diff --git a/include/linux/platform_data/spi-s3c64xx.h b/include/linux/platform_data/spi-s3c64xx.h
index 5df1ace6d2c98..3101152ce449f 100644
--- a/include/linux/platform_data/spi-s3c64xx.h
+++ b/include/linux/platform_data/spi-s3c64xx.h
@@ -29,6 +29,7 @@ struct s3c64xx_spi_csinfo {
  * struct s3c64xx_spi_info - SPI Controller defining structure
  * @src_clk_nr: Clock source index for the CLK_CFG[SPI_CLKSEL] field.
  * @num_cs: Number of CS this controller emulates.
+ * @no_cs: Used when CS line is not connected.
  * @cfg_gpio: Configure pins for this SPI controller.
  */
 struct s3c64xx_spi_info {