X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fspi_flash.h;h=10d19fd4b1178d2a5c1f8e0b8deb73368125da5e;hb=a29491ade0adf3dbb9dc51be8b45530edde1f1df;hp=3d747c925b9e60c40875f9eb59645fe6a4f273c7;hpb=db8b46120aed6554d1ff405260ea6d2cc2439fcc;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/spi_flash.h b/include/spi_flash.h
index 3d747c9..10d19fd 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -14,20 +14,6 @@
 
 struct udevice;
 
-/* by default ENV use the same parameters than SF command */
-#ifndef CONFIG_ENV_SPI_BUS
-# define CONFIG_ENV_SPI_BUS	CONFIG_SF_DEFAULT_BUS
-#endif
-#ifndef CONFIG_ENV_SPI_CS
-# define CONFIG_ENV_SPI_CS	CONFIG_SF_DEFAULT_CS
-#endif
-#ifndef CONFIG_ENV_SPI_MAX_HZ
-# define CONFIG_ENV_SPI_MAX_HZ	CONFIG_SF_DEFAULT_SPEED
-#endif
-#ifndef CONFIG_ENV_SPI_MODE
-# define CONFIG_ENV_SPI_MODE	CONFIG_SF_DEFAULT_MODE
-#endif
-
 struct spi_slave;
 
 struct dm_spi_flash_ops {
@@ -61,7 +47,7 @@ struct dm_spi_flash_ops {
  * @offset:	Offset into device in bytes to read from
  * @len:	Number of bytes to read
  * @buf:	Buffer to put the data that is read
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
 
@@ -72,7 +58,7 @@ int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
  * @offset:	Offset into device in bytes to write to
  * @len:	Number of bytes to write
  * @buf:	Buffer containing bytes to write
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
 		       const void *buf);
@@ -85,7 +71,7 @@ int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
  * @dev:	SPI flash device
  * @offset:	Offset into device in bytes to start erasing
  * @len:	Number of bytes to erase
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
 
@@ -97,7 +83,7 @@ int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
  * defined.
  *
  * @dev:	SPI flash device
- * @return 0 if no region is write-protected, 1 if a region is
+ * Return: 0 if no region is write-protected, 1 if a region is
  *	write-protected, -ENOSYS if the driver does not implement this,
  *	other -ve value on error
  */
@@ -111,12 +97,11 @@ int spl_flash_get_sw_write_prot(struct udevice *dev);
  * do this, typically with of-platdata
  *
  * @dev: SPI-flash device to probe
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_std_probe(struct udevice *dev);
 
 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
-			   unsigned int max_hz, unsigned int spi_mode,
 			   struct udevice **devp);
 
 /* Compatibility function - this is the old U-Boot API */
@@ -165,6 +150,9 @@ static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
 	struct mtd_info *mtd = &flash->mtd;
 	size_t retlen;
 
+	if (!len)
+		return 0;
+
 	return mtd->_read(mtd, offset, len, &retlen, buf);
 }
 
@@ -174,6 +162,9 @@ static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
 	struct mtd_info *mtd = &flash->mtd;
 	size_t retlen;
 
+	if (!len)
+		return 0;
+
 	return mtd->_write(mtd, offset, len, &retlen, buf);
 }
 
@@ -188,6 +179,9 @@ static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
 		return -EINVAL;
 	}
 
+	if (!len)
+		return 0;
+
 	memset(&instr, 0, sizeof(instr));
 	instr.addr = offset;
 	instr.len = len;