diff --git a/samples/drivers/spi_flash/boards/adafruit_feather_nrf52840_sense.conf b/samples/drivers/spi_flash/boards/adafruit_feather_nrf52840_sense.conf
deleted file mode 100644
index d9add33645a..00000000000
--- a/samples/drivers/spi_flash/boards/adafruit_feather_nrf52840_sense.conf
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Copyright (c) 2020 Teslabs Engineering S.L.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_NORDIC_QSPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/em_starterkit_emsk_em9d.conf b/samples/drivers/spi_flash/boards/em_starterkit_emsk_em9d.conf
deleted file mode 100644
index 4e3bfcd17d5..00000000000
--- a/samples/drivers/spi_flash/boards/em_starterkit_emsk_em9d.conf
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Copyright (c) 2023 Synopsys.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_SPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/emsdp_emsdp_em11d.conf b/samples/drivers/spi_flash/boards/emsdp_emsdp_em11d.conf
deleted file mode 100644
index 4e3bfcd17d5..00000000000
--- a/samples/drivers/spi_flash/boards/emsdp_emsdp_em11d.conf
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Copyright (c) 2023 Synopsys.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_SPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/mec172xevb_assy6906.conf b/samples/drivers/spi_flash/boards/mec172xevb_assy6906.conf
deleted file mode 100644
index 38f06a0c0f8..00000000000
--- a/samples/drivers/spi_flash/boards/mec172xevb_assy6906.conf
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Copyright (c) 2022 Microchip Technology Inc.
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_SPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/nrf52840_mdk.conf b/samples/drivers/spi_flash/boards/nrf52840_mdk.conf
deleted file mode 100644
index c17e6e08b39..00000000000
--- a/samples/drivers/spi_flash/boards/nrf52840_mdk.conf
+++ /dev/null
@@ -1,8 +0,0 @@
-#
-# Copyright (c) 2020 Stephane D'Alu
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_SPI=n
-CONFIG_NORDIC_QSPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/nrf52840dk_nrf52840.conf b/samples/drivers/spi_flash/boards/nrf52840dk_nrf52840.conf
deleted file mode 100644
index c483efdb826..00000000000
--- a/samples/drivers/spi_flash/boards/nrf52840dk_nrf52840.conf
+++ /dev/null
@@ -1,8 +0,0 @@
-#
-# Copyright (c) 2019 Peter Bigot Consulting, LLC
-# Copyright (c) 2019 Nordic Semiconductor ASA
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_NORDIC_QSPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/nrf5340dk_nrf5340_cpuapp.conf b/samples/drivers/spi_flash/boards/nrf5340dk_nrf5340_cpuapp.conf
deleted file mode 100644
index 10239a8fd1b..00000000000
--- a/samples/drivers/spi_flash/boards/nrf5340dk_nrf5340_cpuapp.conf
+++ /dev/null
@@ -1,8 +0,0 @@
-#
-# Copyright (c) 2020 Nordic Semiconductor ASA
-#
-# SPDX-License-Identifier: Apache-2.0
-#
-
-CONFIG_SPI=n
-CONFIG_NORDIC_QSPI_NOR=y
diff --git a/samples/drivers/spi_flash/boards/stm32h735g_disco.conf b/samples/drivers/spi_flash/boards/stm32h735g_disco.conf
deleted file mode 100644
index d073f9492d8..00000000000
--- a/samples/drivers/spi_flash/boards/stm32h735g_disco.conf
+++ /dev/null
@@ -1 +0,0 @@
-CONFIG_SPI=n
diff --git a/samples/drivers/spi_flash/boards/stm32h7b3i_dk.conf b/samples/drivers/spi_flash/boards/stm32h7b3i_dk.conf
deleted file mode 100644
index d073f9492d8..00000000000
--- a/samples/drivers/spi_flash/boards/stm32h7b3i_dk.conf
+++ /dev/null
@@ -1 +0,0 @@
-CONFIG_SPI=n
diff --git a/samples/drivers/spi_flash/prj.conf b/samples/drivers/spi_flash/prj.conf
index c5beb21553a..d78e334e0fb 100644
--- a/samples/drivers/spi_flash/prj.conf
+++ b/samples/drivers/spi_flash/prj.conf
@@ -1,3 +1,2 @@
 CONFIG_STDOUT_CONSOLE=y
 CONFIG_FLASH=y
-CONFIG_SPI=y