i2c: lpc32xx: fix write timeout

Fix a condition that generate watchdog timeout inside "lpc32xx_i2c_write" when parameters alen = 0 and len = 0.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>

diff --git a/drivers/i2c/lpc32xx_i2c.c b/drivers/i2c/lpc32xx_i2c.c
index 4c66769..7f4eccd 100644 (file)
--- a/drivers/i2c/lpc32xx_i2c.c
+++ b/drivers/i2c/lpc32xx_i2c.c
@@ -200,6 +200,8 @@ static int lpc32xx_i2c_write(struct i2c_adapter *adap, u8 dev, uint addr,
        if (alen | length)
                /* Address slave in write mode */
                writel((dev<<1) | LPC32XX_I2C_TX_START, &i2c->tx);
+       else
+               return 0;
        /* write address bytes */
        while (alen) {
                /* wait for transmit fifo not full */