applications: nrf_desktop: Reduce nRF54L05 memory footprint

Switched from speed to size optimizations for nRF54L15 DK (nRF54L05
emulated SoC) and enabled LTO in debug and release configurations
to reduce memory footprint.

Jira: NCSDK-31374

Signed-off-by: Mateusz Kapala <[email protected]>

Author: mkapala-nordic

applications/nrf_desktop/configuration/nrf54l15dk_nrf54l05_cpuapp/prj.conf

@@ -70,7 +70,12 @@ CONFIG_GPIO=y
 
 CONFIG_REBOOT=y
 
-CONFIG_SPEED_OPTIMIZATIONS=y
+# Optimize for size to reduce memory footprint.
+CONFIG_SIZE_OPTIMIZATIONS=y
+
+# Activate LTO
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
 
 CONFIG_PWM=y
 

applications/nrf_desktop/configuration/nrf54l15dk_nrf54l05_cpuapp/prj_release.conf

@@ -72,7 +72,12 @@ CONFIG_USE_SEGGER_RTT=n
 
 CONFIG_REBOOT=y
 
-CONFIG_SPEED_OPTIMIZATIONS=y
+# Optimize for size to reduce memory footprint.
+CONFIG_SIZE_OPTIMIZATIONS=y
+
+# Activate LTO
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
 
 CONFIG_PWM=y
 

applications/nrf_desktop/configuration/nrf54l15dk_nrf54l05_cpuapp/prj_release_fast_pair.conf

@@ -94,6 +94,10 @@ CONFIG_REBOOT=y
 # Optimize for size to reduce memory footprint.
 CONFIG_SIZE_OPTIMIZATIONS=y
 
+# Activate LTO
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
+
 CONFIG_PWM=y
 
 CONFIG_LED=y

applications/nrf_desktop/configuration/nrf54l15dk_nrf54l05_cpuapp/prj_release_keyboard.conf

@@ -79,7 +79,12 @@ CONFIG_USE_SEGGER_RTT=n
 
 CONFIG_REBOOT=y
 
-CONFIG_SPEED_OPTIMIZATIONS=y
+# Optimize for size to reduce memory footprint.
+CONFIG_SIZE_OPTIMIZATIONS=y
+
+# Activate LTO
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
 
 CONFIG_PWM=y