soc/rtc: fix RTC_TOUCH_TRIG_EN or RTC_ULP_TRIG_EN should keep RTC_PERIPH power on

diff --git a/components/esp32/Kconfig b/components/esp32/Kconfig
index edfea9c5a49c185e4cfca16ac7ae8bd1a82c964a..902f062af290093f77544ec93d9eeb8547608e43 100644 (file)
--- a/components/esp32/Kconfig
+++ b/components/esp32/Kconfig
@@ -786,6 +786,18 @@ config ESP32_RTC_CLK_CAL_CYCLES
           In case more value will help improve the definition of the launch of the crystal.
           If the crystal could not start, it will be switched to internal RC.
 
+config ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+    bool "Additional current for external 32kHz crystal"
+    depends on ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL
+    default "n"
+    help
+        Choose which additional current is used for rtc external crystal.
+
+        - "Enable current by touch" option provides touch pad9 current to
+           external 32kHz crystal, at the expense of slightly higher (4-5uA) deep
+           sleep current consumption. Note that enabled Touch or ULP wakeup
+           source at sleep, this item is invalid even selected ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT.
+
 config ESP32_RTC_XTAL_BOOTSTRAP_CYCLES
     int "Bootstrap cycles for external 32kHz crystal"
     depends on ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL

diff --git a/components/esp32/include/esp_sleep.h b/components/esp32/include/esp_sleep.h
index 6ebe79ce35ab0170a25c789cc4aa859befde4cde..c21f26add514aaf08f8f40d558c089a2fa4fd532 100644 (file)
--- a/components/esp32/include/esp_sleep.h
+++ b/components/esp32/include/esp_sleep.h
@@ -95,6 +95,7 @@ esp_err_t esp_sleep_disable_wakeup_source(esp_sleep_source_t source);
  *       source is used.
  * @return
  *      - ESP_OK on success
+ *      - ESP_ERR_NOT_SUPPORTED if additional current by touch (CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT) is enabled.
  *      - ESP_ERR_INVALID_STATE if ULP co-processor is not enabled or if wakeup triggers conflict
  */
 esp_err_t esp_sleep_enable_ulp_wakeup();
@@ -121,6 +122,7 @@ esp_err_t esp_sleep_enable_timer_wakeup(uint64_t time_in_us);
  *
  * @return
  *      - ESP_OK on success
+ *      - ESP_ERR_NOT_SUPPORTED if additional current by touch (CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT) is enabled.
  *      - ESP_ERR_INVALID_STATE if wakeup triggers conflict
  */
 esp_err_t esp_sleep_enable_touchpad_wakeup();

diff --git a/components/esp32/sleep_modes.c b/components/esp32/sleep_modes.c
index f3bd071f3ff5e573b499a91c33e0e979b0c8dd28..98a884761862d88ace49fabd833110dbb7634267 100644 (file)
--- a/components/esp32/sleep_modes.c
+++ b/components/esp32/sleep_modes.c
@@ -401,6 +401,9 @@ esp_err_t esp_sleep_disable_wakeup_source(esp_sleep_source_t source)
 
 esp_err_t esp_sleep_enable_ulp_wakeup()
 {
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+    return ESP_ERR_NOT_SUPPORTED;
+#endif
 #ifdef CONFIG_ULP_COPROC_ENABLED
     if(s_config.wakeup_triggers & RTC_EXT0_TRIG_EN) {
         ESP_LOGE(TAG, "Conflicting wake-up trigger: ext0");
@@ -434,6 +437,9 @@ static void timer_wakeup_prepare()
 
 esp_err_t esp_sleep_enable_touchpad_wakeup()
 {
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+    return ESP_ERR_NOT_SUPPORTED;
+#endif
     if (s_config.wakeup_triggers & (RTC_EXT0_TRIG_EN)) {
         ESP_LOGE(TAG, "Conflicting wake-up trigger: ext0");
         return ESP_ERR_INVALID_STATE;
@@ -693,6 +699,13 @@ static uint32_t get_power_down_flags()
     if (s_config.pd_options[ESP_PD_DOMAIN_XTAL] != ESP_PD_OPTION_ON) {
         pd_flags |= RTC_SLEEP_PD_XTAL;
     }
+
+    if ((s_config.wakeup_triggers & (RTC_TOUCH_TRIG_EN | RTC_ULP_TRIG_EN)) == 0) {
+    // If enabled EXT1 only and enable the additional current by touch, should be keep RTC_PERIPH power on.
+#if ((defined CONFIG_ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL) && (defined CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT))
+    pd_flags &= ~RTC_SLEEP_PD_RTC_PERIPH;
+#endif
+    }
     return pd_flags;
 }
 

diff --git a/components/soc/esp32/rtc_clk.c b/components/soc/esp32/rtc_clk.c
index dfe332fa1303d7df3df0402928680fa9c4def7a0..e0e241aaf310dd242452e59853843bb3cced7d89 100644 (file)
--- a/components/soc/esp32/rtc_clk.c
+++ b/components/soc/esp32/rtc_clk.c
@@ -124,7 +124,8 @@ static void rtc_clk_32k_enable_common(int dac, int dres, int dbias)
     REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DRES_XTAL_32K, dres);
     REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DBIAS_XTAL_32K, dbias);
 
-    /* TOUCH sensor can provide additional current to external XTAL. 
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+    /* TOUCH sensor can provide additional current to external XTAL.
        In some case, X32N and X32P PAD don't have enough drive capability to start XTAL */
     SET_PERI_REG_MASK(RTC_IO_TOUCH_CFG_REG, RTC_IO_TOUCH_XPD_BIAS_M);
     /* Tie PAD Touch8 to VDD
@@ -137,6 +138,7 @@ static void rtc_clk_32k_enable_common(int dac, int dres, int dbias)
        So the Touch DAC start to drive some current from VDD to TOUCH8(which is also XTAL-N)
      */
     SET_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_XPD_M);
+#endif // CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
     /* Power up external xtal */
     SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K_M);
 }
@@ -147,9 +149,11 @@ void rtc_clk_32k_enable(bool enable)
         rtc_clk_32k_enable_common(XTAL_32K_DAC_VAL, XTAL_32K_DRES_VAL, XTAL_32K_DBIAS_VAL);
     } else {
         /* Disable X32N and X32P pad drive external xtal */
-        CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K);
+        CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K_M);
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
         /* Power down TOUCH */
         CLEAR_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_XPD_M);
+#endif // CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
     }
 }