rpi4 overlay workaround

systems/NObangers.nix

@@ -46,16 +46,82 @@
     deviceTree = {
       enable = true;
       filter = "*rpi-4-*.dtb";
-      ]
     };
   };
-  hardware.deviceTree.overlays = [{
-    name = hifiberry-dacplusadc";
-    dtsText = ''
 
-    ''
+  hardware.deviceTree.overlays = [{
-  }
+    name = "hifiberry-dacplusadc";
-  ];
+    dtsText = ''
+      // Definitions for HiFiBerry DAC+
+      /dts-v1/;
+      /plugin/;
+
+      / {
+      	compatible = "brcm,bcm2711";
+
+      	fragment@0 {
+      		target-path = "/";
+      		__overlay__ {
+      			dacpro_osc: dacpro_osc {
+      				compatible = "hifiberry,dacpro-clk";
+      				#clock-cells = <0>;
+      			};
+      		};
+      	};
+
+      	frag1: fragment@1 {
+      		target = <&i2s_clk_consumer>;
+      		__overlay__ {
+      			status = "okay";
+      		};
+      	};
+
+      	fragment@2 {
+      		target = <&i2c1>;
+      		__overlay__ {
+      			#address-cells = <1>;
+      			#size-cells = <0>;
+      			status = "okay";
+
+      			pcm5122@4d {
+      				#sound-dai-cells = <0>;
+      				compatible = "ti,pcm5122";
+      				reg = <0x4d>;
+      				clocks = <&dacpro_osc>;
+      				AVDD-supply = <&vdd_3v3_reg>;
+      				DVDD-supply = <&vdd_3v3_reg>;
+      				CPVDD-supply = <&vdd_3v3_reg>;
+      				status = "okay";
+      			};
+      			hpamp: hpamp@60 {
+      				compatible = "ti,tpa6130a2";
+      				reg = <0x60>;
+      				status = "disabled";
+      			};
+      		};
+      	};
+
+      	fragment@3 {
+      		target = <&sound>;
+      		hifiberry_dacplus: __overlay__ {
+      			compatible = "hifiberry,hifiberry-dacplus";
+      			i2s-controller = <&i2s_clk_consumer>;
+      			status = "okay";
+      		};
+      	};
+
+      	__overrides__ {
+      		24db_digital_gain =
+      			<&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
+      		slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?",
+      			<&frag1>,"target:0=",<&i2s_clk_producer>,
+      			<&hifiberry_dacplus>,"i2s-controller:0=",<&i2s_clk_producer>;
+
+      		leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
+      	};
+      };
+    '';
+  }];
 
   nixpkgs.hostPlatform = "aarch64-linux";
   system.stateVersion = "23.11";