Re: [U-Boot] [PATCH v3 3/6] i2c: rcar_i2c: Fix sending of slave addresses
Hello Ismael, Am 06.03.2019 um 11:46 schrieb Ismael Luceno Cortes: 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 --- drivers/i2c/rcar_i2c.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) Reviewed-by: Heiko Schocher bye, Heiko -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-52 Fax: +49-8142-66989-80 Email: h...@denx.de ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
Re: [U-Boot] [PATCH v3 3/6] i2c: rcar_i2c: Fix sending of slave addresses
On 3/6/19 11:46 AM, Ismael Luceno Cortes wrote: > 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: Marek Vasut -- Best regards, Marek Vasut ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
[U-Boot] [PATCH v3 3/6] 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 --- 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 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); -- 2.19.1 ___ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
