[nrf fromtree] tests: boards: nrf: i2s: i2s_divider: Confirm CLK value

tests/boards/nrf/i2s/i2s_divider/CMakeLists.txt

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(i2s_divider)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/boards/nrf/i2s/i2s_divider/boards/nrf52840dk_nrf52840.overlay

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		i2s-node0 = &i2s0;
+	};
+};
+
+&pinctrl {
+	i2s0_default_alt: i2s0_default_alt {
+		group1 {
+			psels = <NRF_PSEL(I2S_SCK_M, 1, 5)>,
+				<NRF_PSEL(I2S_LRCK_M, 1, 6)>,
+				<NRF_PSEL(I2S_SDOUT, 1, 1)>,
+				<NRF_PSEL(I2S_SDIN, 1, 2)>;
+		};
+	};
+};
+
+&i2s0 {
+	status = "okay";
+	pinctrl-0 = <&i2s0_default_alt>;
+	pinctrl-names = "default";
+};

tests/boards/nrf/i2s/i2s_divider/boards/nrf5340dk_nrf5340_cpuapp.overlay

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		i2s-node0 = &i2s0;
+	};
+};
+
+&pinctrl {
+	i2s0_default_alt: i2s0_default_alt {
+		group1 {
+			psels = <NRF_PSEL(I2S_SCK_M, 1, 6)>,
+				<NRF_PSEL(I2S_LRCK_M, 1, 7)>,
+				<NRF_PSEL(I2S_SDOUT, 0, 4)>,
+				<NRF_PSEL(I2S_SDIN, 0, 5)>;
+		};
+	};
+};
+
+&uart1 {
+	status = "disabled";
+};
+
+&i2s0 {
+	status = "okay";
+	pinctrl-0 = <&i2s0_default_alt>;
+	pinctrl-names = "default";
+};

tests/boards/nrf/i2s/i2s_divider/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		i2s-node0 = &i2s20;
+	};
+};
+
+&pinctrl {
+	i2s20_default_alt: i2s20_default_alt {
+		group1 {
+			psels = <NRF_PSEL(I2S_SCK_M, 1, 11)>,
+				<NRF_PSEL(I2S_LRCK_M, 1, 12)>,
+				<NRF_PSEL(I2S_SDOUT, 1, 8)>,
+				<NRF_PSEL(I2S_SDIN, 1, 9)>;
+		};
+	};
+};
+
+&i2s20 {
+	status = "okay";
+	pinctrl-0 = <&i2s20_default_alt>;
+	pinctrl-names = "default";
+};

tests/boards/nrf/i2s/i2s_divider/prj.conf

@@ -0,0 +1,3 @@
+CONFIG_ZTEST=y
+CONFIG_I2S=y
+CONFIG_I2S_LOG_LEVEL_INF=y

tests/boards/nrf/i2s/i2s_divider/src/main.c

@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/ztest.h>
+#include <zephyr/drivers/i2s.h>
+#include <zephyr/sys/iterable_sections.h>
+
+#define I2S_DEV_NODE DT_ALIAS(i2s_node0)
+
+#define WORD_SIZE 16U
+#define NUMBER_OF_CHANNELS 2
+#define FRAME_CLK_FREQ 44100
+
+#define NUM_BLOCKS 2
+#define TIMEOUT 1000
+
+#define SAMPLES_COUNT 4
+/* Each word has one bit set */
+static const int16_t data[SAMPLES_COUNT] = {16, 32, 64, 128};
+
+#define BLOCK_SIZE (2 * sizeof(data))
+
+#ifdef CONFIG_NOCACHE_MEMORY
+	#define MEM_SLAB_CACHE_ATTR __nocache
+#else
+	#define MEM_SLAB_CACHE_ATTR
+#endif /* CONFIG_NOCACHE_MEMORY */
+
+static char MEM_SLAB_CACHE_ATTR __aligned(WB_UP(32))
+	_k_mem_slab_buf_tx_0_mem_slab[NUM_BLOCKS * WB_UP(BLOCK_SIZE)];
+STRUCT_SECTION_ITERABLE(k_mem_slab, tx_0_mem_slab) =
+	Z_MEM_SLAB_INITIALIZER(tx_0_mem_slab, _k_mem_slab_buf_tx_0_mem_slab,
+				WB_UP(BLOCK_SIZE), NUM_BLOCKS);
+
+static const struct device *dev_i2s;
+
+static const struct i2s_config default_i2s_cfg = {
+	.word_size = WORD_SIZE,
+	.channels = NUMBER_OF_CHANNELS,
+	.format = I2S_FMT_DATA_FORMAT_I2S,
+	.frame_clk_freq = FRAME_CLK_FREQ,
+	.block_size = BLOCK_SIZE,
+	.timeout = TIMEOUT,
+	.options = I2S_OPT_FRAME_CLK_MASTER | I2S_OPT_BIT_CLK_MASTER,
+	.mem_slab = &tx_0_mem_slab,
+};
+
+/** @brief Check actual PCM rate at frame_clk_freq=8000.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_08000)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 8000;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+/** @brief Check actual PCM rate at frame_clk_freq=16000.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_16000)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 16000;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+/** @brief Check actual PCM rate at frame_clk_freq=32000.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_32000)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 32000;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+/** @brief Check actual PCM rate at frame_clk_freq=44100.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_44100)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 44100;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+/** @brief Check actual PCM rate at frame_clk_freq=48000.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_48000)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 48000;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+/** @brief Check actual PCM rate at frame_clk_freq=88200.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_88200)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 88200;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+/** @brief Check actual PCM rate at frame_clk_freq=96000.
+ *
+ * - Configure I2S stream.
+ */
+ZTEST(drivers_i2s_clk_div, test_i2s_frame_clk_freq_96000)
+{
+	struct i2s_config i2s_cfg = default_i2s_cfg;
+	int ret;
+
+	i2s_cfg.frame_clk_freq = 96000;
+
+	ret = i2s_configure(dev_i2s, I2S_DIR_TX, &i2s_cfg);
+	zassert_ok(ret, "i2s_configure() returned %d", ret);
+}
+
+static void *suite_setup(void)
+{
+	/* Check I2S Device. */
+	dev_i2s = DEVICE_DT_GET_OR_NULL(I2S_DEV_NODE);
+	zassert_not_null(dev_i2s, "I2S device not found");
+	zassert(device_is_ready(dev_i2s), "I2S device not ready");
+
+	return 0;
+}
+
+ZTEST_SUITE(drivers_i2s_clk_div, NULL, suite_setup, NULL, NULL, NULL);

