Write 1 to bit 4 in the configuration register to set ALERT/BUSY/GPO pin
to be used as ALERT.
Set device driver data so it can be retrieved when handling alert
events, avoiding null pointer dereference.
Fixes: <ca69300173b6> (iio: adc: Add support for AD7091R5 ADC)
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
---
drivers/iio/adc/ad7091r-base.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
index 8e252cde735b..3ecac3164446 100644
--- a/drivers/iio/adc/ad7091r-base.c
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -28,6 +28,7 @@
#define AD7091R_REG_RESULT_CONV_RESULT(x) ((x) & 0xfff)
/* AD7091R_REG_CONF */
+#define AD7091R_REG_CONF_ALERT_EN BIT(4)
#define AD7091R_REG_CONF_AUTO BIT(8)
#define AD7091R_REG_CONF_CMD BIT(10)
@@ -232,9 +233,16 @@ int ad7091r_probe(struct device *dev, const char *name,
iio_dev->channels = chip_info->channels;
if (irq) {
+ ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
+ AD7091R_REG_CONF_ALERT_EN, BIT(4));
+ if (ret)
+ return ret;
+
+ dev_set_drvdata(st->dev, iio_dev);
ret = devm_request_threaded_irq(dev, irq, NULL,
- ad7091r_event_handler,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, st);
+ ad7091r_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT, name, st);
if (ret)
return ret;
}
--
2.42.0
