dt-bindings: mfd: da9052: Support TSI as ADC
DA9052 allows using the touchscreen input pins as general purpose analogue input pin by wiring analogue inputs to X+, X-, Y+ and Y- and providing a reference voltage at TSIREF pin. Signed-off-by: NSebastian Reichel <sebastian.reichel@collabora.co.uk> Acked-by: NRob Herring <robh@kernel.org> Signed-off-by: NLee Jones <lee.jones@linaro.org>
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