logging: backends: improve log backend Kconfig dependencies

anhmolt · eivindj-nordic · commit 5b34d1bda2d0 · 2025-09-24T10:45:42.000+02:00
Disabling CONFIG_LOG while having CONFIG_LOG_BACKEND_BM_UARTE enabled
in the samples caused a build error. Rework the Bare Metal logging
backend dependencies to better align with the zephyr logging Kconfigs.

Signed-off-by: Andreas Moltumyr &lt;andreas.moltumyr@nordicsemi.no&gt;
diff --git a/subsys/logging/Kconfig b/subsys/logging/Kconfig
@@ -5,10 +5,18 @@
 #
 menu "Logging"
 
+if LOG
+
 if !LOG_MODE_MINIMAL
 
+if !LOG_FRONTEND_ONLY
+
 rsource "backends/Kconfig"
 
-endif
+endif # !LOG_FRONTEND_ONLY
+
+endif # !LOG_MODE_MINIMAL
+
+endif # LOG
 
 endmenu
diff --git a/subsys/logging/backends/Kconfig b/subsys/logging/backends/Kconfig
@@ -8,4 +8,9 @@ menu "Backends"
 
 rsource "Kconfig.bm_uarte"
 
+# Disable the zephyr UART backend by default when the Bare Metal UARTE log backend is used.
+config LOG_BACKEND_UART
+	depends on UART_CONSOLE
+	default n if LOG_BACKEND_BM_UARTE
+
 endmenu
diff --git a/subsys/logging/backends/Kconfig.bm_uarte b/subsys/logging/backends/Kconfig.bm_uarte
@@ -5,7 +5,7 @@
 #
 
 menuconfig LOG_BACKEND_BM_UARTE
-	bool "UARTE log backend"
+	bool "Bare Metal UARTE backend"
 	select LOG_BACKEND_SUPPORTS_FORMAT_TIMESTAMP
 	help
 	  When enabled, the backend uses the nrfx UARTE driver to output logs and printk.

Original file line number	Diff line number	Diff line change
`@@ -5,7 +5,7 @@`
`5`	`5`	`#`
`6`	`6`
`7`	`7`	`menuconfig LOG_BACKEND_BM_UARTE`
`8`		`- bool "UARTE log backend"`
	`8`	`+ bool "Bare Metal UARTE backend"`
`9`	`9`	`select LOG_BACKEND_SUPPORTS_FORMAT_TIMESTAMP`
`10`	`10`	`help`
`11`	`11`	`When enabled, the backend uses the nrfx UARTE driver to output logs and printk.`