tests: drivers: adc: adc_api: add dma test

Move ADC DMA tests directly into adc_api test for Kinetis and STM32 boards.
Needs to disable CONFIG_TEST_USERSPACE for this subtest because of caching
issue for STM32H7 (as it was done dor adc_dma test).

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

tests/drivers/adc/adc_api/Kconfig

@@ -0,0 +1,12 @@
+# ADC API test configuration options
+
+# Copyright (c) 2024 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+mainmenu "ADC API Test"
+
+source "Kconfig.zephyr"
+
+config ADC_API_SAMPLE_INTERVAL_US
+	int "Interval between repeatead samples in us"
+	default 0

tests/drivers/adc/adc_api/boards/frdm_k64f.overlay

@@ -13,6 +13,11 @@
 &adc0 {
 	#address-cells = <1>;
 	#size-cells = <0>;
+	clk-source = <0>;
+	hw-trigger-src = <4>;
+	continuous-convert;
+	high-speed;
+	periodic-trigger;
 	status = "okay";
 
 	channel@e {
@@ -23,3 +28,11 @@
 		zephyr,resolution = <12>;
 	};
 };
+
+test_counter: &pit0_channel0 {
+	status = "okay";
+};
+
+&edma0 {
+	dma-buf-addr-alignment = <4>;
+};

tests/drivers/adc/adc_api/boards/frdm_k82f.overlay

@@ -13,6 +13,11 @@
 &adc0 {
 	#address-cells = <1>;
 	#size-cells = <0>;
+	clk-source = <0>;
+	hw-trigger-src = <4>;
+	continuous-convert;
+	high-speed;
+	periodic-trigger;
 	status = "okay";
 
 	channel@f {
@@ -23,3 +28,11 @@
 		zephyr,resolution = <12>;
 	};
 };
+
+test_counter: &pit0_channel0 {
+	status = "okay";
+};
+
+&edma0 {
+	dma-buf-addr-alignment = <4>;
+};

tests/drivers/adc/adc_api/boards/nucleo_f401re.overlay

@@ -12,6 +12,10 @@
 };
 
 &adc1 {
+	dmas = <&dma2 0 0 (STM32_DMA_PERIPH_RX | STM32_DMA_MEM_16BITS |
+		STM32_DMA_PERIPH_16BITS) STM32_DMA_FIFO_FULL>;
+	dma-names = "dma";
+
 	pinctrl-0 = <&adc1_in0_pa0 &adc1_in1_pa1>;
 	#address-cells = <1>;
 	#size-cells = <0>;
@@ -32,3 +36,7 @@
 		zephyr,resolution = <12>;
 	};
 };
+
+&dma2 {
+	status = "okay";
+};

tests/drivers/adc/adc_api/boards/nucleo_h743zi.conf

@@ -0,0 +1 @@
+CONFIG_NOCACHE_MEMORY=y

tests/drivers/adc/adc_api/boards/nucleo_h743zi.overlay

@@ -4,6 +4,8 @@
  * Copyright (c) Benjamin Björnsson <benjamin.bjornsson@gmail.com>
  */
 
+#include <zephyr/dt-bindings/memory-attr/memory-attr-arm.h>
+
 / {
 	zephyr,user {
 		/* adjust channel number according to pinmux in board.dts */
@@ -11,7 +13,15 @@
 	};
 };
 
+&sram2 {
+	zephyr,memory-attr = < DT_MEM_ARM(ATTR_MPU_RAM_NOCACHE) >;
+};
+
 &adc1 {
+	dmas = <&dmamux1 0 9 (STM32_DMA_PERIPH_RX | STM32_DMA_MEM_16BITS |
+		STM32_DMA_PERIPH_16BITS)>;
+	dma-names = "dmamux";
+
 	#address-cells = <1>;
 	#size-cells = <0>;
 
@@ -31,3 +41,15 @@
 		zephyr,resolution = <16>;
 	};
 };
+
+&dma1 {
+	status = "okay";
+};
+
+&dma2 {
+	status = "okay";
+};
+
+&dmamux1 {
+	status = "okay";
+};

tests/drivers/adc/adc_api/boards/nucleo_l476rg.overlay

@@ -12,6 +12,9 @@
 };
 
 &adc1 {
+	dmas = <&dma1 1 0 (STM32_DMA_PERIPH_RX | STM32_DMA_MEM_16BITS | STM32_DMA_PERIPH_16BITS)>;
+	dma-names = "dma";
+
 	#address-cells = <1>;
 	#size-cells = <0>;
 
@@ -23,3 +26,7 @@
 		zephyr,resolution = <10>;
 	};
 };
+
+&dma1 {
+	status = "okay";
+};

tests/drivers/adc/adc_api/boards/nucleo_u575zi_q.overlay

@@ -12,6 +12,9 @@
 };
 
 &adc1 {
+	dmas = <&gpdma1 0 0 (STM32_DMA_PERIPH_RX | STM32_DMA_MEM_16BITS | STM32_DMA_PERIPH_16BITS)>;
+	dma-names = "gpdma";
+
 	#address-cells = <1>;
 	#size-cells = <0>;
 
