ble: support esp32c6 power save example

components/bt/controller/esp32c6/bt.c

@@ -620,7 +620,6 @@ void controller_sleep_deinit(void)
 esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
 {
     uint8_t mac[6];
-    uint32_t chip_version;
     esp_err_t ret = ESP_OK;
     ble_npl_count_info_t npl_info;
 
@@ -681,9 +680,9 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
 #endif // CONFIG_BT_NIMBLE_ENABLED
     /* Enable BT-related clocks */
     modem_clock_module_enable(PERIPH_BT_MODULE);
-    chip_version = efuse_hal_chip_revision();
     /* Select slow clock source for BT momdule */
 #if CONFIG_BT_LE_LP_CLK_SRC_MAIN_XTAL
+    uint32_t chip_version = efuse_hal_chip_revision();
     ESP_LOGI(NIMBLE_PORT_LOG_TAG, "Using main XTAL as clock source");
     if (chip_version == 0) {
         modem_clock_select_lp_clock_source(PERIPH_BT_MODULE, MODEM_CLOCK_LPCLK_SRC_MAIN_XTAL, (400 - 1));

examples/bluetooth/.build-test-rules.yml

@@ -270,6 +270,6 @@ examples/bluetooth/nimble/hci:
 
 examples/bluetooth/nimble/power_save:
   enable:
-    - if: IDF_TARGET in ["esp32", "esp32c3", "esp32s3"]
+    - if: IDF_TARGET in ["esp32", "esp32c3", "esp32s3", "esp32c6"]
       temporary: true
       reason: the other targets are not tested yet

examples/bluetooth/nimble/power_save/README.md

@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C3 | ESP32-S3 |
+| Supported Targets | ESP32 | ESP32-C3 | ESP32-C6 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- |
+| ----------------- | ----- | -------- | -------- | -------- |
 
 Bluetooth Power Save Example
 =================================
@@ -10,16 +10,20 @@ If the modem sleep mode is enabled, bluetooth will switch periodically between a
 In sleep state, RF, PHY and BB are turned off in order to reduce power consumption.
 
 This example contains five build configurations. For each configuration, a few configuration options are set:
+
 - `sdkconfig.defaults.esp32`: ESP32 uses 32kHz XTAL as low power clock in light sleep enabled.
-- `sdkconfig.40m.esp32c3`: ESP32C3 uses 32kHz XTAL as low power clock in light sleep enabled.
+- `sdkconfig.defaults.esp32c3`: ESP32C3 uses 32kHz XTAL as low power clock in light sleep enabled.
-- `sdkconfig.esp32c3_40m`: ESP32C3 uses main XTAL as low power clock in light sleep enabled.
+- `sdkconfig.40m.esp32c3`: ESP32C3 uses main XTAL as low power clock in light sleep enabled.
+- `sdkconfig.defaults.esp32c6`: ESP32C6 uses 32kHz XTAL as low power clock in light sleep enabled.
+- `sdkconfig.40m.esp32c6`: ESP32C6 uses main XTAL as low power clock in light sleep enabled.
 - `sdkconfig.defaults.esp32s3`: ESP32S3 uses 32kHz XTAL as low power clock in light sleep enabled.
 - `sdkconfig.40m.esp32s3`: ESP32S3 uses main XTAL as low power clock in light sleep enabled.
+
 ## How to use example
 
 ### Hardware Required
 
-This example should be able to run on any commonly available ESP32/ESP32-C3/ESP32-S3 development board.
+This example should be able to run on any commonly available ESP32/ESP32-C3/ESP32-S3/ESP32-C6 development board.
 
 ### Configure the project
 
@@ -33,9 +37,12 @@ idf.py menuconfig
    - `Component config > Power Management > [*] Support for power management`
 3. Configure FreeRTOS:
    - `Component config > FreeRTOS > Kernel`
-      -  `(1000) configTICK_RATE_HZ`
+     -  `(1000) configTICK_RATE_HZ`
-      -  `[*] configUSE_TICKLESS_IDLE`
+     -  `[*] configUSE_TICKLESS_IDLE`
-      -  `(3)     configEXPECTED_IDLE_TIME_BEFORE_SLEEP`
+     -  `(3)     configEXPECTED_IDLE_TIME_BEFORE_SLEEP`
+
+#### For ESP32/ESP32-C3/ESP32-S3 Chip:
+
 4. Enable power down MAC and baseband:
    - `Component config > PHY > [*] Power down MAC and baseband of Wi-Fi and Bluetooth when PHY is disabled`
 5. Enable bluetooth modem sleep:
@@ -47,6 +54,21 @@ idf.py menuconfig
 7. Enable power up main XTAL during light sleep:
    - `Component config > Bluetooth > Controller Options > MODEM SLEEP Options > [*] power up main XTAL during light sleep`
 
