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dt-bindings: adc: ltc2497: add support for ltc2305

Add documentation for the 2-channel LTC2305 ADC in the
existing ltc2497 binding.
This enables automatic device tree matching for LTC2305
while using the LTC2309 driver (drivers/iio/adc/ltc2309.c),
since both ADCs share the same I2C interface and 12-bit SAR architecture.
The main difference is the number of channels (LTC2305: 2, LTC2309: 8).

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Kyle Hsieh <kylehsieh1995@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

authored by

Kyle Hsieh and committed by
Jonathan Cameron 732df35b 2f5bdca1

+7
+7
Documentation/devicetree/bindings/iio/adc/lltc,ltc2497.yaml
··· 11 11 - Liam Beguin <liambeguin@gmail.com> 12 12 13 13 description: | 14 + LTC2305: 15 + low noise, low power, 2-channel, 12-bit successive approximation ADC with an 16 + I2C compatible serial interface. 17 + 18 + https://www.analog.com/media/en/technical-documentation/data-sheets/23015fb.pdf 19 + 14 20 LTC2309: 15 21 low noise, low power, 8-channel, 12-bit successive approximation ADC with an 16 22 I2C compatible serial interface. ··· 34 28 properties: 35 29 compatible: 36 30 enum: 31 + - lltc,ltc2305 37 32 - lltc,ltc2309 38 33 - lltc,ltc2497 39 34 - lltc,ltc2499