From: Vasily Khoruzhick Date: Sat, 16 Nov 2019 19:32:57 +0000 (-0800) Subject: rockchip: i2c: don't sent stop bit after each message X-Git-Tag: v2020.01-rc4~11^2~13 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c9fca5ec8849b8fa16b16cece091645e7d3aa02b;p=oweals%2Fu-boot.git rockchip: i2c: don't sent stop bit after each message That's not correct and it breaks SMBUS-style reads and and writes for some chips (e.g. SYR82X/SYR83X). Stop bit should be sent only after the last message. Signed-off-by: Vasily Khoruzhick Reviewed-by: Kever Yang --- diff --git a/drivers/i2c/rk_i2c.c b/drivers/i2c/rk_i2c.c index cdd94bb05a..32b2ee8578 100644 --- a/drivers/i2c/rk_i2c.c +++ b/drivers/i2c/rk_i2c.c @@ -253,7 +253,6 @@ static int rk_i2c_read(struct rk_i2c *i2c, uchar chip, uint reg, uint r_len, } i2c_exit: - rk_i2c_send_stop_bit(i2c); rk_i2c_disable(i2c); return err; @@ -332,7 +331,6 @@ static int rk_i2c_write(struct rk_i2c *i2c, uchar chip, uint reg, uint r_len, } i2c_exit: - rk_i2c_send_stop_bit(i2c); rk_i2c_disable(i2c); return err; @@ -360,6 +358,9 @@ static int rockchip_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, } } + rk_i2c_send_stop_bit(i2c); + rk_i2c_disable(i2c); + return 0; }