From: Ismael Luceno Cortes <ismael.luceno@silicon-gears.com>
Date: Thu, 7 Mar 2019 18:00:52 +0000 (+0000)
Subject: i2c: rcar_i2c: Fix sending of slave addresses
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=3ad31eb1cc6ed4b9a54529df5a30c8321a0ec0de;p=u-boot.git

i2c: rcar_i2c: Fix sending of slave addresses

Do the reset before clearing the MSR, otherwise it may result in a read
or write operation instead if the start condition is repeated.

Signed-off-by: Ismael Luceno <ismael.luceno@silicon-gears.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
---

diff --git a/drivers/i2c/rcar_i2c.c b/drivers/i2c/rcar_i2c.c
index d7b27204cb..a88fbcf34f 100644
--- a/drivers/i2c/rcar_i2c.c
+++ b/drivers/i2c/rcar_i2c.c
@@ -134,9 +134,11 @@ static int rcar_i2c_set_addr(struct udevice *dev, u8 chip, u8 read)
 	}
 
 	writel((chip << 1) | read, priv->base + RCAR_I2C_ICMAR);
-	writel(0, priv->base + RCAR_I2C_ICMSR);
+	/* Reset */
 	writel(RCAR_I2C_ICMCR_MDBS | RCAR_I2C_ICMCR_MIE | RCAR_I2C_ICMCR_ESG,
 	       priv->base + RCAR_I2C_ICMCR);
+	/* Clear Status */
+	writel(0, priv->base + RCAR_I2C_ICMSR);
 
 	ret = wait_for_bit_le32(priv->base + RCAR_I2C_ICMSR, mask,
 				true, 100, true);