From: Sylvain Lemieux <slemieux@tycoint.com>
Date: Mon, 27 Jul 2015 17:37:39 +0000 (-0400)
Subject: i2c: lpc32xx: fix write timeout
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=58243001a9419d9d1671e32611b7d15f6ed64b3a;p=project%2Fbcm63xx%2Fu-boot.git

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 4c66769103..7f4eccdf53 100644
--- 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 */