Add I2C/OF IDs for DS4402 and DS4404 and set the correct channel count.
Follow-up changes add per-variant scaling based on external Rfs.

Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/iio/dac/ds4424.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/iio/dac/ds4424.c b/drivers/iio/dac/ds4424.c
index a8198ba4f98a..072b7e6672cf 100644
--- a/drivers/iio/dac/ds4424.c
+++ b/drivers/iio/dac/ds4424.c
@@ -48,6 +48,8 @@ union ds4424_raw_data {
 };
 
 enum ds4424_device_ids {
+	ID_DS4402,
+	ID_DS4404,
 	ID_DS4422,
 	ID_DS4424,
 };
@@ -248,6 +250,12 @@ static int ds4424_probe(struct i2c_client *client)
 		goto fail;
 
 	switch (id->driver_data) {
+	case ID_DS4402:
+		indio_dev->num_channels = DS4422_MAX_DAC_CHANNELS;
+		break;
+	case ID_DS4404:
+		indio_dev->num_channels = DS4424_MAX_DAC_CHANNELS;
+		break;
 	case ID_DS4422:
 		indio_dev->num_channels = DS4422_MAX_DAC_CHANNELS;
 		break;
@@ -289,6 +297,8 @@ static void ds4424_remove(struct i2c_client *client)
 }
 
 static const struct i2c_device_id ds4424_id[] = {
+	{ "ds4402", ID_DS4402 },
+	{ "ds4404", ID_DS4404 },
 	{ "ds4422", ID_DS4422 },
 	{ "ds4424", ID_DS4424 },
 	{ }
@@ -297,6 +307,8 @@ static const struct i2c_device_id ds4424_id[] = {
 MODULE_DEVICE_TABLE(i2c, ds4424_id);
 
 static const struct of_device_id ds4424_of_match[] = {
+	{ .compatible = "maxim,ds4402" },
+	{ .compatible = "maxim,ds4404" },
 	{ .compatible = "maxim,ds4422" },
 	{ .compatible = "maxim,ds4424" },
 	{ }
-- 
2.47.3