[PATCH v2 3/4] dt-bindings: iio: adc: ltc2497: Add LTC2305 compatible

[Carlos Jones Jr <carlosjr.jones@analog.com>]

Add device tree binding for the LTC2305, a 2-channel, 12-bit SAR ADC
from Linear Technology (now part of Analog Devices).

The LTC2305 uses the same I2C register interface as the LTC2309 but
differs in:
- Channel count: 2 channels vs 8 channels (LTC2309)
- Conversion timing: Requires 1.6μs settling time vs negligible for
  LTC2309

Signed-off-by: Carlos Jones Jr <carlosjr.jones@analog.com>
---
 .../devicetree/bindings/iio/adc/lltc,ltc2497.yaml        | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/lltc,ltc2497.yaml b/Documentation/devicetree/bindings/iio/adc/lltc,ltc2497.yaml
index 5cc6a9684077..b246d492950e 100644
--- a/Documentation/devicetree/bindings/iio/adc/lltc,ltc2497.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/lltc,ltc2497.yaml
@@ -4,13 +4,19 @@
 $id: http://devicetree.org/schemas/iio/adc/lltc,ltc2497.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Linear Technology / Analog Devices LTC2497 and LTC2309 ADC
+title: Linear Technology / Analog Devices LTC2497 and similar ADCs
 
 maintainers:
   - Michael Hennerich <michael.hennerich@analog.com>
   - Liam Beguin <liambeguin@gmail.com>
 
 description: |
+  LTC2305:
+    low noise, low power, 2-channel, 12-bit successive approximation ADC with an
+    I2C compatible serial interface.
+
+    https://www.analog.com/media/en/technical-documentation/data-sheets/2305fa.pdf
+
   LTC2309:
     low noise, low power, 8-channel, 12-bit successive approximation ADC with an
     I2C compatible serial interface.
@@ -28,6 +34,7 @@ description: |
 properties:
   compatible:
     enum:
+      - lltc,ltc2305
       - lltc,ltc2309
       - lltc,ltc2497
       - lltc,ltc2499
-- 
2.43.0