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>

diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 4f851cc..3228506 100644 (file)
--- 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 */
+       };
 };