ARM: dts: microchip: sam9x75_curiosity: Add power monitor support

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>
Link: https://lore.kernel.org/r/20241122080523.3941-3-mihai.sain@microchip.com
[claudiu.beznea: s/VDDOUT4/DCDC4 to comply with schematics]
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>

diff --git a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
index d453800f8e353b7742cd8a71865a3f8695dfe8e6..1a6a909a5043e69a9c82a8127fe14fbe7d87d539 100644 (file)
--- a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
+++ b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
@@ -198,6 +198,52 @@
        };
 };
 
+&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 = "DCDC4";
+               };
+
+               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 @@
                                <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 {