diff --git a/boot/zephyr/boards/nrf52_minimal_footprint.conf b/boot/zephyr/boards/nrf52_minimal_footprint.conf
index a290312be..73fa4f66f 100644
--- a/boot/zephyr/boards/nrf52_minimal_footprint.conf
+++ b/boot/zephyr/boards/nrf52_minimal_footprint.conf
@@ -16,10 +16,6 @@ CONFIG_BOOT_SIGNATURE_KEY_FILE="root-ec-p256.pem"
 # by reliability reason.
 CONFIG_BOOT_UPGRADE_ONLY=y
 
-# CONFIG_BOARD_ENABLE_DCDC is not set
-CONFIG_SOC_SERIES_NRF52X=y
-CONFIG_SOC_NRF52832_QFAA=y
-CONFIG_ARM=y
 CONFIG_ARM_MPU=n
 CONFIG_MAIN_STACK_SIZE=10240
 CONFIG_THREAD_STACK_INFO=n
@@ -27,9 +23,11 @@ CONFIG_THREAD_STACK_INFO=n
 CONFIG_FLASH=y
 
 CONFIG_CONSOLE=n
+CONFIG_UART_CONSOLE=n
 CONFIG_DEBUG=n
 CONFIG_EARLY_CONSOLE=n
 CONFIG_PRINTK=n
+CONFIG_LOG=n
 
 CONFIG_SYS_CLOCK_EXISTS=n
 
@@ -37,7 +35,6 @@ CONFIG_SYS_CLOCK_EXISTS=n
 CONFIG_I2C=n
 CONFIG_WATCHDOG=n
 CONFIG_GPIO=n
-CONFIG_PINMUX=n
 CONFIG_SPI=n
 CONFIG_SERIAL=n
 
@@ -49,13 +46,11 @@ CONFIG_DYNAMIC_INTERRUPTS=n
 CONFIG_IRQ_OFFLOAD=n
 
 # Memory protection
-CONFIG_MEMORY_PROTECTION=n
 CONFIG_THREAD_CUSTOM_DATA=n
 CONFIG_FPU=n
 
 # Boot
 CONFIG_BOOT_BANNER=n
-CONFIG_BOOT_DELAY=0
 
 # Console
 CONFIG_STDOUT_CONSOLE=n
diff --git a/boot/zephyr/boards/nrf54l15dk_nrf54l05_cpuapp.conf b/boot/zephyr/boards/nrf54l15dk_nrf54l05_cpuapp.conf
index f911aa248..c8fcd32c3 100644
--- a/boot/zephyr/boards/nrf54l15dk_nrf54l05_cpuapp.conf
+++ b/boot/zephyr/boards/nrf54l15dk_nrf54l05_cpuapp.conf
@@ -7,8 +7,6 @@ CONFIG_BOOT_MAX_IMG_SECTORS=256
 # Ensure that the SPI NOR driver is disabled by default
 CONFIG_SPI_NOR=n
 
-CONFIG_FPROTECT=y
-
 CONFIG_BOOT_WATCHDOG_FEED=n
 
 # Ensure the fastest RRAM write operations
diff --git a/boot/zephyr/boards/nrf54l15dk_nrf54l10_cpuapp.conf b/boot/zephyr/boards/nrf54l15dk_nrf54l10_cpuapp.conf
index f911aa248..c8fcd32c3 100644
--- a/boot/zephyr/boards/nrf54l15dk_nrf54l10_cpuapp.conf
+++ b/boot/zephyr/boards/nrf54l15dk_nrf54l10_cpuapp.conf
@@ -7,8 +7,6 @@ CONFIG_BOOT_MAX_IMG_SECTORS=256
 # Ensure that the SPI NOR driver is disabled by default
 CONFIG_SPI_NOR=n
 
-CONFIG_FPROTECT=y
-
 CONFIG_BOOT_WATCHDOG_FEED=n
 
 # Ensure the fastest RRAM write operations
diff --git a/boot/zephyr/main.c b/boot/zephyr/main.c
index f19c609c1..3e85e7043 100644
--- a/boot/zephyr/main.c
+++ b/boot/zephyr/main.c
@@ -90,22 +90,8 @@ const struct boot_uart_funcs boot_funcs = {
 #include <arm_cleanup.h>
 #endif
 
