From 75295df810fbe15a4d7d9846e61c1ad136d5a492 Mon Sep 17 00:00:00 2001
From: Jue <me@jue.yt>
Date: Fri, 28 Oct 2022 18:26:13 +0200
Subject: [PATCH] cpu/saml21/pm: allow blocking IDLE mode

---
 cpu/saml21/periph/pm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpu/saml21/periph/pm.c b/cpu/saml21/periph/pm.c
index e4b557af44..26443e8346 100644
--- a/cpu/saml21/periph/pm.c
+++ b/cpu/saml21/periph/pm.c
@@ -40,7 +40,6 @@ void pm_set(unsigned mode)
             _mode = PM_SLEEPCFG_SLEEPMODE_STANDBY;
             deep  = 1;
             break;
-        default: /* Falls through */
         case SAML21_PM_MODE_IDLE:
             DEBUG_PUTS("pm_set(): setting IDLE mode.");
 #if !defined(PM_SLEEPCFG_SLEEPMODE_IDLE2)
@@ -49,6 +48,9 @@ void pm_set(unsigned mode)
             _mode = PM_SLEEPCFG_SLEEPMODE_IDLE2;
 #endif
             break;
+        default:
+            /* don't sleep at all */
+            return;
     }
 
     /* write sleep configuration */