iio: dac: ti-dac5571: add support for ti,dac121c081

It fits right in as a single 12-bit DAC.
Reviewed-by: Sean Nyekjaer <sean@geanix.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
Link: https://lore.kernel.org/r/a09a49a5-3d01-21f7-02ed-b191d70e7609@axentia.seSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/dac/Kconfig

@@ -416,7 +416,7 @@ config TI_DAC5571
 	help
 	  Driver for the Texas Instruments
 	  DAC5571, DAC6571, DAC7571, DAC5574, DAC6574, DAC7574, DAC5573,
-	  DAC6573, DAC7573, DAC8571, DAC8574.
+	  DAC6573, DAC7573, DAC8571, DAC8574, DAC121C081.
 
 	  If compiled as a module, it will be called ti-dac5571.
 

drivers/iio/dac/ti-dac5571.c

@@ -13,6 +13,7 @@
  * https://www.ti.com/lit/ds/symlink/dac5573.pdf
  * https://www.ti.com/lit/ds/symlink/dac6573.pdf
  * https://www.ti.com/lit/ds/symlink/dac7573.pdf
+ * https://www.ti.com/lit/ds/symlink/dac121c081.pdf
  */
 
 #include <linux/iio/iio.h>
@@ -402,6 +403,7 @@ static const struct of_device_id dac5571_of_id[] = {
 	{.compatible = "ti,dac5573", .data = (void *)quad_8bit},
 	{.compatible = "ti,dac6573", .data = (void *)quad_10bit},
 	{.compatible = "ti,dac7573", .data = (void *)quad_12bit},
+	{.compatible = "ti,dac121c081", .data = (void *)single_12bit},
 	{}
 };
 MODULE_DEVICE_TABLE(of, dac5571_of_id);
@@ -416,6 +418,7 @@ static const struct i2c_device_id dac5571_id[] = {
 	{"dac5573", quad_8bit},
 	{"dac6573", quad_10bit},
 	{"dac7573", quad_12bit},
+	{"dac121c081", single_12bit},
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, dac5571_id);