-/* CONFIG_LOG_MINIMAL is the legacy Kconfig property,
- * replaced by CONFIG_LOG_MODE_MINIMAL.
- */
-#if (defined(CONFIG_LOG_MODE_MINIMAL) || defined(CONFIG_LOG_MINIMAL))
-#define ZEPHYR_LOG_MODE_MINIMAL 1
-#endif
-
-/* CONFIG_LOG_IMMEDIATE is the legacy Kconfig property,
- * replaced by CONFIG_LOG_MODE_IMMEDIATE.
- */
-#if (defined(CONFIG_LOG_MODE_IMMEDIATE) || defined(CONFIG_LOG_IMMEDIATE))
-#define ZEPHYR_LOG_MODE_IMMEDIATE 1
-#endif
-
-#if defined(CONFIG_LOG) && !defined(ZEPHYR_LOG_MODE_IMMEDIATE) && \
-    !defined(ZEPHYR_LOG_MODE_MINIMAL)
+#if defined(CONFIG_LOG) && !defined(CONFIG_LOG_MODE_IMMEDIATE) && \
+    !defined(CONFIG_LOG_MODE_MINIMAL)
 #ifdef CONFIG_LOG_PROCESS_THREAD
 #warning "The log internal thread for log processing can't transfer the log"\
          "well for MCUBoot."
@@ -128,8 +114,8 @@ K_SEM_DEFINE(boot_log_sem, 1, 1);
 /* synchronous log mode doesn't need to be initalized by the application */
 #define ZEPHYR_BOOT_LOG_START() do { } while (false)
 #define ZEPHYR_BOOT_LOG_STOP() do { } while (false)
-#endif /* defined(CONFIG_LOG) && !defined(ZEPHYR_LOG_MODE_IMMEDIATE) && \
-        * !defined(ZEPHYR_LOG_MODE_MINIMAL)
+#endif /* defined(CONFIG_LOG) && !defined(CONFIG_LOG_MODE_IMMEDIATE) && \
+        * !defined(CONFIG_LOG_MODE_MINIMAL)
 	*/
 
 BOOT_LOG_MODULE_REGISTER(mcuboot);
@@ -427,8 +413,8 @@ static void do_boot(struct boot_rsp *rsp)
 }
 #endif
 
-#if defined(CONFIG_LOG) && !defined(ZEPHYR_LOG_MODE_IMMEDIATE) && \
-    !defined(CONFIG_LOG_PROCESS_THREAD) && !defined(ZEPHYR_LOG_MODE_MINIMAL)
+#if defined(CONFIG_LOG) && !defined(CONFIG_LOG_MODE_IMMEDIATE) && \
+    !defined(CONFIG_LOG_PROCESS_THREAD) && !defined(CONFIG_LOG_MODE_MINIMAL)
 /* The log internal thread for log processing can't transfer log well as has too
  * low priority.
  * Dedicated thread for log processing below uses highest application
@@ -446,12 +432,7 @@ void boot_log_thread_func(void *dummy1, void *dummy2, void *dummy3)
     log_init();
 
     while (1) {
-#if defined(CONFIG_LOG1) || defined(CONFIG_LOG2)
-        /* support Zephyr legacy logging implementation before commit c5f2cde */
-        if (log_process(false) == false) {
-#else
         if (log_process() == false) {
-#endif
             if (boot_log_stop) {
                 break;
             }
@@ -485,8 +466,8 @@ void zephyr_boot_log_stop(void)
      */
     (void)k_sem_take(&boot_log_sem, K_FOREVER);
 }
-#endif /* defined(CONFIG_LOG) && !defined(ZEPHYR_LOG_MODE_IMMEDIATE) && \
-        * !defined(CONFIG_LOG_PROCESS_THREAD) && !defined(ZEPHYR_LOG_MODE_MINIMAL)
+#endif /* defined(CONFIG_LOG) && !defined(CONFIG_LOG_MODE_IMMEDIATE) && \
+        * !defined(CONFIG_LOG_PROCESS_THREAD) && !defined(CONFIG_LOG_MODE_MINIMAL)
         */
 
 #if defined(CONFIG_BOOT_SERIAL_ENTRANCE_GPIO) || defined(CONFIG_BOOT_SERIAL_PIN_RESET) \
diff --git a/boot/zephyr/prj.conf b/boot/zephyr/prj.conf
index a82767187..aeed83a1e 100644
--- a/boot/zephyr/prj.conf
+++ b/boot/zephyr/prj.conf
@@ -19,7 +19,7 @@ CONFIG_FLASH=y
 # CONFIG_I2C is not set
 
 CONFIG_LOG=y
-CONFIG_LOG_MODE_MINIMAL=y # former CONFIG_MODE_MINIMAL
+CONFIG_LOG_MODE_MINIMAL=y
 ### Ensure Zephyr logging changes don't use more resources
 CONFIG_LOG_DEFAULT_LEVEL=0
 ### Use info log level by default