linux-kernel - [PATCH v2] ARM: dts: exynos5422-odroidxu3: add on-board INA231 sensors

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Message-Id: <1421284089-421-1-git-send-email-khilman@kernel.org>
Date:	Wed, 14 Jan 2015 17:08:09 -0800
From:	Kevin Hilman <khilman@...nel.org>
To:	Kukjin Kim <kgene.kim@...sung.com>,
	linux-samsung-soc@...r.kernel.org
Cc:	linaro-kernel@...ts.linaro.org,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Kukjin Kim <kgene@...nel.org>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND...),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM PORT),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2] ARM: dts: exynos5422-odroidxu3: add on-board INA231 sensors

From: Kevin Hilman <khilman@...aro.org>

The odroid-xu3 has 4 INA231 current sensors on board which can be
accessed from the Linux via the hwmon interface.

There is one sensor for each of these power rails:

- A15 cluster: VDD_ARM
- A7 cluster: VDD_KFC
- GPU: VDD_G3D
- memory: VDD_MEM

In addition to adding the sensors, LDO26 from the PMIC needs to be
enabled because it's powering these sensor.

Cc: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc: Sjoerd Simons <sjoerd.simons@...labora.co.uk>
Signed-off-by: Kevin Hilman <khilman@...aro.org>
---
v2: use "ti,ina231" as compatible string.

Applies on top of "ARM: dts: Add dts file for odroid XU3 board" from Sjoerd Simons.

 arch/arm/boot/dts/exynos5422-odroidxu3.dts | 39 ++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3.dts b/arch/arm/boot/dts/exynos5422-odroidxu3.dts
index c29123c0734d..50353d023225 100644
--- a/arch/arm/boot/dts/exynos5422-odroidxu3.dts
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3.dts
@@ -174,6 +174,13 @@
 					regulator-always-on;
 				};
 
+				ldo26_reg: LDO26 {
+					regulator-name = "vdd_ldo26";
+					regulator-min-microvolt = <3000000>;
+					regulator-max-microvolt = <3000000>;
+					regulator-always-on;
+				};
+
 				buck1_reg: BUCK1 {
 					regulator-name = "vdd_mif";
 					regulator-min-microvolt = <800000>;
@@ -257,6 +264,38 @@
 		};
 	};
 
+	i2c_0: i2c@...60000 {
+		status = "okay";
+
+		/* A15 cluster: VDD_ARM */
+		ina231@40 {
+			compatible = "ti,ina231";
+			reg = <0x40>;
+			shunt-resistor = <10000>;
+		};
+
+		/* memory: VDD_MEM */
+		ina231@41 {
+			compatible = "ti,ina231";
+			reg = <0x41>;
+			shunt-resistor = <10000>;
+		};
+
+		/* GPU: VDD_G3D */
+		ina231@44 {
+			compatible = "ti,ina231";
+			reg = <0x44>;
+			shunt-resistor = <10000>;
+		};
+
+		/* A7 cluster: VDD_KFC */
+		ina231@45 {
+			compatible = "ti,ina231";
+			reg = <0x45>;
+			shunt-resistor = <10000>;
+		};
+	};
+
 	i2c_2: i2c@...80000 {
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-max-bus-freq = <66000>;
-- 
2.1.3

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