I2C: if received nak when send address, retry 3 times

diff --git a/drivers/i2c/busses/i2c-rk29.c b/drivers/i2c/busses/i2c-rk29.c
index 06aea18ad670f7403e156a44be431c4eb35224a0..69af912074c81e9d0de6b4050ee15eea341fffad 100755 (executable)
--- a/drivers/i2c/busses/i2c-rk29.c
+++ b/drivers/i2c/busses/i2c-rk29.c
@@ -398,7 +398,7 @@ static int rk29_send_address(struct rk29_i2c_data *i2c,
        if((lsr & I2C_LSR_RCV_NAK) && !(msg->flags & I2C_M_IGNORE_NAK))
        {
                dev_info(i2c->dev, "addr: 0x%x receive no ack\n", msg->addr);
-               return -EINVAL;
+               return -EAGAIN;
        }
        if(start && (msg->flags & I2C_M_TEN))
                ret = rk29_send_2nd_addr(i2c, msg, start);
@@ -722,6 +722,9 @@ static int rk29_i2c_probe(struct platform_device *pdev)
        i2c->adap.algo          = &rk29_i2c_algorithm;
        i2c->adap.class         = I2C_CLASS_HWMON;
        i2c->adap.nr            = pdata->bus_num;
+    i2c->adap.retries   = 3;
+    i2c->adap.timeout   = msecs_to_jiffies(500);
+
        spin_lock_init(&i2c->cmd_lock);
 
        i2c->dev = &pdev->dev;