[U-Boot] [PATCH] fsl_i2c: Do not generate STOP after read.

[Joakim Tjernlund]

__i2c_read always ends with a STOP condition thereby releasing
the bus. It is cleaner to do the STOP magic in i2c_read(), like
i2c_write() does. This may also help future multimaster systems which
wants to hold on to the bus until all transactions are finished.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund at transmode.se>
---

This is on top of my earlier fsl_i2c series. I am about
to send a similar patch to the kernel.

 drivers/i2c/fsl_i2c.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c
index 0c5f6be..413bcba 100644
--- a/drivers/i2c/fsl_i2c.c
+++ b/drivers/i2c/fsl_i2c.c
@@ -333,9 +333,10 @@ __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);
 	}
@@ -358,11 +359,11 @@ 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;
 
-- 
1.6.4.3