@@ -23,3 +26,7 @@
 		zephyr,resolution = <12>;
 	};
 };
+
+&gpdma1 {
+	status = "okay";
+};

tests/drivers/adc/adc_api/overlay-dma-kinetis.conf

@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2020, NXP
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_TEST_USERSPACE=n
+CONFIG_ADC_MCUX_ADC16_ENABLE_EDMA=y
+CONFIG_ADC_MCUX_ADC16_HW_TRIGGER=y
+CONFIG_COUNTER=y
+CONFIG_ADC_ASYNC=y
+CONFIG_DMA=y
+CONFIG_ADC_API_SAMPLE_INTERVAL_US=30000

tests/drivers/adc/adc_api/overlay-dma-stm32.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2024 STMicroelectronics
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+CONFIG_TEST_USERSPACE=n
+CONFIG_ADC_STM32_DMA=y

tests/drivers/adc/adc_api/src/test_adc.c

@@ -7,6 +7,8 @@
 
 
 #include <zephyr/drivers/adc.h>
+#include <zephyr/drivers/dma.h>
+#include <zephyr/drivers/counter.h>
 #include <zephyr/kernel.h>
 #include <zephyr/ztest.h>
 
@@ -18,8 +20,18 @@
 #define INVALID_ADC_VALUE SHRT_MIN
 #endif
 
+#if CONFIG_NOCACHE_MEMORY
+#define __NOCACHE	__attribute__((__section__(".nocache")))
+#else /* CONFIG_NOCACHE_MEMORY */
+#define __NOCACHE
+#endif /* CONFIG_NOCACHE_MEMORY */
+
 #define BUFFER_SIZE  6
+#ifdef CONFIG_TEST_USERSPACE
 static ZTEST_BMEM int16_t m_sample_buffer[BUFFER_SIZE];
+#else
+static __aligned(32) int16_t m_sample_buffer[BUFFER_SIZE] __NOCACHE;
+#endif
 
 #define DT_SPEC_AND_COMMA(node_id, prop, idx) ADC_DT_SPEC_GET_BY_IDX(node_id, idx),
 
@@ -43,6 +55,26 @@ const struct device *get_adc_device(void)
 	return adc_channels[0].dev;
 }
 
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(test_counter), okay) && \
+	defined(CONFIG_COUNTER)
+static void init_counter(void)
+{
+	int err;
+	const struct device *const dev = DEVICE_DT_GET(DT_NODELABEL(test_counter));
+	struct counter_top_cfg top_cfg = { .callback = NULL,
+					   .user_data = NULL,
+					   .flags = 0 };
+
+	zassert_true(device_is_ready(dev), "Counter device is not ready");
+
+	counter_start(dev);
+	top_cfg.ticks = counter_us_to_ticks(dev, CONFIG_ADC_API_SAMPLE_INTERVAL_US);
+	err = counter_set_top_value(dev, &top_cfg);
+	zassert_equal(0, err, "%s: Counter failed to set top value (err: %d)",
+		      dev->name, err);
+}
+#endif
+
 static void init_adc(void)
 {
 	int i, ret;
@@ -57,6 +89,11 @@ static void init_adc(void)
 	for (i = 0; i < BUFFER_SIZE; ++i) {
 		m_sample_buffer[i] = INVALID_ADC_VALUE;
 	}
+
+#if DT_NODE_HAS_STATUS(DT_NODELABEL(test_counter), okay) && \
+	defined(CONFIG_COUNTER)
+	init_counter();
+#endif
 }
 
 static void check_samples(int expected_count)
@@ -156,7 +193,7 @@ static int test_task_asynchronous_call(void)
 	const struct adc_sequence_options options = {
 		.extra_samplings = 4,
 		/* Start consecutive samplings as fast as possible. */
-		.interval_us     = 0,
+		.interval_us     = CONFIG_ADC_API_SAMPLE_INTERVAL_US,
 	};
 	struct adc_sequence sequence = {
 		.options     = &options,
@@ -295,7 +332,7 @@ static int test_task_repeated_samplings(void)
 		 */
 		.extra_samplings = 2,
 		/* Start consecutive samplings as fast as possible. */
-		.interval_us     = 0,
+		.interval_us     = CONFIG_ADC_API_SAMPLE_INTERVAL_US,
 	};
 	struct adc_sequence sequence = {
 		.options     = &options,

tests/drivers/adc/adc_api/testcase.yaml

@@ -9,6 +9,30 @@ tests:
     min_flash: 40
   drivers.adc.b_u585i_iot02a_adc4:
     extra_args:
-      DTC_OVERLAY_FILE="boards/b_u585i_iot02a_adc4.overlay"
+      - DTC_OVERLAY_FILE="boards/b_u585i_iot02a_adc4.overlay"
     platform_allow:
       - b_u585i_iot02a
+  drivers.adc.dma_st_stm32:
+    extra_args:
+      - OVERLAY_CONFIG="overlay-dma-stm32.conf"
+    depends_on:
+      - adc
+      - dma
+    min_flash: 40
+    platform_allow:
+      - nucleo_f401re
+      - nucleo_h743zi
+      - nucleo_l476rg
+      - nucleo_u575zi_q
+  drivers.adc.dma_nxp_kinetis:
+    extra_args:
+      - OVERLAY_CONFIG="overlay-dma-kinetis.conf"
+    depends_on:
+      - adc
+      - dma
+    min_flash: 40
+    platform_allow:
+      - frdm_k64f
+      - frdm_k82f
+    integration_platforms:
+      - frdm_k82f