tests/boards/nrf/i2s/i2s_divider/testcase.yaml

@@ -0,0 +1,32 @@
+tests:
+  boards.nrf.i2s.i2s_divider:
+    tags:
+      - drivers
+      - i2s
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "test_i2s_frame_clk_freq_08000"
+        - "I2S MCK frequency: 256000, actual PCM rate: 8000"
+        - "test_i2s_frame_clk_freq_16000"
+        - "I2S MCK frequency: 507936, actual PCM rate: 15873"
+        - "test_i2s_frame_clk_freq_32000"
+        - "I2S MCK frequency: 1032258, actual PCM rate: 32258"
+        - "test_i2s_frame_clk_freq_44100"
+        - "I2S MCK frequency: 1391304, actual PCM rate: 43478"
+        - "test_i2s_frame_clk_freq_48000"
+        - "I2S MCK frequency: 1523809, actual PCM rate: 47619"
+        - "test_i2s_frame_clk_freq_88200"
+        - "I2S MCK frequency: 2909090, actual PCM rate: 90909"
+        - "test_i2s_frame_clk_freq_96000"
+        - "I2S MCK frequency: 3200000, actual PCM rate: 100000"
+        - "PROJECT EXECUTION SUCCESSFUL"
+    platform_allow:
+      - nrf52840dk/nrf52840
+      - nrf5340dk/nrf5340/cpuapp
+      - nrf54l15dk/nrf54l15/cpuapp
+    integration_platforms:
+      - nrf52840dk/nrf52840
+      - nrf54l15dk/nrf54l15/cpuapp

tests/drivers/i2s/i2s_speed/Kconfig

@@ -39,43 +39,43 @@ config I2S_TEST_ALLOWED_DATA_OFFSET
 	  value of this option may be needed when GPIO loopback is used.
 
 config I2S_TEST_SKIP_SAMPLERATE_8000
-	bool "Skip short transfer tests at 8000 samples per socond"
+	bool "Skip short transfer tests at 8000 samples per second"
 	help
 	  When set to 'y', short transfer tests at 8000 samples per second
 	  will be skipped.
 
 config I2S_TEST_SKIP_SAMPLERATE_16000
-	bool "Skip short transfer tests at 16000 samples per socond"
+	bool "Skip short transfer tests at 16000 samples per second"
 	help
 	  When set to 'y', short transfer tests at 16000 samples per second
 	  will be skipped.
 
 config I2S_TEST_SKIP_SAMPLERATE_32000
-	bool "Skip short transfer tests at 32000 samples per socond"
+	bool "Skip short transfer tests at 32000 samples per second"
 	help
 	  When set to 'y', short transfer tests at 32000 samples per second
 	  will be skipped.
 
 config I2S_TEST_SKIP_SAMPLERATE_44100
-	bool "Skip short transfer tests at 44100 samples per socond"
+	bool "Skip short transfer tests at 44100 samples per second"
 	help
 	  When set to 'y', short transfer tests at 44100 samples per second
 	  will be skipped.
 
 config I2S_TEST_SKIP_SAMPLERATE_48000
-	bool "Skip short transfer tests at 48000 samples per socond"
+	bool "Skip short transfer tests at 48000 samples per second"
 	help
 	  When set to 'y', short transfer tests at 48000 samples per second
 	  will be skipped.
 
 config I2S_TEST_SKIP_SAMPLERATE_88200
-	bool "Skip short transfer tests at 88200 samples per socond"
+	bool "Skip short transfer tests at 88200 samples per second"
 	help
 	  When set to 'y', short transfer tests at 88200 samples per second
 	  will be skipped.
 
 config I2S_TEST_SKIP_SAMPLERATE_96000
-	bool "Skip short transfer tests at 96000 samples per socond"
+	bool "Skip short transfer tests at 96000 samples per second"
 	help
 	  When set to 'y', short transfer tests at 96000 samples per second
 	  will be skipped.