tests: spi_loopback: Rework test

* Move test to using devicetree for various "device" params.
* Move test to using spi_dt_spec to simplify code

Signed-off-by: Kumar Gala <[email protected]>

Author: galak

tests/drivers/spi/spi_loopback/Kconfig

@@ -4,34 +4,5 @@ mainmenu "SPI Loopback Test"
 
 source "Kconfig.zephyr"
 
-config SPI_LOOPBACK_DRV_NAME
-	string "SPI device name to use for test"
-
-config SPI_LOOPBACK_CS_GPIO
-	bool "SPI port CS pin is controlled via a GPIO port during test"
-	depends on GPIO
-
-config SPI_LOOPBACK_CS_CTRL_GPIO_DRV_NAME
-	string "The GPIO port which is used to control CS"
-	depends on SPI_LOOPBACK_CS_GPIO
-	default "GPIO_0"
-
-config SPI_LOOPBACK_CS_CTRL_GPIO_PIN
-	int "The GPIO PIN which is used to act as a CS pin"
-	depends on SPI_LOOPBACK_CS_GPIO
-	default 0
-
-config SPI_LOOPBACK_SLAVE_NUMBER
-	int "Slave number from 0 to host controller slave limit"
-	default 0
-
-config SPI_LOOPBACK_SLOW_FREQ
-	int "The frequency in Hz to use when testing in slow mode"
-	default 500000
-
-config SPI_LOOPBACK_FAST_FREQ
-	int "The frequency in Hz to use when testing in fast mode"
-	default 16000000
-
 config SPI_LOOPBACK_MODE_LOOP
 	bool "Configure the SPI in LOOP mode, so that no extra wiring is needed"

tests/drivers/spi/spi_loopback/boards/96b_carbon.conf

@@ -1,2 +1 @@
-CONFIG_SPI_LOOPBACK_DRV_NAME="SPI_2"
 CONFIG_SPI_STM32_INTERRUPT=y

tests/drivers/spi/spi_loopback/boards/96b_carbon.overlay

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2022 Kumar Gala <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi2 {
+	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/boards/96b_stm32_sensor_mez.conf

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2022 Kumar Gala <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi4 {
+	cs-gpios = <&gpioe 11 GPIO_ACTIVE_LOW>;
+	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/boards/96b_stm32_sensor_mez.overlay

@@ -1,5 +1,2 @@
-CONFIG_SPI_LOOPBACK_DRV_NAME="SERCOM1"
+CONFIG_GPIO=y
 CONFIG_SPI_LOOPBACK_MODE_LOOP=y
-CONFIG_SPI_LOOPBACK_CS_GPIO=y
-CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_DRV_NAME="PORTA"
-CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_PIN=7

tests/drivers/spi/spi_loopback/boards/adafruit_itsybitsy_m4_express.conf

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2022 Kumar Gala <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&sercom1 {
+	cs-gpios = <&porta 7 GPIO_ACTIVE_LOW>;
+	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/boards/adafruit_itsybitsy_m4_express.overlay

@@ -1,4 +1,2 @@
-CONFIG_SPI_LOOPBACK_DRV_NAME="SERCOM4"
-CONFIG_SPI_LOOPBACK_CS_GPIO=y
-CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_DRV_NAME="PINMUX_A"
-CONFIG_SPI_LOOPBACK_CS_CTRL_GPIO_PIN=3
+CONFIG_GPIO=y
+CONFIG_SPI_ASYNC=n

tests/drivers/spi/spi_loopback/boards/arduino_zero.conf

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2022 Kumar Gala <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&sercom4 {
+	cs-gpios = <&porta 3 GPIO_ACTIVE_LOW>;
+	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/boards/arduino_zero.overlay

@@ -4,5 +4,4 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-CONFIG_SPI_LOOPBACK_DRV_NAME="DAPLINK_SINGLE_SPI_0"
 CONFIG_SPI_LOOPBACK_MODE_LOOP=y