2019-08-08 14:32:15

by Chuhong Yuan

Subject: [PATCH] iio: adc: max1027: Use device-managed APIs

Use device-managed APIs to simplify the code.

Signed-off-by: Chuhong Yuan <[email protected]>
---
drivers/iio/adc/max1027.c | 30 +++++++-----------------------
1 file changed, 7 insertions(+), 23 deletions(-)

diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index da84adfdb819..f1b90c544b82 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -427,8 +427,9 @@ static int max1027_probe(struct spi_device *spi)
return -ENOMEM;
}

- ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
- &max1027_trigger_handler, NULL);
+ ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+ &iio_pollfunc_store_time,
+ &max1027_trigger_handler, NULL);
if (ret < 0) {
dev_err(&indio_dev->dev, "Failed to setup buffer\n");
return ret;
@@ -439,7 +440,7 @@ static int max1027_probe(struct spi_device *spi)
if (st->trig == NULL) {
ret = -ENOMEM;
dev_err(&indio_dev->dev, "Failed to allocate iio trigger\n");
- goto fail_trigger_alloc;
+ return ret;
}

st->trig->ops = &max1027_trigger_ops;
@@ -454,7 +455,7 @@ static int max1027_probe(struct spi_device *spi)
spi->dev.driver->name, st->trig);
if (ret < 0) {
dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
- goto fail_dev_register;
+ return ret;
}

/* Disable averaging */
@@ -462,33 +463,16 @@ static int max1027_probe(struct spi_device *spi)
ret = spi_write(st->spi, &st->reg, 1);
if (ret < 0) {
dev_err(&indio_dev->dev, "Failed to configure averaging register\n");
- goto fail_dev_register;
- }
-
- ret = iio_device_register(indio_dev);
- if (ret < 0) {
- dev_err(&indio_dev->dev, "Failed to register iio device\n");
- goto fail_dev_register;
+ return ret;
}

- return 0;
-
-fail_dev_register:
-fail_trigger_alloc:
- iio_triggered_buffer_cleanup(indio_dev);
-
- return ret;
+ return devm_iio_device_register(&spi->dev, indio_dev);
}

static int max1027_remove(struct spi_device *spi)
{
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
-
pr_debug("%s: remove(spi = 0x%p)\n", __func__, spi);

- iio_device_unregister(indio_dev);
- iio_triggered_buffer_cleanup(indio_dev);
-
return 0;
}

--
2.20.1

2019-08-11 10:17:04

by Jonathan Cameron

Subject: Re: [PATCH] iio: adc: max1027: Use device-managed APIs

+CC linux-iio

On Thu, 8 Aug 2019 22:26:46 +0800
Chuhong Yuan <[email protected]> wrote:

> Use device-managed APIs to simplify the code.
>
> Signed-off-by: Chuhong Yuan <[email protected]>
Also one minor comment inline. I would have picked this up and
made that change but given it didn't go to the linux-iio, please
do a v2 scrapping the debug print and hence remove.

Thanks,

Jonathan

> ---
> drivers/iio/adc/max1027.c | 30 +++++++-----------------------
> 1 file changed, 7 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
> index da84adfdb819..f1b90c544b82 100644
> --- a/drivers/iio/adc/max1027.c
> +++ b/drivers/iio/adc/max1027.c
> @@ -427,8 +427,9 @@ static int max1027_probe(struct spi_device *spi)
> return -ENOMEM;
> }
>
> - ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
> - &max1027_trigger_handler, NULL);
> + ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
> + &iio_pollfunc_store_time,
> + &max1027_trigger_handler, NULL);
> if (ret < 0) {
> dev_err(&indio_dev->dev, "Failed to setup buffer\n");
> return ret;
> @@ -439,7 +440,7 @@ static int max1027_probe(struct spi_device *spi)
> if (st->trig == NULL) {
> ret = -ENOMEM;
> dev_err(&indio_dev->dev, "Failed to allocate iio trigger\n");
> - goto fail_trigger_alloc;
> + return ret;
> }
>
> st->trig->ops = &max1027_trigger_ops;
> @@ -454,7 +455,7 @@ static int max1027_probe(struct spi_device *spi)
> spi->dev.driver->name, st->trig);
> if (ret < 0) {
> dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
> - goto fail_dev_register;
> + return ret;
> }
>
> /* Disable averaging */
> @@ -462,33 +463,16 @@ static int max1027_probe(struct spi_device *spi)
> ret = spi_write(st->spi, &st->reg, 1);
> if (ret < 0) {
> dev_err(&indio_dev->dev, "Failed to configure averaging register\n");
> - goto fail_dev_register;
> - }
> -
> - ret = iio_device_register(indio_dev);
> - if (ret < 0) {
> - dev_err(&indio_dev->dev, "Failed to register iio device\n");
> - goto fail_dev_register;
> + return ret;
> }
>
> - return 0;
> -
> -fail_dev_register:
> -fail_trigger_alloc:
> - iio_triggered_buffer_cleanup(indio_dev);
> -
> - return ret;
> + return devm_iio_device_register(&spi->dev, indio_dev);
> }
>
> static int max1027_remove(struct spi_device *spi)
> {
> - struct iio_dev *indio_dev = spi_get_drvdata(spi);
> -
> pr_debug("%s: remove(spi = 0x%p)\n", __func__, spi);

That's not a message we need to keep. Hence can get rid of remove entirely.

>
> - iio_device_unregister(indio_dev);
> - iio_triggered_buffer_cleanup(indio_dev);
> -
> return 0;
> }
>