1 files changed, 11 insertions, 2 deletions
diff --git a/os/hal/ports/STM32/LLD/sdc_lld.h b/os/hal/ports/STM32/LLD/sdc_lld.h
index 428ef1568..ddca0e578 100644
--- a/os/hal/ports/STM32/LLD/sdc_lld.h
+++ b/os/hal/ports/STM32/LLD/sdc_lld.h
@@ -219,9 +219,18 @@ typedef struct SDCDriver SDCDriver;
  */
 typedef struct {
   /**
-   * @brief   Bus width(board specific).
+   * @brief   Bus width (board specific).
    */
-  sdcbusmode_t      bus_width;
+  sdcbusmode_t  bus_width;
+  /**
+   * @brief   Working area for memory consuming operations during init
+   *          procedures (temporal storage for EXT_CSD, etc.).
+   * @note    Buffer must be word aligned and big enough to store 512 bytes.
+   * @note    It is mandatory for MMC bigger than 2GB.
+   * @note    Memory can be freed after @p sdcConnect function call. Do not
+   *          forge to set this pointer to @p NULL after freeing.
+   */
+  uint8_t       *scratchpad;
 } SDCConfig;
 
 /**