diff --git a/samples/drivers/soc_flash_nrf5/prj.conf b/samples/drivers/soc_flash_nrf5/prj.conf
index ddba4985063..2b15c897a54 100644
--- a/samples/drivers/soc_flash_nrf5/prj.conf
+++ b/samples/drivers/soc_flash_nrf5/prj.conf
@@ -1,4 +1,3 @@
 CONFIG_STDOUT_CONSOLE=y
 CONFIG_FLASH=y
 CONFIG_SOC_FLASH_NRF5=y
-CONFIG_SYS_LOG=y
diff --git a/samples/drivers/soc_flash_nrf5/src/main.c b/samples/drivers/soc_flash_nrf5/src/main.c
index 5ea51148f21..377d3665795 100644
--- a/samples/drivers/soc_flash_nrf5/src/main.c
+++ b/samples/drivers/soc_flash_nrf5/src/main.c
@@ -18,9 +18,13 @@
 #include <zephyr.h>
 #include <flash.h>
 #include <device.h>
-
-#define SYS_LOG_LEVEL SYS_LOG_LEVEL_INFO
-#include <misc/sys_log.h>
+#if defined(CONFIG_STDOUT_CONSOLE)
+#include <stdio.h>
+#define PRINT           printf
+#else
+#include <misc/printk.h>
+#define PRINT           printk
+#endif
 
 /* Offset between pages */
 #define FLASH_TEST_OFFSET 0x40000
@@ -41,83 +45,79 @@ void main(void)
 	uint32_t buf_word = 0;
 	uint32_t i, offset;
 
-	SYS_LOG_INF("\nNordic nRF5 Flash Testing");
-	SYS_LOG_INF("=========================");
+	PRINT("\nNordic nRF5 Flash Testing\n");
+	PRINT("=========================\n");
 
 	flash_dev = device_get_binding("NRF5_FLASH");
 
 	if (!flash_dev) {
-		SYS_LOG_ERR("Nordic nRF5 flash driver was not found!");
+		PRINT("Nordic nRF5 flash driver was not found!\n");
 		return;
 	}
 
-	SYS_LOG_INF("\nTest 1: Flash erase page at 0x%x", FLASH_TEST_OFFSET);
+	PRINT("\nTest 1: Flash erase page at 0x%x\n", FLASH_TEST_OFFSET);
 	if (flash_erase(flash_dev, FLASH_TEST_OFFSET, FLASH_PAGE_SIZE) != 0) {
-		SYS_LOG_INF("   Flash erase failed!");
+		PRINT("   Flash erase failed!\n");
 	} else {
-		SYS_LOG_INF("   Flash erase succeeded!");
+		PRINT("   Flash erase succeeded!\n");
 	}
 
-	SYS_LOG_INF("\nTest 2: Flash write (word array 1)");
+	PRINT("\nTest 2: Flash write (word array 1)\n");
 	flash_write_protection_set(flash_dev, false);
 	for (i = 0; i < TEST_DATA_LEN; i++) {
 		offset = FLASH_TEST_OFFSET + (i << 2);
-		SYS_LOG_INF("   Attempted to write %x at 0x%x",
-			    buf_array_1[i], offset);
+		PRINT("   Attempted to write %x at 0x%x\n", buf_array_1[i],
+				offset);
 		if (flash_write(flash_dev, offset, &buf_array_1[i],
 					TEST_DATA_LEN) != 0) {
-			SYS_LOG_INF("   Flash write failed!");
+			PRINT("   Flash write failed!\n");
 			return;
 		}
-		SYS_LOG_INF("   Attempted to read 0x%x", offset);
+		PRINT("   Attempted to read 0x%x\n", offset);
 		if (flash_read(flash_dev, offset, &buf_word,
 					TEST_DATA_LEN) != 0) {
-			SYS_LOG_INF("   Flash read failed!");
+			PRINT("   Flash read failed!\n");
 			return;
 		}
-		SYS_LOG_INF("   Data read: %x", buf_word);
+		PRINT("   Data read: %x\n", buf_word);
 		if (buf_array_1[i] == buf_word) {
-			SYS_LOG_INF("   Data read matches data written. "
-				    "Good!");
+			PRINT("   Data read matches data written. Good!\n");
 		} else {
-			SYS_LOG_INF("   Data read does not match data "
-				    "written!");
+			PRINT("   Data read does not match data written!\n");
 		}
 	}
 	flash_write_protection_set(flash_dev, true);
 
 	offset = FLASH_TEST_OFFSET - FLASH_PAGE_SIZE * 2;
-	SYS_LOG_INF("\nTest 3: Flash erase (4 pages at 0x%x)", offset);
+	PRINT("\nTest 3: Flash erase (4 pages at 0x%x)\n", offset);
 	if (flash_erase(flash_dev, offset, FLASH_PAGE_SIZE * 4) != 0) {
-		SYS_LOG_INF("   Flash erase failed!");
+		PRINT("   Flash erase failed!\n");
 	} else {
-		SYS_LOG_INF("   Flash erase succeeded!");
+		PRINT("   Flash erase succeeded!\n");
 	}
 
