From ba5b9203f55bae1ef3566a84648cad46c6949270 Mon Sep 17 00:00:00 2001 From: Ondrej Jirman Date: Thu, 25 May 2023 14:18:17 +0200 Subject: [PATCH] i2c: rockchip: De-initialize the bus after start bit failure Failure can happen when i2c is used without initializing pinctrl properly, which U-Boot happily allows in SPL. Without this fix, further I2C access would fail, even after proper pinctrl initialization. Signed-off-by: Ondrej Jirman Cc: Heiko Schocher Reviewed-by: Kever Yang Reviewed-by: Heiko Schocher --- drivers/i2c/rk_i2c.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/rk_i2c.c b/drivers/i2c/rk_i2c.c index f8fac45b6c..9927af94a8 100644 --- a/drivers/i2c/rk_i2c.c +++ b/drivers/i2c/rk_i2c.c @@ -342,7 +342,7 @@ static int rockchip_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs) { struct rk_i2c *i2c = dev_get_priv(bus); - int ret; + int ret = 0; debug("i2c_xfer: %d messages\n", nmsgs); for (; nmsgs > 0; nmsgs--, msg++) { @@ -356,14 +356,15 @@ static int rockchip_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, } if (ret) { debug("i2c_write: error sending\n"); - return -EREMOTEIO; + ret = -EREMOTEIO; + break; } } rk_i2c_send_stop_bit(i2c); rk_i2c_disable(i2c); - return 0; + return ret; } int rockchip_i2c_set_bus_speed(struct udevice *bus, unsigned int speed) -- 2.39.5