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i2c: rockchip: De-initialize the bus after start bit failure

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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>
This commit is contained in:
Ondrej Jirman
2022-09-05 19:33:44 +02:00
parent 1dd39aa2dc
commit dfd0e5d876
1 changed files with 4 additions and 3 deletions
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7
drivers/i2c/rk_i2c.c
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@@ -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)