From 9c6c32cc510dd01f5e37a4e03c403718fe51c98a Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Thu, 6 Dec 2018 17:03:44 +1100
Subject: [PATCH] esp32/machine_pwm: On deinit stop routing PWM signal to the
 pin.

Fixes issue #4273.
---
 ports/esp32/machine_pwm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ports/esp32/machine_pwm.c b/ports/esp32/machine_pwm.c
index 4833c1f02..7376470dc 100644
--- a/ports/esp32/machine_pwm.c
+++ b/ports/esp32/machine_pwm.c
@@ -234,6 +234,7 @@ STATIC mp_obj_t esp32_pwm_deinit(mp_obj_t self_in) {
         ledc_stop(PWMODE, chan, 0);
         self->active = 0;
         self->channel = -1;
+        gpio_matrix_out(self->pin, SIG_GPIO_OUT_IDX, false, false);
     }
     return mp_const_none;
 }