-	SYS_LOG_INF("\nTest 4: Flash write (word array 2)");
+	PRINT("\nTest 4: Flash write (word array 2)\n");
 	flash_write_protection_set(flash_dev, false);
 	for (i = 0; i < TEST_DATA_LEN; i++) {
 		offset = FLASH_TEST_OFFSET + (i << 2);
-		SYS_LOG_INF("   Attempted to write %x at 0x%x",
-			    buf_array_2[i], offset);
+		PRINT("   Attempted to write %x at 0x%x\n", buf_array_2[i],
+				offset);
 		if (flash_write(flash_dev, offset, &buf_array_2[i],
 					TEST_DATA_LEN) != 0) {
-			SYS_LOG_INF("   Flash write failed!");
+			PRINT("   Flash write failed!\n");
 			return;
 		}
-		SYS_LOG_INF("   Attempted to read 0x%x", offset);
+		PRINT("   Attempted to read 0x%x\n", offset);
 		if (flash_read(flash_dev, offset, &buf_word,
 					TEST_DATA_LEN) != 0) {
-			SYS_LOG_INF("   Flash read failed!");
+			PRINT("   Flash read failed!\n");
 			return;
 		}
-		SYS_LOG_INF("   Data read: %x", buf_word);
+		PRINT("   Data read: %x\n", buf_word);
 		if (buf_array_2[i] == buf_word) {
-			SYS_LOG_INF("   Data read matches data written. "
-				    "Good!");
+			PRINT("   Data read matches data written. Good!\n");
 		} else {
-			SYS_LOG_INF("   Data read does not match data "
-				    "written!");
+			PRINT("   Data read does not match data written!\n");
 		}
 	}
 	flash_write_protection_set(flash_dev, true);
diff --git a/samples/drivers/spi_flash/prj.conf b/samples/drivers/spi_flash/prj.conf
index 5a5597b05bb..9f1a32ff484 100644
--- a/samples/drivers/spi_flash/prj.conf
+++ b/samples/drivers/spi_flash/prj.conf
@@ -4,4 +4,3 @@ CONFIG_SPI=y
 CONFIG_GPIO=y
 CONFIG_SPI_CS_GPIO=y
 CONFIG_SPI_0_CS_GPIO_PIN=24
-CONFIG_SYS_LOG=y
diff --git a/samples/drivers/spi_flash/src/main.c b/samples/drivers/spi_flash/src/main.c
index 737daee21bc..87124831005 100644
--- a/samples/drivers/spi_flash/src/main.c
+++ b/samples/drivers/spi_flash/src/main.c
@@ -17,8 +17,13 @@
 #include <zephyr.h>
 #include <flash.h>
 #include <device.h>
-#define SYS_LOG_LEVEL SYS_LOG_LEVEL_INFO
-#include <misc/sys_log.h>
+#if defined(CONFIG_STDOUT_CONSOLE)
+#include <stdio.h>
+#define PRINT           printf
+#else
+#include <misc/printk.h>
+#define PRINT           printk
+#endif
 
 #define FLASH_TEST_REGION_OFFSET 0xff000
 #define FLASH_SECTOR_SIZE        4096
@@ -31,13 +36,13 @@ void main(void)
 	struct device *flash_dev;
 	uint8_t buf[TEST_DATA_LEN];
 
-	SYS_LOG_INF("\nW25QXXDV SPI flash testing");
-	SYS_LOG_INF("==========================");
+	PRINT("\nW25QXXDV SPI flash testing\n");
+	PRINT("==========================\n");
 
 	flash_dev = device_get_binding("W25QXXDV");
 
 	if (!flash_dev) {
-		SYS_LOG_ERR("SPI flash driver was not found!");
+		PRINT("SPI flash driver was not found!\n");
 		return;
 	}
 
@@ -46,39 +51,38 @@ void main(void)
 	 * on write protection automatically after completion of write and
 	 * erase operations.
 	 */
-	SYS_LOG_INF("\nTest 1: Flash erase");
+	PRINT("\nTest 1: Flash erase\n");
 	flash_write_protection_set(flash_dev, false);
 	if (flash_erase(flash_dev,
 			FLASH_TEST_REGION_OFFSET,
 			FLASH_SECTOR_SIZE) != 0) {
-		SYS_LOG_INF("   Flash erase failed!");
+		PRINT("   Flash erase failed!\n");
 	} else {
-		SYS_LOG_INF("   Flash erase succeeded!");
+		PRINT("   Flash erase succeeded!\n");
 	}
 
-	SYS_LOG_INF("\nTest 2: Flash write");
+	PRINT("\nTest 2: Flash write\n");
 	flash_write_protection_set(flash_dev, false);
 
 	buf[0] = TEST_DATA_BYTE_0;
 	buf[1] = TEST_DATA_BYTE_1;
-	SYS_LOG_INF("   Attempted to write %x %x", buf[0], buf[1]);
+	PRINT("   Attempted to write %x %x\n", buf[0], buf[1]);
 	if (flash_write(flash_dev, FLASH_TEST_REGION_OFFSET, buf,
 	    TEST_DATA_LEN) != 0) {
-		SYS_LOG_INF("   Flash write failed!");
+		PRINT("   Flash write failed!\n");
 		return;
 	}
 
 	if (flash_read(flash_dev, FLASH_TEST_REGION_OFFSET, buf,
 	    TEST_DATA_LEN) != 0) {
-		SYS_LOG_INF("   Flash read failed!");
+		PRINT("   Flash read failed!\n");
 		return;
 	}
-	SYS_LOG_INF("   Data read %x %x", buf[0], buf[1]);
+	PRINT("   Data read %x %x\n", buf[0], buf[1]);
 
 	if ((buf[0] == TEST_DATA_BYTE_0) && (buf[1] == TEST_DATA_BYTE_1)) {
-		SYS_LOG_INF("   Data read matches with data written. Good!!");
+		PRINT("   Data read matches with data written. Good!!\n");
 	} else {
-		SYS_LOG_INF("   Data read does not match with data "
-			    "written!!");
+		PRINT("   Data read does not match with data written!!\n");
 	}
 }