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SubjectRe: [PATCH 3/3] iio: potentiometer: merge calls to of_match_device and of_device_get_match_data
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On 2018-05-21 11:49, Julia Lawall wrote:
> Drop call to of_match_device, which is subsumed by the subsequent
> call to of_device_get_match_data. The code becomes simpler, and a
> temporary variable can be dropped.
>
> The semantic match that makes this change is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @r@
> local idexpression match;
> identifier i;
> expression x, dev, e, e1;
> @@
> - match@i = of_match_device(x, dev);
> - if (match) e = of_device_get_match_data(dev);
> - else e = e1;
> + e = of_device_get_match_data(dev);
> + if (!e) e = e1;
>
> @@
> identifier r.i;
> @@
> - const struct of_device_id *i;
> ... when != i
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Reviewed-by: Peter Rosin <peda@axentia.se>

Cheers,
Peter

>
> ---
> drivers/iio/potentiometer/max5481.c | 7 ++-----
> drivers/iio/potentiometer/mcp4018.c | 7 ++-----
> drivers/iio/potentiometer/mcp4531.c | 7 ++-----
> 3 files changed, 6 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/iio/potentiometer/mcp4018.c b/drivers/iio/potentiometer/mcp4018.c
> index 320a7c9..c051ee0 100644
> --- a/drivers/iio/potentiometer/mcp4018.c
> +++ b/drivers/iio/potentiometer/mcp4018.c
> @@ -147,7 +147,6 @@ static int mcp4018_probe(struct i2c_client *client)
> struct device *dev = &client->dev;
> struct mcp4018_data *data;
> struct iio_dev *indio_dev;
> - const struct of_device_id *match;
>
> if (!i2c_check_functionality(client->adapter,
> I2C_FUNC_SMBUS_BYTE)) {
> @@ -162,10 +161,8 @@ static int mcp4018_probe(struct i2c_client *client)
> i2c_set_clientdata(client, indio_dev);
> data->client = client;
>
> - match = of_match_device(of_match_ptr(mcp4018_of_match), dev);
> - if (match)
> - data->cfg = of_device_get_match_data(dev);
> - else
> + data->cfg = of_device_get_match_data(dev);
> + if (!data->cfg)
> data->cfg = &mcp4018_cfg[i2c_match_id(mcp4018_id, client)->driver_data];
>
> indio_dev->dev.parent = dev;
> diff --git a/drivers/iio/potentiometer/mcp4531.c b/drivers/iio/potentiometer/mcp4531.c
> index df894af..d87ca85 100644
> --- a/drivers/iio/potentiometer/mcp4531.c
> +++ b/drivers/iio/potentiometer/mcp4531.c
> @@ -360,7 +360,6 @@ static int mcp4531_probe(struct i2c_client *client)
> struct device *dev = &client->dev;
> struct mcp4531_data *data;
> struct iio_dev *indio_dev;
> - const struct of_device_id *match;
>
> if (!i2c_check_functionality(client->adapter,
> I2C_FUNC_SMBUS_WORD_DATA)) {
> @@ -375,10 +374,8 @@ static int mcp4531_probe(struct i2c_client *client)
> i2c_set_clientdata(client, indio_dev);
> data->client = client;
>
> - match = of_match_device(of_match_ptr(mcp4531_of_match), dev);
> - if (match)
> - data->cfg = of_device_get_match_data(dev);
> - else
> + data->cfg = of_device_get_match_data(dev);
> + if (!data->cfg)
> data->cfg = &mcp4531_cfg[i2c_match_id(mcp4531_id, client)->driver_data];
>
> indio_dev->dev.parent = dev;
> diff --git a/drivers/iio/potentiometer/max5481.c b/drivers/iio/potentiometer/max5481.c
> index ffe2761..6d2f13f 100644
> --- a/drivers/iio/potentiometer/max5481.c
> +++ b/drivers/iio/potentiometer/max5481.c
> @@ -137,7 +137,6 @@ static int max5481_probe(struct spi_device *spi)
> struct iio_dev *indio_dev;
> struct max5481_data *data;
> const struct spi_device_id *id = spi_get_device_id(spi);
> - const struct of_device_id *match;
> int ret;
>
> indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*data));
> @@ -149,10 +148,8 @@ static int max5481_probe(struct spi_device *spi)
>
> data->spi = spi;
>
> - match = of_match_device(of_match_ptr(max5481_match), &spi->dev);
> - if (match)
> - data->cfg = of_device_get_match_data(&spi->dev);
> - else
> + data->cfg = of_device_get_match_data(&spi->dev);
> + if (!data->cfg)
> data->cfg = &max5481_cfg[id->driver_data];
>
> indio_dev->name = id->name;
>

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