Add PAC1934 support in order to monitor the board power consumption.
Device is connected on flexcom7 in twi mode.

[root@SAM9X75 ~]$ awk -f pac1934.awk
VDD3V3 current:   10.675 mA, voltage: 3295.41 mV
VDDOUT4 current:  5.7625 mA, voltage: 1196.78 mV
VDDCORE current: 115.442 mA, voltage: 1243.65 mV
VDDIODDR current: 29.585 mA, voltage: 1345.21 mV

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
---
 .../dts/microchip/at91-sam9x75_curiosity.dts  | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
index d453800f8e35..76d7a756e08c 100644
--- a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
@@ -198,6 +198,52 @@ regulator-state-standby {
 	};
 };
 
+&flx7 {
+	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
+	status = "okay";
+};
+
+&i2c7 {
+	dmas = <0>, <0>;
+	i2c-analog-filter;
+	i2c-digital-filter;
+	i2c-digital-filter-width-ns = <35>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_flx7_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 = <10000>;
+			label = "VDD3V3";
+		};
+
+		channel@2 {
+			reg = <0x2>;
+			shunt-resistor-micro-ohms = <10000>;
+			label = "VDDOUT4";
+		};
+
+		channel@3 {
+			reg = <0x3>;
+			shunt-resistor-micro-ohms = <10000>;
+			label = "VDDCORE";
+		};
+
+		channel@4 {
+			reg = <0x4>;
+			shunt-resistor-micro-ohms = <10000>;
+			label = "VDDIODDR";
+		};
+	};
+};
+
 &i2s {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_i2s_default>;
@@ -231,6 +277,12 @@ pinctrl_flx6_default: flx6-default {
 				<AT91_PIOA 24 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
 				<AT91_PIOA 25 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
 		};
+
+		pinctrl_flx7_default: flx7-default {
+			atmel,pins =
+				<AT91_PIOC 0 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>,
+				<AT91_PIOC 1 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>;
+		};
 	};
 
 	gpio-keys {
-- 
2.47.0

Hi, Mihai,

On 22.11.2024 10:05, Mihai Sain wrote:
> Add PAC1934 support in order to monitor the board power consumption.
> Device is connected on flexcom7 in twi mode.
> 
> [root@SAM9X75 ~]$ awk -f pac1934.awk
> VDD3V3 current:   10.675 mA, voltage: 3295.41 mV
> VDDOUT4 current:  5.7625 mA, voltage: 1196.78 mV
> VDDCORE current: 115.442 mA, voltage: 1243.65 mV
> VDDIODDR current: 29.585 mA, voltage: 1345.21 mV
> 
> Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
> ---
>  .../dts/microchip/at91-sam9x75_curiosity.dts  | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
> index d453800f8e35..76d7a756e08c 100644
> --- a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
> +++ b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
> @@ -198,6 +198,52 @@ regulator-state-standby {
>  	};
>  };
>  
> +&flx7 {
> +	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
> +	status = "okay";
> +};
> +
> +&i2c7 {
> +	dmas = <0>, <0>;
> +	i2c-analog-filter;
> +	i2c-digital-filter;
> +	i2c-digital-filter-width-ns = <35>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_flx7_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 = <10000>;
> +			label = "VDD3V3";
> +		};
> +
> +		channel@2 {
> +			reg = <0x2>;
> +			shunt-resistor-micro-ohms = <10000>;
> +			label = "VDDOUT4";

On the schematics at [1] this seems to be named DCDC4. Is there a mistake
on [1] or this patch needs adjustments? If so, I can do it while applying.

Thank you,
Claudiu

[1]
https://ww1.microchip.com/downloads/aemDocuments/documents/MPU32/ProductDocuments/UserGuides/SAM9X75-Curiosity-User-Guide-DS60001859.pdf

> +		};
> +
> +		channel@3 {
> +			reg = <0x3>;
> +			shunt-resistor-micro-ohms = <10000>;
> +			label = "VDDCORE";
> +		};
> +
> +		channel@4 {
> +			reg = <0x4>;
> +			shunt-resistor-micro-ohms = <10000>;
> +			label = "VDDIODDR";
> +		};
> +	};
> +};
> +
>  &i2s {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_i2s_default>;
> @@ -231,6 +277,12 @@ pinctrl_flx6_default: flx6-default {
>  				<AT91_PIOA 24 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
>  				<AT91_PIOA 25 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
>  		};
> +
> +		pinctrl_flx7_default: flx7-default {
> +			atmel,pins =
> +				<AT91_PIOC 0 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>,
> +				<AT91_PIOC 1 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>;
> +		};
>  	};
>  
>  	gpio-keys {