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i2c: rcar_i2c: Fix sending of slave addresses

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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>
This commit is contained in:
Ismael Luceno Cortes 2019-03-07 18:00:52 +00:00 • committed by Heiko Schocher
parent 3b59eaef4f
commit 3ad31eb1cc
1 changed files with 3 additions and 1 deletions
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4
drivers/i2c/rcar_i2c.c
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@ -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);