overlays: i2c-sensor: Add the ad799x ADC family

Add support for the AD799[1,2,3,4,5,7,8,9] ADCs to the i2c-sensor
overlay.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

Author: pelwell

arch/arm/boot/dts/overlays/README

@@ -2421,16 +2421,40 @@ Name:   i2c-sensor
 Info:   Adds support for a number of I2C barometric pressure, temperature,
         light level and chemical sensors on i2c_arm
 Load:   dtoverlay=i2c-sensor,<param>=<val>
-Params: addr                    Set the address for the ADS7828, ADS7830,
-                                ADT7410, AS73211, AS7331, BH1750, BME280,
-                                BME680, BMP280, BMP380, BMP58x, CCS811, DS1621,
-                                HDC100X, HDC3020, JC42, LM75, MCP980x,
+Params: addr                    Set the address for the AD799X, ADS7828,
+                                ADS7830, ADT7410, AS73211, AS7331, BH1750,
+                                BME280, BME680, BMP280, BMP380, BMP58x, CCS811,
+                                DS1621, HDC100X, HDC3020, JC42, LM75, MCP980x,
                                 MPU6050, MPU9250, MS5637, MS5803, MS5805,
                                 MS5837, MS8607, SHT3x, TMP102 or VEML6030.
 
         i2c-bus                 Supports all the standard I2C bus selection
                                 parameters - see "dtoverlay -h i2c-bus"
 
+        ad7991                  Select the Analog Devices AD7991 ADC
+                                Valid addresses 0x28-0x29, default 0x28
+
+        ad7992                  Select the Analog Devices AD7992 ADC
+                                Valid addresses 0x20-0x24, default 0x20
+
+        ad7993                  Select the Analog Devices AD7993 ADC
+                                Valid addresses 0x20-0x24, default 0x20
+
+        ad7994                  Select the Analog Devices AD7994 ADC
+                                Valid addresses 0x20-0x24, default 0x20
+
+        ad7995                  Select the Analog Devices AD7995 ADC
+                                Valid addresses 0x28-0x29, default 0x28
+
+        ad7997                  Select the Analog Devices AD7997 ADC
+                                Valid addresses 0x20-0x24, default 0x20
+
+        ad7998                  Select the Analog Devices AD7998 ADC
+                                Valid addresses 0x20-0x24, default 0x20
+
+        ad7999                  Select the Analog Devices AD7999 ADC
+                                Valid address 0x29 (the default)
+
         ads7828                 Select the TI ADS7828 50kHz 8-channel 12bit ADC
                                 Valid addresses 0x48-0x4b, default 0x48
 

arch/arm/boot/dts/overlays/i2c-sensor-common.dtsi

@@ -864,6 +864,20 @@
 		};
 	};
 
+	fragment@56 {
+		target = <&i2cbus>;
+		__dormant__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			ad799x: ad799x@20 {
+				compatible = "adi,ad799x"; // To be overridden
+				reg = <0x20>;
+			};
+		};
+	};
+
 	fragment@98 {
 		target-path = "/";
 		__dormant__ {
@@ -945,6 +959,14 @@
 		veml3235 = <0>,"+53";
 		tmp117 = <0>,"+54+98";
 		scd4x = <0>,"+55";
+		ad7991 = <0>,"+56", <&ad799x>,"compatible=adi,ad7991", <&ad799x>,"reg:0=0x28";
+		ad7992 = <0>,"+56", <&ad799x>,"compatible=adi,ad7992";
+		ad7993 = <0>,"+56", <&ad799x>,"compatible=adi,ad7993";
+		ad7994 = <0>,"+56", <&ad799x>,"compatible=adi,ad7994";
+		ad7995 = <0>,"+56", <&ad799x>,"compatible=adi,ad7995", <&ad799x>,"reg:0=0x28";
+		ad7997 = <0>,"+56", <&ad799x>,"compatible=adi,ad7997";
+		ad7998 = <0>,"+56", <&ad799x>,"compatible=adi,ad7998";
+		ad7999 = <0>,"+56", <&ad799x>,"compatible=adi,ad7999", <&ad799x>,"reg:0=0x29";
 
 		addr =	<&bme280>,"reg:0", <&bmp280>,"reg:0", <&tmp102>,"reg:0",
 			<&lm75>,"reg:0", <&hdc100x>,"reg:0", <&sht3x>,"reg:0",
@@ -959,7 +981,8 @@
 			<&as7331>,"reg:0", <&adxl345>,"reg:0",
 			<&ads7828>,"reg:0", <&ads7830>,"reg:0",
 			<&adxl355>,"reg:0", <&bmp58x>,"reg:0",
-			<&veml6030>,"reg:0", <&tmp117>,"reg:0";
+			<&veml6030>,"reg:0", <&tmp117>,"reg:0",
+			<&ad799x>,"reg:0";
 		int_pin = <&int_pins>, "brcm,pins:0",
 			<&int_pins>, "reg:0",
 			<&max30102>, "interrupts:0",