X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=include%2Fspi_flash.h;h=10d19fd4b1178d2a5c1f8e0b8deb73368125da5e;hb=HEAD;hp=55b4721813a7a8531f36b273fa89323b874afc94;hpb=abe66b1b5decf9cc2fb5daad42c9e870e5b99b67;p=platform%2Fkernel%2Fu-boot.git

diff --git a/include/spi_flash.h b/include/spi_flash.h
index 55b4721..10d19fd 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -9,23 +9,10 @@
 #ifndef _SPI_FLASH_H_
 #define _SPI_FLASH_H_
 
-#include <dm.h>	/* Because we dereference struct udevice here */
 #include <linux/types.h>
 #include <linux/mtd/spi-nor.h>
 
-/* 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 udevice;
 
 struct spi_slave;
 
@@ -52,7 +39,7 @@ struct dm_spi_flash_ops {
 /* Access the serial operations for a device */
 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
 
-#ifdef CONFIG_DM_SPI_FLASH
+#if CONFIG_IS_ENABLED(DM_SPI_FLASH)
 /**
  * spi_flash_read_dm() - Read data from SPI flash
  *
@@ -60,7 +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);
 
@@ -71,7 +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);
@@ -84,7 +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);
 
@@ -96,14 +83,25 @@ 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
  */
 int spl_flash_get_sw_write_prot(struct udevice *dev);
 
+/**
+ * spi_flash_std_probe() - Probe a SPI flash device
+ *
+ * This is the standard internal method for probing a SPI flash device to
+ * determine its type. It can be used in chip-specific drivers which need to
+ * do this, typically with of-platdata
+ *
+ * @dev: SPI-flash device to probe
+ * 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 */
@@ -111,7 +109,9 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
 				  unsigned int max_hz, unsigned int spi_mode);
 
 /* Compatibility function - this is the old U-Boot API */
-void spi_flash_free(struct spi_flash *flash);
+static inline void spi_flash_free(struct spi_flash *flash)
+{
+}
 
 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
 				 size_t len, void *buf)
@@ -150,6 +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);
 }
 
@@ -159,6 +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);
 }
 
@@ -173,6 +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;