Commit c0683bfd authored by Stefan Popa's avatar Stefan Popa Committed by Jonathan Cameron

staging: iio: adc: ad7606: Use devm functions in probe

Switch to devm version of request_irq, iio_triggered_buffer_setup,
iio_device_register. To avoid potential ordering issues in probe,
devm_add_action_or_reset() is used for the regulator_disable(). This
simplifies the code and decreases the chance of bugs.
Signed-off-by: default avatarStefan Popa <stefan.popa@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 557e585c
......@@ -418,6 +418,13 @@ static const struct iio_info ad7606_info_range = {
.attrs = &ad7606_attribute_group_range,
};
static void ad7606_regulator_disable(void *data)
{
struct ad7606_state *st = data;
regulator_disable(st->reg);
}
int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
const char *name, unsigned int id,
const struct ad7606_bus_ops *bops)
......@@ -431,6 +438,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
return -ENOMEM;
st = iio_priv(indio_dev);
dev_set_drvdata(dev, indio_dev);
st->dev = dev;
mutex_init(&st->lock);
......@@ -451,11 +459,15 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
return ret;
}
ret = devm_add_action_or_reset(dev, ad7606_regulator_disable, st);
if (ret)
return ret;
st->chip_info = &ad7606_chip_info_tbl[id];
ret = ad7606_request_gpios(st);
if (ret)
goto error_disable_reg;
return ret;
indio_dev->dev.parent = dev;
if (st->gpio_os) {
......@@ -480,50 +492,21 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
if (ret)
dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");
ret = request_irq(irq, ad7606_interrupt, IRQF_TRIGGER_FALLING, name,
indio_dev);
if (ret)
goto error_disable_reg;
ret = iio_triggered_buffer_setup(indio_dev, &ad7606_trigger_handler,
NULL, NULL);
ret = devm_request_irq(dev, irq, ad7606_interrupt, IRQF_TRIGGER_FALLING,
name, indio_dev);
if (ret)
goto error_free_irq;
return ret;
ret = iio_device_register(indio_dev);
ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
&ad7606_trigger_handler,
NULL, NULL);
if (ret)
goto error_unregister_ring;
dev_set_drvdata(dev, indio_dev);
return 0;
error_unregister_ring:
iio_triggered_buffer_cleanup(indio_dev);
error_free_irq:
free_irq(irq, indio_dev);
return ret;
error_disable_reg:
regulator_disable(st->reg);
return ret;
return devm_iio_device_register(dev, indio_dev);
}
EXPORT_SYMBOL_GPL(ad7606_probe);
int ad7606_remove(struct device *dev, int irq)
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad7606_state *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
free_irq(irq, indio_dev);
regulator_disable(st->reg);
return 0;
}
EXPORT_SYMBOL_GPL(ad7606_remove);
#ifdef CONFIG_PM_SLEEP
static int ad7606_suspend(struct device *dev)
......
......@@ -85,7 +85,6 @@ struct ad7606_bus_ops {
int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
const char *name, unsigned int id,
const struct ad7606_bus_ops *bops);
int ad7606_remove(struct device *dev, int irq);
enum ad7606_supported_device_ids {
ID_AD7605_4,
......
......@@ -72,11 +72,6 @@ static int ad7606_par_probe(struct platform_device *pdev)
&ad7606_par8_bops);
}
static int ad7606_par_remove(struct platform_device *pdev)
{
return ad7606_remove(&pdev->dev, platform_get_irq(pdev, 0));
}
static const struct platform_device_id ad7606_driver_ids[] = {
{
.name = "ad7605-4",
......@@ -98,7 +93,6 @@ MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
static struct platform_driver ad7606_driver = {
.probe = ad7606_par_probe,
.remove = ad7606_par_remove,
.id_table = ad7606_driver_ids,
.driver = {
.name = "ad7606",
......
......@@ -49,11 +49,6 @@ static int ad7606_spi_probe(struct spi_device *spi)
&ad7606_spi_bops);
}
static int ad7606_spi_remove(struct spi_device *spi)
{
return ad7606_remove(&spi->dev, spi->irq);
}
static const struct spi_device_id ad7606_id[] = {
{"ad7605-4", ID_AD7605_4},
{"ad7606-8", ID_AD7606_8},
......@@ -69,7 +64,6 @@ static struct spi_driver ad7606_driver = {
.pm = AD7606_PM_OPS,
},
.probe = ad7606_spi_probe,
.remove = ad7606_spi_remove,
.id_table = ad7606_id,
};
module_spi_driver(ad7606_driver);
......
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