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-rw-r--r--keyboards/at_at/660m/chconf.h4
-rw-r--r--keyboards/at_at/660m/rules.mk3
2 files changed, 3 insertions, 4 deletions
diff --git a/keyboards/at_at/660m/chconf.h b/keyboards/at_at/660m/chconf.h
index 99fa8ce398..89388dd5a3 100644
--- a/keyboards/at_at/660m/chconf.h
+++ b/keyboards/at_at/660m/chconf.h
@@ -105,10 +105,6 @@
*/
#define CH_CFG_NO_IDLE_THREAD FALSE
-/* Use __WFI in the idle thread for waiting. Does lower the power
- * consumption. */
-#define CORTEX_ENABLE_WFI_IDLE TRUE
-
/** @} */
/*===========================================================================*/
diff --git a/keyboards/at_at/660m/rules.mk b/keyboards/at_at/660m/rules.mk
index b893d8031b..0b3685f09e 100644
--- a/keyboards/at_at/660m/rules.mk
+++ b/keyboards/at_at/660m/rules.mk
@@ -17,3 +17,6 @@ CUSTOM_MATRIX = no # Custom matrix file
# RGBLIGHT_ENABLE = yes
NO_USB_STARTUP_CHECK = yes # Workaround for issue 6369
+
+# Enter lower-power sleep mode when on the ChibiOS idle thread
+OPT_DEFS += -DCORTEX_ENABLE_WFI_IDLE=TRUE