devm_* APIs are device managed and make code simpler.
Signed-off-by: Slawomir Stepien <sst@xxxxxxxxx>
---
Since v4:
* on devm_add_action fail, call the action on error handling
* move the devm_add_action just after spi_setup - this will call the action on
more error paths in probe (fail in: ad7280_chain_setup, ad7280_channel_init,
ad7280_attr_init)
Since v3:
* use devm_add_action with software power down
* the whole remove call back is not needed anymore
Since v2:
* iio_device_register -> devm_iio_device_register
Since v1:
* request_threaded_irq -> devm_request_threaded_irq
---
drivers/staging/iio/adc/ad7280a.c | 97 +++++++++++++------------------
1 file changed, 41 insertions(+), 56 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index 58420dcb406d..0d82be30a5de 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -342,6 +342,14 @@ static int ad7280_read_all_channels(struct ad7280_state *st, unsigned int cnt,
return sum;
}
+static void ad7280_sw_power_down(void *data)
+{
+ struct ad7280_state *st = data;
+
+ ad7280_write(st, AD7280A_DEVADDR_MASTER, AD7280A_CONTROL_HB, 1,
+ AD7280A_CTRL_HB_PWRDN_SW | st->ctrl_hb);
+}
+
static int ad7280_chain_setup(struct ad7280_state *st)
{
unsigned int val, n;
@@ -492,8 +500,8 @@ static int ad7280_channel_init(struct ad7280_state *st)
{
int dev, ch, cnt;
- st->channels = kcalloc((st->slave_num + 1) * 12 + 2,
- sizeof(*st->channels), GFP_KERNEL);
+ st->channels = devm_kcalloc(&st->spi->dev, (st->slave_num + 1) * 12 + 2,
+ sizeof(*st->channels), GFP_KERNEL);
if (!st->channels)
return -ENOMEM;
@@ -552,16 +560,18 @@ static int ad7280_channel_init(struct ad7280_state *st)
static int ad7280_attr_init(struct ad7280_state *st)
{
int dev, ch, cnt;
+ unsigned int index;
- st->iio_attr = kcalloc(2, sizeof(*st->iio_attr) *
- (st->slave_num + 1) * AD7280A_CELLS_PER_DEV,
- GFP_KERNEL);
+ st->iio_attr = devm_kcalloc(&st->spi->dev, 2, sizeof(*st->iio_attr) *
+ (st->slave_num + 1) * AD7280A_CELLS_PER_DEV,
+ GFP_KERNEL);
if (!st->iio_attr)
return -ENOMEM;
for (dev = 0, cnt = 0; dev <= st->slave_num; dev++)
for (ch = AD7280A_CELL_VOLTAGE_1; ch <= AD7280A_CELL_VOLTAGE_6;
ch++, cnt++) {
+ index = dev * AD7280A_CELLS_PER_DEV + ch;
st->iio_attr[cnt].address =
ad7280a_devaddr(dev) << 8 | ch;
st->iio_attr[cnt].dev_attr.attr.mode =
@@ -571,10 +581,9 @@ static int ad7280_attr_init(struct ad7280_state *st)
st->iio_attr[cnt].dev_attr.store =
ad7280_store_balance_sw;
st->iio_attr[cnt].dev_attr.attr.name =
- kasprintf(GFP_KERNEL,
- "in%d-in%d_balance_switch_en",
- dev * AD7280A_CELLS_PER_DEV + ch,
- dev * AD7280A_CELLS_PER_DEV + ch + 1);
+ devm_kasprintf(&st->spi->dev, GFP_KERNEL,
+ "in%d-in%d_balance_switch_en",
+ index, index + 1);
ad7280_attributes[cnt] =
&st->iio_attr[cnt].dev_attr.attr;
cnt++;
@@ -588,10 +597,9 @@ static int ad7280_attr_init(struct ad7280_state *st)
st->iio_attr[cnt].dev_attr.store =
ad7280_store_balance_timer;
st->iio_attr[cnt].dev_attr.attr.name =
- kasprintf(GFP_KERNEL,
- "in%d-in%d_balance_timer",
- dev * AD7280A_CELLS_PER_DEV + ch,
- dev * AD7280A_CELLS_PER_DEV + ch + 1);
+ devm_kasprintf(&st->spi->dev, GFP_KERNEL,
+ "in%d-in%d_balance_timer",
+ index, index + 1);
ad7280_attributes[cnt] =
&st->iio_attr[cnt].dev_attr.attr;
}
@@ -863,6 +871,12 @@ static int ad7280_probe(struct spi_device *spi)
st->spi->mode = SPI_MODE_1;
spi_setup(st->spi);
+ ret = devm_add_action(&spi->dev, ad7280_sw_power_down, st);
+ if (ret) {
+ ad7280_sw_power_down(st);
+ return ret;
+ }
+
st->ctrl_lb = AD7280A_CTRL_LB_ACQ_TIME(pdata->acquisition_time & 0x3);
st->ctrl_hb = AD7280A_CTRL_HB_CONV_AVG(pdata->conversion_averaging
& 0x3) | (pdata->thermistor_term_en ?
@@ -909,65 +923,37 @@ static int ad7280_probe(struct spi_device *spi)
ret = ad7280_attr_init(st);
if (ret < 0)
- goto error_free_channels;
+ return ret;
- ret = iio_device_register(indio_dev);
+ ret = devm_iio_device_register(&spi->dev, indio_dev);
if (ret)
- goto error_free_attr;
+ return ret;
if (spi->irq > 0) {
ret = ad7280_write(st, AD7280A_DEVADDR_MASTER,
AD7280A_ALERT, 1,
AD7280A_ALERT_RELAY_SIG_CHAIN_DOWN);
if (ret)
- goto error_unregister;
+ return ret;
ret = ad7280_write(st, ad7280a_devaddr(st->slave_num),
AD7280A_ALERT, 0,
AD7280A_ALERT_GEN_STATIC_HIGH |
(pdata->chain_last_alert_ignore & 0xF));
if (ret)
- goto error_unregister;
-
- ret = request_threaded_irq(spi->irq,
- NULL,
- ad7280_event_handler,
- IRQF_TRIGGER_FALLING |
- IRQF_ONESHOT,
- indio_dev->name,
- indio_dev);
+ return ret;
+
+ ret = devm_request_threaded_irq(&spi->dev, spi->irq,
+ NULL,
+ ad7280_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ indio_dev->name,
+ indio_dev);
if (ret)
- goto error_unregister;
+ return ret;
}
- return 0;
-error_unregister:
- iio_device_unregister(indio_dev);
-
-error_free_attr:
- kfree(st->iio_attr);
-
-error_free_channels:
- kfree(st->channels);
-
- return ret;
-}
-
-static int ad7280_remove(struct spi_device *spi)
-{
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
- struct ad7280_state *st = iio_priv(indio_dev);
-
- if (spi->irq > 0)
- free_irq(spi->irq, indio_dev);
- iio_device_unregister(indio_dev);
-
- ad7280_write(st, AD7280A_DEVADDR_MASTER, AD7280A_CONTROL_HB, 1,
- AD7280A_CTRL_HB_PWRDN_SW | st->ctrl_hb);
-
- kfree(st->channels);
- kfree(st->iio_attr);
-
return 0;
}
@@ -982,7 +968,6 @@ static struct spi_driver ad7280_driver = {
.name = "ad7280",
},
.probe = ad7280_probe,
- .remove = ad7280_remove,
.id_table = ad7280_id,
};
module_spi_driver(ad7280_driver);
--
2.19.1
