Merge branch 'bugfix/fix_some_pm_issue_v4.2' into 'release/v4.2'

esp_pm: add an interface to get pm configuration (backport to v4.2)

See merge request espressif/esp-idf!13124

components/esp32/pm_esp32.c

@@ -237,6 +237,23 @@ esp_err_t esp_pm_configure(const void* vconfig)
     return ESP_OK;
 }
 
+esp_err_t esp_pm_get_configuration(void* vconfig)
+{
+    if (vconfig == NULL) {
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    esp_pm_config_esp32_t* config = (esp_pm_config_esp32_t*) vconfig;
+
+    portENTER_CRITICAL(&s_switch_lock);
+    config->light_sleep_enable = s_light_sleep_en;
+    config->max_freq_mhz = s_cpu_freq_by_mode[PM_MODE_CPU_MAX].freq_mhz;
+    config->min_freq_mhz = s_cpu_freq_by_mode[PM_MODE_APB_MIN].freq_mhz;
+    portEXIT_CRITICAL(&s_switch_lock);
+
+    return ESP_OK;
+}
+
 static pm_mode_t IRAM_ATTR get_lowest_allowed_mode(void)
 {
     /* TODO: optimize using ffs/clz */

components/esp32s2/pm_esp32s2.c

@@ -232,6 +232,23 @@ esp_err_t esp_pm_configure(const void* vconfig)
     return ESP_OK;
 }
 
+esp_err_t esp_pm_get_configuration(void* vconfig)
+{
+    if (vconfig == NULL) {
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    esp_pm_config_esp32s2_t* config = (esp_pm_config_esp32s2_t*) vconfig;
+
+    portENTER_CRITICAL(&s_switch_lock);
+    config->light_sleep_enable = s_light_sleep_en;
+    config->max_freq_mhz = s_cpu_freq_by_mode[PM_MODE_CPU_MAX].freq_mhz;
+    config->min_freq_mhz = s_cpu_freq_by_mode[PM_MODE_APB_MIN].freq_mhz;
+    portEXIT_CRITICAL(&s_switch_lock);
+
+    return ESP_OK;
+}
+
 static pm_mode_t IRAM_ATTR get_lowest_allowed_mode(void)
 {
     /* TODO: optimize using ffs/clz */

components/esp_common/include/esp_pm.h

@@ -59,6 +59,14 @@ typedef enum {
  */
 esp_err_t esp_pm_configure(const void* config);
 
+/**
+ * @brief Get implementation-specific power management configuration
+ * @param config pointer to implementation-specific configuration structure (e.g. esp_pm_config_esp32)
+ * @return
+ *      - ESP_OK on success
+ *      - ESP_ERR_INVALID_ARG if the pointer is null
+ */
+esp_err_t esp_pm_get_configuration(void* config);
 
 /**
  * @brief Opaque handle to the power management lock