ARM: dts: add on-board INA231 sensors for exynos5422-odroidxu3

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@collabora.co.uk>
Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Reviewed-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3.dts b/arch/arm/boot/dts/exynos5422-odroidxu3.dts
index c29123c0734d..38694a4a5417 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>;
@@ -330,3 +337,35 @@
 &usbdrd_dwc3_1 {
         dr_mode = "otg";
 };
+
+&i2c_0 {
+        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>;
+        };
+};