linux-kernel - [PATCH 2/2] ARM: dts: microchip: sama7d65

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Message-ID: <20250211143302.4102-3-mihai.sain@microchip.com>
Date: Tue, 11 Feb 2025 16:33:02 +0200
From: Mihai Sain <mihai.sain@...rochip.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: Mihai Sain <mihai.sain@...rochip.com>
Subject: [PATCH 2/2] ARM: dts: microchip: sama7d65_curiosity: Add power monitor support

Add PAC1934 support in order to monitor the board power consumption.
Device is connected on flexcom10 in twi mode.

[root@...A7D65 ~]$ awk -f pac1934.awk
VDD3V3   current: 146.173 mA, voltage: 3302.73 mV
VDDIODDR current: 62.1356 mA, voltage: 1353.96 mV
VDDCORE  current: 242.248 mA, voltage: 1204.36 mV
VDDCPU   current: 213.565 mA, voltage: 1303.05 mV

Signed-off-by: Mihai Sain <mihai.sain@...rochip.com>
---
 .../dts/microchip/at91-sama7d65_curiosity.dts | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
index 0f86360fb733..8d826ec4c66c 100644
--- a/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dts
@@ -43,6 +43,52 @@ &uart6 {
 	status = "okay";
 };
 
+&flx10 {
+	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
+	status = "okay";
+};
+
+&i2c10 {
+	dmas = <0>, <0>;
+	i2c-analog-filter;
+	i2c-digital-filter;
+	i2c-digital-filter-width-ns = <35>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c10_default>;
+	status = "okay";
+
+	power-monitor@10 {
+		compatible = "microchip,pac1934";
+		reg = <0x10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		channel@1 {
+			reg = <0x1>;
+			shunt-resistor-micro-ohms = <47000>;
+			label = "VDD3V3";
+		};
+
+		channel@2 {
+			reg = <0x2>;
+			shunt-resistor-micro-ohms = <47000>;
+			label = "VDDIODDR";
+		};
+
+		channel@3 {
+			reg = <0x3>;
+			shunt-resistor-micro-ohms = <47000>;
+			label = "VDDCORE";
+		};
+
+		channel@4 {
+			reg = <0x4>;
+			shunt-resistor-micro-ohms = <47000>;
+			label = "VDDCPU";
+		};
+	};
+};
+
 &main_xtal {
 	clock-frequency = <24000000>;
 };
@@ -75,6 +121,12 @@ pinctrl_uart6_default: uart6-default {
 			 <PIN_PD19__FLEXCOM6_IO1>;
 		bias-disable;
 	};
+
+	pinctrl_i2c10_default: i2c10-default{
+		pinmux = <PIN_PB19__FLEXCOM10_IO1>,
+			 <PIN_PB20__FLEXCOM10_IO0>;
+		bias-pull-up;
+	};
 };
 
 &sdmmc1 {
-- 
2.48.1