[PATCH] arm64: dts: freescale: imx93-phyboard-nash: Add current sense amplifier

[Primoz Fiser]

There is a current sensing circuitry on the phyBOARD-Nash-i.MX93 capable
of measuring input current consumption of the phyCORE-i.MX93 SoM @ 3.3V.
Circuity consists of MAX4372 current-sense amplifier (50V/V) with two 70
mOhm shunts resistors in parallel configuration (effective R = 35 mOhm)
connected to the SoC internal 12-bit ADC channel #1 (Vref = 1.8V) via
voltage divider with ratio of 1/2. This results in a current scaling
factor of 0.502232142 mA/LSB.

Signed-off-by: Primoz Fiser <primoz.fiser at norik.com>
---
 arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts b/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts
index 00143f201876..8de7e174976f 100644
--- a/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-phyboard-nash.dts
@@ -28,6 +28,14 @@ chosen {
 		stdout-path = &lpuart1;
 	};
 
+	current-sense {
+		compatible = "current-sense-amplifier";
+		io-channels = <&adc1 1>;
+		sense-gain-div = <2>;
+		sense-gain-mult = <50>;
+		sense-resistor-micro-ohms = <35000>;
+	};
+
 	flexcan1_tc: can-phy0 {
 		compatible = "ti,tcan1042";
 		#phy-cells = <0>;
-- 
2.34.1