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[2/2] iio: dac: ad5593r: add check for i2c functionality

Message ID 20220913073413.140475-3-nuno.sa@analog.com (mailing list archive)
State Accepted
Headers show
Series ad5593r fix read protocol | expand

Commit Message

Nuno Sa Sept. 13, 2022, 7:34 a.m. UTC 
Make sure that the needed i2c functionality is supported during probe.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
---
 drivers/iio/dac/ad5593r.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/iio/dac/ad5593r.c b/drivers/iio/dac/ad5593r.c
index 43ee4efb250c..f09433e298db 100644
--- a/drivers/iio/dac/ad5593r.c
+++ b/drivers/iio/dac/ad5593r.c
@@ -98,6 +98,10 @@  static const struct ad5592r_rw_ops ad5593r_rw_ops = {
 static int ad5593r_i2c_probe(struct i2c_client *i2c,
 		const struct i2c_device_id *id)
 {
+	if (!i2c_check_functionality(i2c->adapter,
+				     I2C_FUNC_SMBUS_BYTE | I2C_FUNC_I2C))
+		return -EOPNOTSUPP;
+
 	return ad5592r_probe(&i2c->dev, id->name, &ad5593r_rw_ops);
 }