On Wed, 2015-01-14 at 17:08 -0800, Kevin Hilman wrote:
> From: Kevin Hilman <khilman@xxxxxxxxxx>
>
> 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.
I haven't tested whether the sensor values are correct, but based on the
schematics & the hardkernel dts this describes the hardware correctly.
Reviewed-By: Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>
> Cc: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
> Cc: Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>
> Signed-off-by: Kevin Hilman <khilman@xxxxxxxxxx>
> ---
> 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@12C60000 {
> + 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@12C80000 {
> samsung,i2c-sda-delay = <100>;
> samsung,i2c-max-bus-freq = <66000>;
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