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 <megi@xff.cz>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/rk_i2c.c b/drivers/i2c/rk_i2c.c
index f8fac45..9927af9 100644
--- a/drivers/i2c/rk_i2c.c
+++ b/drivers/i2c/rk_i2c.c
@@ -342,7 +342,7 @@
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 @@
}
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)