[PATCH v2 2/3] Documentation: DT: twl-charger: document new iio properties

[Marek Belisko <marek@goldelico.com>]

Document added iio properties to avoid using direct funcion call from twl4030-madc
driver.

Signed-off-by: Marek Belisko <marek@goldelico.com>
---
 Documentation/devicetree/bindings/power/twl-charger.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/twl-charger.txt b/Documentation/devicetree/bindings/power/twl-charger.txt
index 3b4ea1b..54faee6 100644
--- a/Documentation/devicetree/bindings/power/twl-charger.txt
+++ b/Documentation/devicetree/bindings/power/twl-charger.txt
@@ -15,6 +15,9 @@ Required properties:
   - "ti,twl4030-bci"
 - interrupts: two interrupt lines from the TWL SIH (secondary
   interrupt handler) - interrupts 9 and 2.
+- io-channels: Should contain following: <&twl4030_madc 11>
+- io-channel-names: Shoud contains following value:
+* "vac" - ADC channel for measuring the voltage of the external AC charger
 
 Optional properties:
 - ti,bb-uvolt: microvolts for charging the backup battery.
@@ -25,6 +28,8 @@ Examples:
 bci {
    compatible = "ti,twl4030-bci";
    interrupts = <9>, <2>;
+   io-channels = <&twl4030_madc 11>;
+   io-channel-name = "vac";
    ti,bb-uvolt = <3200000>;
    ti,bb-uamp = <150>;
 };
-- 
1.9.1