iio:dac:ad5446: Add support for the AD5450/51/52/53

This patch adds support for the Analog Devices AD5450/51/52/53 Digital-to-Analog
converters.

The AD5452 and AD5453 are software compatible to the existing AD5444 and AD5446.
The AD5450 and AD5451 are similar but have a smaller resolution.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 17 insertions, 3 deletions

diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index 92fb3a003510..afd207e171cf 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -59,9 +59,9 @@ config AD5446
         tristate "Analog Devices AD5446 and similar single channel DACs driver"
         depends on SPI
         help
-          Say yes here to build support for Analog Devices AD5444, AD5446,
-          AD5512A, AD5541A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620,
-          AD5621, AD5640, AD5660, AD5662 DACs.
+          Say yes here to build support for Analog Devices AD5444, AD5446, AD5450,
+          AD5451, AD5452, AD5453, AD5512A, AD5541A, AD5542A, AD5543, AD5553, AD5601,
+          AD5611, AD5620, AD5621, AD5640, AD5660, AD5662 DACs.
 
           To compile this driver as a module, choose M here: the
           module will be called ad5446.
diff --git a/drivers/iio/dac/ad5446.c b/drivers/iio/dac/ad5446.c
index 49f557fc673b..2ca5059ef89e 100644
--- a/drivers/iio/dac/ad5446.c
+++ b/drivers/iio/dac/ad5446.c
@@ -147,6 +147,14 @@ static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
                 .channel = AD5446_CHANNEL(14, 16, 0),
                 .write = ad5446_write,
         },
+        [ID_AD5450] = {
+                .channel = AD5446_CHANNEL(8, 16, 6),
+                .write = ad5446_write,
+        },
+        [ID_AD5451] = {
+                .channel = AD5446_CHANNEL(10, 16, 4),
+                .write = ad5446_write,
+        },
         [ID_AD5541A] = {
                 .channel = AD5446_CHANNEL(16, 16, 0),
                 .write = ad5446_write,
@@ -346,6 +354,10 @@ static int ad5446_remove(struct spi_device *spi)
 static const struct spi_device_id ad5446_id[] = {
         {"ad5444", ID_AD5444},
         {"ad5446", ID_AD5446},
+        {"ad5450", ID_AD5450},
+        {"ad5451", ID_AD5451},
+        {"ad5452", ID_AD5444}, /* ad5452 is compatible to the ad5444 */
+        {"ad5453", ID_AD5446}, /* ad5453 is compatible to the ad5446 */
         {"ad5512a", ID_AD5512A},
         {"ad5541a", ID_AD5541A},
         {"ad5542a", ID_AD5541A}, /* ad5541a and ad5542a are compatible */
diff --git a/drivers/iio/dac/ad5446.h b/drivers/iio/dac/ad5446.h
index dfd68ce7427e..2934269a56d5 100644
--- a/drivers/iio/dac/ad5446.h
+++ b/drivers/iio/dac/ad5446.h
@@ -71,6 +71,8 @@ struct ad5446_chip_info {
 enum ad5446_supported_device_ids {
         ID_AD5444,
         ID_AD5446,
+        ID_AD5450,
+        ID_AD5451,
         ID_AD5541A,
         ID_AD5512A,
         ID_AD5553,