commit 58243001a9419d9d1671e32611b7d15f6ed64b3a
author Sylvain Lemieux <slemieux@tycoint.com> Mon Jul 27 13:37:39 2015 -0400
committer Tom Rini <trini@konsulko.com> Mon Aug 17 08:11:50 2015 -0400
tree 6e9a0c341db8d940bcf5da4fdc195e85a950930c
parent 3d2b6a2e5f57f752c2541116beb89bf6db41a841

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>

drivers/i2c/lpc32xx_i2c.c

diff --git a/drivers/i2c/lpc32xx_i2c.c b/drivers/i2c/lpc32xx_i2c.c
index 4c66769..7f4eccd 100644
--- a/drivers/i2c/lpc32xx_i2c.c
+++ b/drivers/i2c/lpc32xx_i2c.c
@@ -200,6 +200,8 @@
 	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 */