From 65eafd16b5328a42a8ec6bcaa8aaf26f0ad9729f Mon Sep 17 00:00:00 2001
From: Rodrigo Garcia <rodrigo.garcia@espressif.com>
Date: Mon, 26 Jul 2021 14:37:44 -0300
Subject: [PATCH] Fixes ESP32-S2 LEDC PWM #5375 #5050 (#5452)

Fixes: #5375
Fixes: #5050
---
 cores/esp32/esp32-hal-ledc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cores/esp32/esp32-hal-ledc.c b/cores/esp32/esp32-hal-ledc.c
index 5881b400..102e5bbb 100644
--- a/cores/esp32/esp32-hal-ledc.c
+++ b/cores/esp32/esp32-hal-ledc.c
@@ -115,6 +115,10 @@ static void _ledcSetupTimer(uint8_t chan, uint32_t div_num, uint8_t bit_num, boo
     uint8_t group=(chan/8), timer=((chan/2)%4);
     static bool tHasStarted = false;
     static uint16_t _activeChannels = 0;
+#if CONFIG_IDF_TARGET_ESP32S2
+// ESP32-S2 TRM v1.0 on Page 789 -> BIT LEDC_TICK_SEL_TIMERx is 0 for LEDC_PWM_CLK and 1 for REF_TICK
+    apb_clk = 0;        
+#endif
     if(!tHasStarted) {
         tHasStarted = true;
         periph_module_enable(PERIPH_LEDC_MODULE);