From cc13b0ea058e81d8f893d4883bd6818ba36b7f2c Mon Sep 17 00:00:00 2001
From: Wangjialin <wangjialin@espressif.com>
Date: Tue, 24 Jan 2017 12:32:30 +0800
Subject: [PATCH] deep sleep: allow wakeup from touch sensor interrupt

---
 components/esp32/deep_sleep.c             | 6 ++++++
 components/esp32/include/esp_deep_sleep.h | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/components/esp32/deep_sleep.c b/components/esp32/deep_sleep.c
index 4d672402e..1c2b60361 100644
--- a/components/esp32/deep_sleep.c
+++ b/components/esp32/deep_sleep.c
@@ -177,6 +177,12 @@ esp_err_t esp_deep_sleep_enable_timer_wakeup(uint64_t time_in_us)
     return ESP_OK;
 }
 
+esp_err_t esp_deep_sleep_enable_touchpad_wakeup()
+{
+    s_config.wakeup_triggers |= TOUCH_TRIG_EN;
+    return ESP_OK;
+}
+
 esp_err_t esp_deep_sleep_enable_ext0_wakeup(gpio_num_t gpio_num, int level)
 {
     if (level < 0 || level > 1) {
diff --git a/components/esp32/include/esp_deep_sleep.h b/components/esp32/include/esp_deep_sleep.h
index aba74b30d..fda075eb2 100644
--- a/components/esp32/include/esp_deep_sleep.h
+++ b/components/esp32/include/esp_deep_sleep.h
@@ -68,6 +68,13 @@ esp_err_t esp_deep_sleep_enable_ulp_wakeup();
  */
 esp_err_t esp_deep_sleep_enable_timer_wakeup(uint64_t time_in_us);
 
+/**
+ * @brief Enable wakeup by touch sensor
+ * @return
+ *      - ESP_OK on success
+ */
+esp_err_t esp_deep_sleep_enable_touchpad_wakeup();
+
 /**
  * @brief Enable wakeup using a pin
  *