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i2c: exynos5: simplify transfer function 

exynos5_i2c_xfer contains lots of dead code, let's remove it and simplify
the rest. The patch should not introduce functional changes.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Suggested-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Andi Shyti <andi@etezian.org>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Andrzej Hajda 2018-05-11 11:33:07 +02:00 committed by Wolfram Sang
parent 4fad8868af
commit 043056270b
1 changed files with 7 additions and 22 deletions
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29
drivers/i2c/busses/i2c-exynos5.c
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@ -707,7 +707,7 @@ static int exynos5_i2c_xfer(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
{
struct exynos5_i2c *i2c = adap->algo_data;
int i = 0, ret = 0, stop = 0;
int i, ret;
if (i2c->suspended) {
dev_err(i2c->dev, "HS-I2C is not initialized.\n");
@ -718,30 +718,15 @@ static int exynos5_i2c_xfer(struct i2c_adapter *adap,
if (ret)
return ret;
for (i = 0; i < num; i++, msgs++) {
stop = (i == num - 1);
ret = exynos5_i2c_xfer_msg(i2c, msgs, stop);
if (ret < 0)
goto out;
for (i = 0; i < num; ++i) {
ret = exynos5_i2c_xfer_msg(i2c, msgs + i, i + 1 == num);
if (ret)
break;
}
if (i == num) {
ret = num;
} else {
/* Only one message, cannot access the device */
if (i == 1)
ret = -EREMOTEIO;
else
ret = i;
dev_warn(i2c->dev, "xfer message failed\n");
}
out:
clk_disable(i2c->clk);
return ret;
return ret ?: num;
}
static u32 exynos5_i2c_func(struct i2c_adapter *adap)