK_O>, <PTB11_LPSPI4_SIN_O>,
+				<PTB8_LPSPI4_PCS0_O>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <PTB9_LPSPI4_SOUT_I>;
+			input-enable;
+		};
+	};
+
+	lpspi5_default: lpspi5_default {
+		group1 {
+			pinmux = <PTD26_LPSPI5_SCK_O>, <PTD28_LPSPI5_SIN_O>;
+			output-enable;
+		};
+		group2 {
+			pinmux = <PTD27_LPSPI5_SOUT_I>;
+			input-enable;
+		};
+	};
 };

boards/arm/mr_canhubk3/mr_canhubk3.dts

@@ -320,3 +320,33 @@
 	pinctrl-names = "default";
 	clock-frequency = <I2C_BITRATE_STANDARD>;
 };
+
+&lpspi1 {
+	pinctrl-0 = <&lpspi1_default>;
+	pinctrl-names = "default";
+	data-pin-config = "sdo-in,sdi-out";
+};
+
+&lpspi2 {
+	pinctrl-0 = <&lpspi2_default>;
+	pinctrl-names = "default";
+	data-pin-config = "sdo-in,sdi-out";
+};
+
+&lpspi3 {
+	pinctrl-0 = <&lpspi3_default>;
+	pinctrl-names = "default";
+	data-pin-config = "sdo-in,sdi-out";
+};
+
+&lpspi4 {
+	pinctrl-0 = <&lpspi4_default>;
+	pinctrl-names = "default";
+	data-pin-config = "sdo-in,sdi-out";
+};
+
+&lpspi5 {
+	pinctrl-0 = <&lpspi5_default>;
+	pinctrl-names = "default";
+	data-pin-config = "sdo-in,sdi-out";
+};

boards/arm/mr_canhubk3/mr_canhubk3.yaml

@@ -15,3 +15,4 @@ supported:
   - can
   - i2c
   - adc
+  - spi

tests/drivers/spi/spi_loopback/boards/mr_canhubk3.overlay

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2023 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&lpspi1 {
+	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 = <5000000>;
+	};
+};