From 3ad31eb1cc6ed4b9a54529df5a30c8321a0ec0de Mon Sep 17 00:00:00 2001 From: Ismael Luceno Cortes Date: Thu, 7 Mar 2019 18:00:52 +0000 Subject: [PATCH] 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 Reviewed-by: Marek Vasut Reviewed-by: Heiko Schocher --- drivers/i2c/rcar_i2c.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/rcar_i2c.c b/drivers/i2c/rcar_i2c.c index d7b2720..a88fbcf 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); -- 2.7.4