+#### For ESP32-C6 Chip:
+
+4. Enable bluetooth modem sleep:
+   - `Component config > Bluetooth > Controller Options`
+     - `[*] Enable BLE sleep`
+5. Configure bluetooth low power clock:
+   - `Component config → Bluetooth → Controller Options → BLE low power clock source`
+   - Use main XTAL as low power clock source during light sleep:
+     - `(X) Use main XTAL as RTC clock source`
+   - Use RTC clock source as low power clock sourceduring light sleep:
+     - `(X) Use system RTC slow clock source`
+6. Power down flash during light sleep:
+   * `Component config → Hardware Settings → Sleep Config`
+     * `[*] Power down flash in light sleep when there is no SPIRAM`
+
 ### Build and Flash
 
 ```
@@ -101,12 +123,13 @@ I (463) NimBLE:
 
 ## Typical current consumption with management enabled
 
-|         | max current | modem sleep  | light sleep (main XTAL)| light sleep (32KHz XTAL)|
+|                                             | max current | modem sleep | light sleep (main XTAL) | light sleep (32KHz XTAL) |
-|-------- | ----------- | ------------ | ---------------------- |------------------------ |
+| ------------------------------------------- | ----------- | ----------- | ----------------------- | ------------------------ |
-| ESP32   | 231 mA      | 14.1 mA      | X                      | 1.9 mA                  |
+| ESP32                                       | 231 mA      | 14.1 mA     | X                       | 1.9 mA                   |
-| ESP32C3 | 262 mA      | 12 mA        | 2.3 mA                 | 140 uA                  |
+| ESP32C3                                     | 262 mA      | 12 mA       | 2.3 mA                  | 140 uA                   |
-| ESP32S3 | 240 mA      | 17.9 mA      | 3.3 mA                 | 230 uA                  |
+| ESP32S3                                     | 240 mA      | 17.9 mA     | 3.3 mA                  | 230 uA                   |
-X: This feature is currently not supported.
+| ESP32C6                                     | 240 mA      | 22 mA       | 3.3 mA                  | 34  uA                   |
+X: This feature is currently not supported. 
 
 ## Example Breakdown
 

examples/bluetooth/nimble/power_save/sdkconfig.40m.esp32c6

@@ -0,0 +1,25 @@
+CONFIG_IDF_TARGET="esp32c6"
+
+# Bluetooth Low Power Config
+CONFIG_BT_LE_SLEEP_ENABLE=y
+# CONFIG_BT_LE_WAKEUP_SOURCE_CPU_RTC_TIMER is not set
+CONFIG_BT_LE_WAKEUP_SOURCE_BLE_RTC_TIMER=y
+CONFIG_BT_LE_LP_CLK_SRC_MAIN_XTAL=y
+# CONFIG_BT_LE_LP_CLK_SRC_DEFAULT is not set
+
+#
+# Power Management
+#
+CONFIG_PM_ENABLE=y
+CONFIG_PM_DFS_INIT_AUTO=y
+CONFIG_PM_POWER_DOWN_CPU_IN_LIGHT_SLEEP=y
+# CONFIG_PM_POWER_DOWN_PERIPHERAL_IN_LIGHT_SLEEP is not set
+# end of Power Management
+
+CONFIG_FREERTOS_USE_TICKLESS_IDLE=y
+
+#
+# Sleep Config
+#
+CONFIG_ESP_SLEEP_POWER_DOWN_FLASH=y
+# end of Sleep Config

examples/bluetooth/nimble/power_save/sdkconfig.defaults.esp32c6

@@ -0,0 +1,34 @@
+CONFIG_IDF_TARGET="esp32c6"
+
+# Bluetooth Low Power Config
+CONFIG_BT_LE_SLEEP_ENABLE=y
+# CONFIG_BT_LE_WAKEUP_SOURCE_CPU_RTC_TIMER is not set
+CONFIG_BT_LE_WAKEUP_SOURCE_BLE_RTC_TIMER=y
+# CONFIG_BT_LE_LP_CLK_SRC_MAIN_XTAL is not set
+CONFIG_BT_LE_LP_CLK_SRC_DEFAULT=y
+
+#
+# Power Management
+#
+CONFIG_PM_ENABLE=y
+CONFIG_PM_DFS_INIT_AUTO=y
+CONFIG_PM_POWER_DOWN_CPU_IN_LIGHT_SLEEP=y
+CONFIG_PM_POWER_DOWN_PERIPHERAL_IN_LIGHT_SLEEP=y
+# end of Power Management
+
+CONFIG_FREERTOS_USE_TICKLESS_IDLE=y
+
+#
+# Sleep Config
+#
+CONFIG_ESP_SLEEP_POWER_DOWN_FLASH=y
+# end of Sleep Config
+
+#
+# RTC Clock Config
+#
+# CONFIG_RTC_CLK_SRC_INT_RC is not set
+CONFIG_RTC_CLK_SRC_EXT_CRYS=y
+# CONFIG_RTC_CLK_SRC_EXT_OSC is not set
+# CONFIG_RTC_CLK_SRC_INT_RC32K is not set
+# end of RTC Clock Config