From 363fd8ab9800d46baec949c2baa6271df5e6dccc Mon Sep 17 00:00:00 2001
From: mverch67 <manuel.verch@gmx.de>
Date: Fri, 27 Sep 2024 15:14:22 +0200
Subject: [PATCH] fix GPIO0 mode after I2S audio

---
 src/modules/ExternalNotificationModule.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/modules/ExternalNotificationModule.cpp b/src/modules/ExternalNotificationModule.cpp
index 8abc386ec..2306119b1 100644
--- a/src/modules/ExternalNotificationModule.cpp
+++ b/src/modules/ExternalNotificationModule.cpp
@@ -98,6 +98,13 @@ int32_t ExternalNotificationModule::runOnce()
                 LOG_INFO("%d ", i);
             }
             LOG_INFO("\n");
+#ifdef HAS_I2S
+            // GPIO0 is used as mclk for I2S audio and set to OUTPUT by the sound library
+            // T-Deck uses GPIO0 as trackball button, so restore the mode
+#if defined(T_DECK) || (defined(BUTTON_PIN) && BUTTON_PIN == 0)
+            pinMode(0, INPUT);
+#endif
+#endif
             isNagging = false;
             return INT32_MAX; // save cycles till we're needed again
         }