ARM: da850-lego-ev3: Add device tree node for A/DC

[linux-2.6-microblaze.git] / arch / arm / boot / dts / da850-lego-ev3.dts

diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts
index 112ec92..0309537 100644 (file)
--- a/arch/arm/boot/dts/da850-lego-ev3.dts
+++ b/arch/arm/boot/dts/da850-lego-ev3.dts
@@ -139,6 +139,19 @@
                enable-active-high;
                regulator-boot-on;
        };
+
+       /*
+        * This is a simple voltage divider on VCC5V to provide a 2.5V
+        * reference signal to the ADC.
+        */
+       adc_ref: regulator2 {
+               compatible = "regulator-fixed";
+               regulator-name = "adc ref";
+               regulator-min-microvolt = <2500000>;
+               regulator-max-microvolt = <2500000>;
+               regulator-boot-on;
+               vin-supply = <&vcc5v>;
+       };
 };
 
 &pmx_core {
@@ -293,6 +306,14 @@
                        };
                };
        };
+
+       adc: adc@3 {
+               compatible = "ti,ads7957";
+               reg = <3>;
+               #io-channel-cells = <1>;
+               spi-max-frequency = <10000000>;
+               vref-supply = <&adc_ref>;
+       };
 };
 
 &gpio {