tests: sdio: Add write test to SDIO subsystem

This commit expands the SDIO subsystem test
suite by adding support for write test.
Also this commit adds needed conf/overlay
files for arduino portenta h7, nicla vision
and giga r1 for wifi_nm tests

Signed-off-by: Sara Touqan <[email protected]>

Author: ExaltZephyr

tests/net/wifi/wifi_nm/testcase.yaml

@@ -12,3 +12,7 @@ tests:
     platform_exclude:
       - rd_rw612_bga/rw612/ethernet # Requires binary blobs to build
       - frdm_rw612 # Requires binary blobs to build
+      - arduino_giga_r1/stm32h747xx/m7 # Requires binary blobs to build
+      - arduino_nicla_vision/stm32h747xx/m7 # Requires binary blobs to build
+      - arduino_portenta_h7/stm32h747xx/m7 # Requires binary blobs to build
+      - [email protected]/stm32h747xx/m7 # Requires binary blobs to build

tests/subsys/sd/sdio/boards/arduino_giga_r1_stm32h747xx_m7.conf

@@ -0,0 +1,4 @@
+# Copyright (c) 2025 EXALT Technologies.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_HEAP_MEM_POOL_SIZE=24576

tests/subsys/sd/sdio/boards/arduino_giga_r1_stm32h747xx_m7.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025 EXALT Technologies.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&wifi {
+	status = "disabled";
+};

tests/subsys/sd/sdio/boards/arduino_nicla_vision_stm32h747xx_m7.conf

@@ -0,0 +1,4 @@
+# Copyright (c) 2025 EXALT Technologies.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_HEAP_MEM_POOL_SIZE=24576

tests/subsys/sd/sdio/boards/arduino_nicla_vision_stm32h747xx_m7.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025 EXALT Technologies.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&wifi {
+	status = "disabled";
+};

tests/subsys/sd/sdio/boards/arduino_portenta_h7_stm32h747xx_m7.conf

@@ -0,0 +1,4 @@
+# Copyright (c) 2025 EXALT Technologies.
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_HEAP_MEM_POOL_SIZE=24576

tests/subsys/sd/sdio/boards/arduino_portenta_h7_stm32h747xx_m7.overlay

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 EXALT Technologies.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&boot_partition{
+	reg = <0x00000000 0x00020000>;
+};
+&scratch_partition {
+	reg = <0x00020000 0x00020000>;
+};
+&slot0_partition {
+	reg = <0x00040000 0x001C0000>;
+};
+&slot1_partition {
+	reg = <0x00200000  0x001C0000>;
+};
+
+&wifi {
+	status = "disabled";
+};

tests/subsys/sd/sdio/src/main.c

@@ -46,6 +46,32 @@ ZTEST(sd_stack, test_read)
 	zassert_not_equal(reg, 0xFF, "CCCR read returned invalid data");
 }
 
+/*
+ * Verify that a register write works. Given the custom nature of SDIO devices,
+ * we just write to the card common I/O area.
+ */
+ZTEST(sd_stack, test_write)
+{
+	int ret;
+	uint8_t data = 0x01;
+	uint8_t reg = 0xFF;
+	uint8_t new_reg_value = 0xFF;
+
+	/* Read from card common I/O area. */
+	ret = sdio_read_byte(&card.func0, SDIO_CCCR_BUS_IF, &reg);
+	zassert_equal(ret, 0, "SD card read failed");
+
+	/* Write to card common I/O area. */
+	ret = sdio_write_byte(&card.func0, SDIO_CCCR_BUS_IF, data);
+	zassert_equal(ret, 0, "SD card write failed");
+
+	/* Read after write to verify that data was written */
+	ret = sdio_read_byte(&card.func0, SDIO_CCCR_BUS_IF, &new_reg_value);
+	zassert_equal(ret, 0, "SD card read failed");
+	new_reg_value = new_reg_value & SDIO_CCCR_BUS_IF_WIDTH_MASK;
+	zassert_equal(new_reg_value, data, "read data was not as expected");
+}
+
 /* Simply dump the card configuration. */
 ZTEST(sd_stack, test_card_config)
 {