[PATCH linux dev-4.17] ARM: dts: aspeed: romulus: Enable iio-hwmon-battery

[Lei YU]

Add iio-hwmon-battery using adc channel 12;
Pull GPIOR3 high to enable RTC_ADC;
Enable adc to make adc running.

Signed-off-by: Lei YU <mine260309 at gmail.com>
---
 arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts b/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts
index 852b552..461564c 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-romulus.dts
@@ -83,6 +83,11 @@
 			linux,code = <ASPEED_GPIO(Q, 7)>;
 		};
 	};
+
+	iio-hwmon-battery {
+		compatible = "iio-hwmon";
+		io-channels = <&adc 12>;
+	};
 };
 
 #include "ibm-power9-cfam.dtsi"
@@ -236,6 +241,12 @@
 		output-low;
 		line-name = "seq_cont";
 	};
+	rtc_adc_en {
+		gpio-hog;
+		gpios = <ASPEED_GPIO(R, 3) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "rtc_adc_en";
+	};
 };
 
 &vuart {
@@ -304,3 +315,7 @@
 	status = "okay";
 };
 
+&adc {
+	status = "okay";
+};
+
-- 
2.7.4