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Date: Thu, 30 Sep 2021 17:12:37 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Alexandru Ardelean <aardelean@...iqon.com>
Cc: linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org
Subject: Re: [PATCH] iio: adc: max1363: convert probe to full device-managed
On Sun, 26 Sep 2021 19:21:10 +0300
Alexandru Ardelean <aardelean@...iqon.com> wrote:
> For this conversion, the 2 regulators (being enabled) require each a
> devm_add_action_or_reset() hook registration.
>
> For the other functions, there are device-managed variants.
>
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
Thanks - one of my few drivers so no need for me to poke anyone else on this one :)
Applied to the togreg branch of iio.git and pushed out as testing
for 0-day to work it's magic.
Jonathan
> ---
> drivers/iio/adc/max1363.c | 82 ++++++++++++++-------------------------
> 1 file changed, 30 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
> index f2b576c69949..eef55ed4814a 100644
> --- a/drivers/iio/adc/max1363.c
> +++ b/drivers/iio/adc/max1363.c
> @@ -1577,6 +1577,11 @@ static const struct of_device_id max1363_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, max1363_of_match);
>
> +static void max1363_reg_disable(void *reg)
> +{
> + regulator_disable(reg);
> +}
> +
> static int max1363_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> @@ -1590,7 +1595,8 @@ static int max1363_probe(struct i2c_client *client,
> if (!indio_dev)
> return -ENOMEM;
>
> - ret = iio_map_array_register(indio_dev, client->dev.platform_data);
> + ret = devm_iio_map_array_register(&client->dev, indio_dev,
> + client->dev.platform_data);
> if (ret < 0)
> return ret;
>
> @@ -1598,17 +1604,16 @@ static int max1363_probe(struct i2c_client *client,
>
> mutex_init(&st->lock);
> st->reg = devm_regulator_get(&client->dev, "vcc");
> - if (IS_ERR(st->reg)) {
> - ret = PTR_ERR(st->reg);
> - goto error_unregister_map;
> - }
> + if (IS_ERR(st->reg))
> + return PTR_ERR(st->reg);
>
> ret = regulator_enable(st->reg);
> if (ret)
> - goto error_unregister_map;
> + return ret;
>
> - /* this is only used for device removal purposes */
> - i2c_set_clientdata(client, indio_dev);
> + ret = devm_add_action_or_reset(&client->dev, max1363_reg_disable, st->reg);
> + if (ret)
> + return ret;
>
> st->chip_info = device_get_match_data(&client->dev);
> if (!st->chip_info)
> @@ -1622,13 +1627,17 @@ static int max1363_probe(struct i2c_client *client,
>
> ret = regulator_enable(vref);
> if (ret)
> - goto error_disable_reg;
> + return ret;
> +
> + ret = devm_add_action_or_reset(&client->dev, max1363_reg_disable, vref);
> + if (ret)
> + return ret;
> +
> st->vref = vref;
> vref_uv = regulator_get_voltage(vref);
> - if (vref_uv <= 0) {
> - ret = -EINVAL;
> - goto error_disable_reg;
> - }
> + if (vref_uv <= 0)
> + return -EINVAL;
> +
> st->vref_uv = vref_uv;
> }
>
> @@ -1640,13 +1649,12 @@ static int max1363_probe(struct i2c_client *client,
> st->send = max1363_smbus_send;
> st->recv = max1363_smbus_recv;
> } else {
> - ret = -EOPNOTSUPP;
> - goto error_disable_reg;
> + return -EOPNOTSUPP;
> }
>
> ret = max1363_alloc_scan_masks(indio_dev);
> if (ret)
> - goto error_disable_reg;
> + return ret;
>
> indio_dev->name = id->name;
> indio_dev->channels = st->chip_info->channels;
> @@ -1655,12 +1663,12 @@ static int max1363_probe(struct i2c_client *client,
> indio_dev->modes = INDIO_DIRECT_MODE;
> ret = max1363_initial_setup(st);
> if (ret < 0)
> - goto error_disable_reg;
> + return ret;
>
> - ret = iio_triggered_buffer_setup(indio_dev, NULL,
> - &max1363_trigger_handler, NULL);
> + ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
> + &max1363_trigger_handler, NULL);
> if (ret)
> - goto error_disable_reg;
> + return ret;
>
> if (client->irq) {
> ret = devm_request_threaded_irq(&client->dev, st->client->irq,
> @@ -1671,39 +1679,10 @@ static int max1363_probe(struct i2c_client *client,
> indio_dev);
>
> if (ret)
> - goto error_uninit_buffer;
> + return ret;
> }
>
> - ret = iio_device_register(indio_dev);
> - if (ret < 0)
> - goto error_uninit_buffer;
> -
> - return 0;
> -
> -error_uninit_buffer:
> - iio_triggered_buffer_cleanup(indio_dev);
> -error_disable_reg:
> - if (st->vref)
> - regulator_disable(st->vref);
> - regulator_disable(st->reg);
> -error_unregister_map:
> - iio_map_array_unregister(indio_dev);
> - return ret;
> -}
> -
> -static int max1363_remove(struct i2c_client *client)
> -{
> - struct iio_dev *indio_dev = i2c_get_clientdata(client);
> - struct max1363_state *st = iio_priv(indio_dev);
> -
> - iio_device_unregister(indio_dev);
> - iio_triggered_buffer_cleanup(indio_dev);
> - if (st->vref)
> - regulator_disable(st->vref);
> - regulator_disable(st->reg);
> - iio_map_array_unregister(indio_dev);
> -
> - return 0;
> + return devm_iio_device_register(&client->dev, indio_dev);
> }
>
> static const struct i2c_device_id max1363_id[] = {
> @@ -1756,7 +1735,6 @@ static struct i2c_driver max1363_driver = {
> .of_match_table = max1363_of_match,
> },
> .probe = max1363_probe,
> - .remove = max1363_remove,
> .id_table = max1363_id,
> };
> module_i2c_driver(max1363_driver);
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