fixup! fixup! drivers/mtd: introduce mtd_sector_needs_erase()

drivers/include/mtd.h

@@ -507,16 +507,27 @@ int mtd_erase(mtd_dev_t *mtd, uint32_t addr, uint32_t count);
 int mtd_erase_sector(mtd_dev_t *mtd, uint32_t sector, uint32_t num);
 
 /**
- * @brief   Check whether a sector needs to be erased before it can be written
+ * @brief   Write data to a MTD device with whole sector writes
  *
- * @param      mtd    the device to erase
- * @return true if an erase is needed, false if old data will be
- *         overwritten automatically.
+ * The MTD layer will take care of splitting up the transaction into multiple
+ * writes if it is required by the underlying storage media.
+ *
+ * The sectors will be erased before writing if needed.
+ *
+ * @param      mtd      the device to write to
+ * @param[in]  src      the buffer to write
+ * @param[in]  sector   Sector number to start writing to
+ * @param[in]  num      the number of sectors to write
+ *
+ * @retval n number of bytes written on success
+ * @retval <0 value on error
+ * @retval -ENODEV if @p mtd is not a valid device
+ * @retval -ENOTSUP if operation is not supported on @p mtd
+ * @retval -EOVERFLOW if @p addr or @p count are not valid, i.e. outside memory,
+ * @retval -EIO if I/O error occurred
+ * @retval -EINVAL if parameters are invalid
  */
-static inline bool mtd_sector_needs_erase(mtd_dev_t *mtd)
-{
-    return mtd->driver->flags & MTD_DRIVER_FLAG_DIRECT_WRITE;
-}
+int mtd_write_sector(mtd_dev_t *mtd, const void *src, uint32_t sector, uint32_t num);
 
 /**
  * @brief   Set power mode on a MTD device