Merge branch 'feature/i2s_apll' into 'master'

driver/i2s: add support apll clock

See merge request !1115

components/driver/include/driver/i2s.h

@@ -122,6 +122,8 @@ typedef enum {
     I2S_MODE_PDM = 64,
 } i2s_mode_t;
 
+
+
 /**
  * @brief I2S configuration parameters for i2s_param_config function
  *
@@ -135,6 +137,7 @@ typedef struct {
     int                     intr_alloc_flags;       /*!< Flags used to allocate the interrupt. One or multiple (ORred) ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info */
     int                     dma_buf_count;          /*!< I2S DMA Buffer Count */
     int                     dma_buf_len;            /*!< I2S DMA Buffer Length */
+    int                     use_apll;               /*!< I2S using APLL as main I2S clock, enable it to get accurate clock */
 } i2s_config_t;
 
 /**