ARM: dts: Add ADC and themistor nodes for exynos4412-trats2

This patch use ADC to get the temperature of SoC/battery by using NTC thermistor
driver in hwmon. NTC thermistor driver covnvert ADC's raw data to temperature
by using following variables:

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 4f851ccf40eb..322850640f43 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -106,6 +106,11 @@
                 };
         };
 
+        adc: adc@126C0000 {
+                vdd-supply = <&ldo3_reg>;
+                status = "okay";
+        };
+
         i2c@13890000 {
                 samsung,i2c-sda-delay = <100>;
                 samsung,i2c-slave-addr = <0x10>;
@@ -589,4 +594,20 @@
                         };
                 };
         };
+
+        thermistor-ap@0 {
+                compatible = "ntc,ncp15wb473";
+                pullup-uv = <1800000>;   /* VCC_1.8V_AP */
+                pullup-ohm = <100000>;   /* 100K */
+                pulldown-ohm = <100000>; /* 100K */
+                io-channels = <&adc 1>;  /* AP temperature */
+        };
+
+        thermistor-battery@1 {
+                compatible = "ntc,ncp15wb473";
+                pullup-uv = <1800000>;   /* VCC_1.8V_AP */
+                pullup-ohm = <100000>;   /* 100K */
+                pulldown-ohm = <100000>; /* 100K */
+                io-channels = <&adc 2>;  /* Battery temperature */
+        };
 };