tests: drivers: spi: spi_error_cases: add from zephyr, support L20

Taken from zephyr to check support for L20.

Signed-off-by: Piotr Kosycarz <piotr.kosycarz@nordicsemi.no>

Author: nordic-piks

tests/drivers/spi/spi_error_cases/CMakeLists.txt

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(spi_error_cases)
+
+target_sources(app PRIVATE ${ZEPHYR_BASE}/tests/drivers/spi/spi_error_cases/src/main.c)

tests/drivers/spi/spi_error_cases/README.txt

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+This sample extends the same-named Zephyr sample to verify it
+with Nordic development kits.
+
+Source code and basic configuration files can be found in the corresponding folder structure in zephyr/tests/drivers/spi/spi_error_cases.

tests/drivers/spi/spi_error_cases/boards/nrf54l20pdk_nrf54l20_cpuapp.overlay

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+&pinctrl {
+	spi22_default_alt: spi22_default_alt {
+		group1 {
+			psels = <NRF_PSEL(SPIM_SCK, 1, 9)>,
+				<NRF_PSEL(SPIM_MISO, 1, 10)>,
+				<NRF_PSEL(SPIM_MOSI, 1, 2)>;
+		};
+	};
+
+	spi22_sleep_alt: spi22_sleep_alt {
+		group1 {
+			psels = <NRF_PSEL(SPIM_SCK, 1, 9)>,
+				<NRF_PSEL(SPIM_MISO, 1, 10)>,
+				<NRF_PSEL(SPIM_MOSI, 1, 2)>;
+			low-power-enable;
+		};
+	};
+
+	spi21_default_alt: spi21_default_alt {
+		group1 {
+			psels = <NRF_PSEL(SPIS_SCK, 1, 8)>,
+				<NRF_PSEL(SPIS_MISO, 1, 11)>,
+				<NRF_PSEL(SPIS_MOSI, 1, 3)>,
+				<NRF_PSEL(SPIS_CSN, 1, 1)>;
+		};
+	};
+
+	spi21_sleep_alt: spi21_sleep_alt {
+		group1 {
+			psels = <NRF_PSEL(SPIS_SCK, 1, 8)>,
+				<NRF_PSEL(SPIS_MISO, 1, 11)>,
+				<NRF_PSEL(SPIS_MOSI, 1, 3)>,
+				<NRF_PSEL(SPIS_CSN, 1, 1)>;
+			low-power-enable;
+		};
+	};
+
+};
+
+
+&gpio1 {
+	status = "okay";
+};
+
+&spi22 {
+	status = "okay";
+	pinctrl-0 = <&spi22_default_alt>;
+	pinctrl-1 = <&spi22_sleep_alt>;
+	pinctrl-names = "default", "sleep";
+	overrun-character = <0x00>;
+	cs-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>;
+	dut_spi_dt: test-spi-dev@0 {
+		compatible = "vnd,spi-device";
+		reg = <0>;
+		spi-max-frequency = <4000000>;
+	};
+};
+
+dut_spis: &spi21 {
+	compatible = "nordic,nrf-spis";
+	status = "okay";
+	def-char = <0x00>;
+	pinctrl-0 = <&spi21_default_alt>;
+	pinctrl-1 = <&spi21_sleep_alt>;
+	pinctrl-names = "default", "sleep";
+	/delete-property/rx-delay-supported;
+	/delete-property/rx-delay;
+};
+
+&uicr {
+	nfct-pins-as-gpios;
+};

tests/drivers/spi/spi_error_cases/prj.conf

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+CONFIG_SPI=y
+CONFIG_SPI_SLAVE=y
+CONFIG_GPIO=y
+CONFIG_POLL=y
+CONFIG_SPI_ASYNC=y
+CONFIG_SPI_EXTENDED_MODES=y
+CONFIG_ZTEST=y

tests/drivers/spi/spi_error_cases/testcase.yaml

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+common:
+  # depends_on: spi
+  tags:
+    - drivers
+    - spi
+    - ci_tests_drivers_spi
+  harness: ztest
+  harness_config:
+    fixture: gpio_spi_loopback
+tests:
+  nrf.extended.drivers.spi.spi_error_cases:
+    platform_allow:
+      - nrf54l20pdk/nrf54l20/cpuapp
+    integration_platforms:
+      - nrf54l20pdk/nrf54l20/cpuapp