X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fi2c%2Ffsl_i2c.c;h=cb13deeea968c91ae73db887b33793c0d3fef86a;hb=4e0499ebb0ac53aca45735ed63a3230df3280fb8;hp=4d5552bcd5356a790db0c868d46378ee38cb7c9c;hpb=99404202127346b9e91503bbd69deafa18c980c4;p=u-boot

diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 4d5552bcd5..cb13deeea9 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -221,9 +221,10 @@ i2c_init(int speed, int slaveadd)
 	unsigned int temp;
 
 #ifdef CONFIG_SYS_I2C_INIT_BOARD
-	/* call board specific i2c bus reset routine before accessing the   */
-	/* environment, which might be in a chip on that bus. For details   */
-	/* about this problem see doc/I2C_Edge_Conditions.                  */
+	/* Call board specific i2c bus reset routine before accessing the
+	 * environment, which might be in a chip on that bus. For details
+	 * about this problem see doc/I2C_Edge_Conditions.
+	*/
 	i2c_init_board();
 #endif
 	dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
@@ -249,6 +250,15 @@ i2c_init(int speed, int slaveadd)
 	writeb(0x0, &dev->sr);			/* clear status register */
 	writeb(I2C_CR_MEN, &dev->cr);		/* start I2C controller */
 #endif
+
+#ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
+	/* Call board specific i2c bus reset routine AFTER the bus has been
+	 * initialized. Use either this callpoint or i2c_init_board;
+	 * which is called before i2c_init operations.
+	 * For details about this problem see doc/I2C_Edge_Conditions.
+	*/
+	i2c_board_late_init();
+#endif
 }
 
 static int
@@ -353,9 +363,10 @@ __i2c_read(u8 *data, int length)
 			writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_TXAK,
 			       &i2c_dev[i2c_bus_num]->cr);
 
-		/* Generate stop on last byte */
+		/* Do not generate stop on last byte */
 		if (i == length - 1)
-			writeb(I2C_CR_MEN | I2C_CR_TXAK, &i2c_dev[i2c_bus_num]->cr);
+			writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX,
+			       &i2c_dev[i2c_bus_num]->cr);
 
 		data[i] = readb(&i2c_dev[i2c_bus_num]->dr);
 	}
@@ -378,11 +389,11 @@ i2c_read(u8 dev, uint addr, int alen, u8 *data, int length)
 	    && i2c_write_addr(dev, I2C_READ_BIT, 1) != 0)
 		i = __i2c_read(data, length);
 
-	if (length && i2c_wait4bus()) /* Wait until STOP */
-		debug("i2c_read: wait4bus timed out\n");
-
 	writeb(I2C_CR_MEN, &i2c_dev[i2c_bus_num]->cr);
 
+	if (i2c_wait4bus()) /* Wait until STOP */
+		debug("i2c_read: wait4bus timed out\n");
+
 	if (i == length)
 	    return 0;