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iio: light: tcs3414: convert probe to device-managed routines 

This change converts the driver to use only device-managed init routines in
the probe function of the driver.

This way, we no longer need the tcs3414_remove() hook.
We still need to keep the i2c_set_clientdata() call, as that's being used
for the PM routines.

And lastly, a devm_add_action_or_reset() hook is added to call the
powerdown handler when the chip is uninitialized or the probe fails.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210624080534.9209-1-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2021-06-24 11:05:34 +03:00 committed by Jonathan Cameron
parent d272e0ab5f
commit 9ae8da91a2
1 changed files with 19 additions and 29 deletions
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48
drivers/iio/light/tcs3414.c
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@ -267,6 +267,18 @@ static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = {
.predisable = tcs3414_buffer_predisable,
};
static int tcs3414_powerdown(struct tcs3414_data *data)
{
return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
data->control & ~(TCS3414_CONTROL_POWER |
TCS3414_CONTROL_ADC_EN));
}
static void tcs3414_powerdown_cleanup(void *data)
{
tcs3414_powerdown(data);
}
static int tcs3414_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -309,6 +321,11 @@ static int tcs3414_probe(struct i2c_client *client,
if (ret < 0)
return ret;
ret = devm_add_action_or_reset(&client->dev, tcs3414_powerdown_cleanup,
data);
if (ret < 0)
return ret;
data->timing = TCS3414_INTEG_12MS; /* free running */
ret = i2c_smbus_write_byte_data(data->client, TCS3414_TIMING,
data->timing);
@ -320,38 +337,12 @@ static int tcs3414_probe(struct i2c_client *client,
return ret;
data->gain = ret;
ret = iio_triggered_buffer_setup(indio_dev, NULL,
ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
tcs3414_trigger_handler, &tcs3414_buffer_setup_ops);
if (ret < 0)
return ret;
ret = iio_device_register(indio_dev);
if (ret < 0)
goto buffer_cleanup;
return 0;
buffer_cleanup:
iio_triggered_buffer_cleanup(indio_dev);
return ret;
}
static int tcs3414_powerdown(struct tcs3414_data *data)
{
return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
data->control & ~(TCS3414_CONTROL_POWER |
TCS3414_CONTROL_ADC_EN));
}
static int tcs3414_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
tcs3414_powerdown(iio_priv(indio_dev));
return 0;
return devm_iio_device_register(&client->dev, indio_dev);
}
#ifdef CONFIG_PM_SLEEP
@ -385,7 +376,6 @@ static struct i2c_driver tcs3414_driver = {
.pm = &tcs3414_pm_ops,
},
.probe = tcs3414_probe,
.remove = tcs3414_remove,
.id_table = tcs3414_id,
};
module_i2c_driver(tcs3414_driver);