From: Sylvain Lemieux <slemieux@tycoint.com>
Date: Mon, 27 Jul 2015 17:37:38 +0000 (-0400)
Subject: i2c: lpc32xx: fix read timeout
X-Git-Tag: v2015.10-rc2~4
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=3d2b6a2e5f57f752c2541116beb89bf6db41a841;p=u-boot

i2c: lpc32xx: fix read timeout

Fix a condition that generate watchdog timeout inside "lpc32xx_i2c_read" 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 98106fa988..4c66769103 100644
--- a/drivers/i2c/lpc32xx_i2c.c
+++ b/drivers/i2c/lpc32xx_i2c.c
@@ -172,12 +172,12 @@ static int lpc32xx_i2c_read(struct i2c_adapter *adap, u8 dev, uint addr,
 				*(data++) = readl(&i2c->rx);
 			}
 		}
+		/* wait for end of transation */
+		while (!((stat = readl(&i2c->stat)) & LPC32XX_I2C_STAT_TDI))
+			;
+		/* clear end-of-transaction flag */
+		writel(1, &i2c->stat);
 	}
-	/* wait for end of transation */
-	while (!((stat = readl(&i2c->stat)) & LPC32XX_I2C_STAT_TDI))
-		;
-	/* clear end-of-transaction flag */
-	writel(1, &i2c->stat);
 	/* success */
 	return 0;
 }