From e2c35ca35b09d293904714dd3ed528dec7deccc8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alberto=20Garci=CC=81a=20Hierro?= <alberto@frsky-rc.com>
Date: Wed, 21 Apr 2021 22:01:14 +0100
Subject: [PATCH] Enable IO20 on ESP32

Some newer ESP32 variants (like ESP32-PICO-V3 and ESP32-PICO-MINI-02)
do implement this pin and it can be used as a normal GPIO.

Fixes #6016
Fixes #6837

Closes https://github.com/espressif/esp-idf/pull/6918

(cherry picked from commit 6deaefde69c3f068d39b76d628b05b21fd142b79)
---
 components/soc/soc/esp32/gpio_periph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/soc/soc/esp32/gpio_periph.c b/components/soc/soc/esp32/gpio_periph.c
index d8a30b0af50..0a6eee285ad 100644
--- a/components/soc/soc/esp32/gpio_periph.c
+++ b/components/soc/soc/esp32/gpio_periph.c
@@ -35,7 +35,7 @@ const uint32_t GPIO_PIN_MUX_REG[GPIO_PIN_COUNT] = {
     IO_MUX_GPIO17_REG,
     IO_MUX_GPIO18_REG,
     IO_MUX_GPIO19_REG,
-    0,
+    IO_MUX_GPIO20_REG,
     IO_MUX_GPIO21_REG,
     IO_MUX_GPIO22_REG,
     IO_MUX_GPIO23_REG,