[PATCH-V2 04/12] i2c: pxa: Reset i2c controller on timeout in interrupt and pio mode

[Vaibhav Hiremath]

In case of timeout during msg xfer assert reset to
i2c controller for both interrupt and PIO mode of operation.

Signed-off-by: Jett.Zhou <jtzhou at marvell.com>
[vaibhav.hiremath at linaro.org: Split & merge patches into logical changes
and update the Changelog]
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath at linaro.org>
---
 drivers/i2c/busses/i2c-pxa.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 632008f..edacfeb3 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -173,6 +173,8 @@ struct pxa_i2c {
  */
 #define I2C_PXA_SLAVE_ADDR      0x1
 
+static void i2c_pxa_reset(struct pxa_i2c *i2c);
+
 #ifdef DEBUG
 
 struct bits {
@@ -750,6 +752,9 @@ out:
 		ret = I2C_RETRY;
 	}
 
+	if (ret < 0)
+		i2c_pxa_reset(i2c);
+
 	return ret;
 }
 
@@ -816,6 +821,9 @@ static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num)
 	}
 
  out:
+	if (ret < 0)
+		i2c_pxa_reset(i2c);
+
 	return ret;
 }
 
-- 
1.9.1