config/devterm.nix

@@ -10,11 +10,13 @@
   networking.hostName = "devterm";
   imports = [
     ./desktop.nix
+    "${nixos-hardware}/raspberry-pi/4/pkgs-overlays.nix"
   ];
   boot.loader = {
     grub.enable = lib.mkDefault false;
     generic-extlinux-compatible.enable = lib.mkDefault true;
   };
+  hardware.raspberry-pi."4".apply-overlays-dtmerge.enable = true;
   boot.initrd = {
     includeDefaultModules = false;
     availableKernelModules = [
@@ -54,7 +56,7 @@
   };
   networking.networkmanager.enable = true;
   users.users.darkkirb.extraGroups = ["networkmanager"];
-  hardware.deviceTree.filter = "*rpi*.dtb";
+  hardware.deviceTree.filter = "bcm2711-rpi-cm4.dtb";
   hardware.deviceTree.overlays = [
     {
       name = "dwc2";
@@ -64,6 +66,10 @@
       name = "cma";
       dtsFile = ./devterm/cma-overlay.dts;
     }
+    {
+      name = "i2c0-overlay";
+      dtsFile = ./devterm/i2c0-overlay.dts;
+    }
     {
       name = "vc4-kms-v3d-pi4";
       dtsFile = ./devterm/vc4-kms-v3d-pi4-overlay.dts;

config/devterm/devterm-overlay.dts

@@ -113,14 +113,14 @@
 			status = "okay";
 		};
 	};
-	fragment@18 {
+	/*fragment@18 {
 		target = <&audio>;
 		__overlay__ {
 			brcm,disable-headphones = <0x00>;
 			status = "okay";
 			bcrm,disable-hdmi;
 		};
-	};
+	};*/
 	fragment@19 {
 		target-path = "/chosen";
 		__overlay__ {

config/devterm/i2c0-overlay.dts

@@ -0,0 +1,83 @@
+/dts-v1/;
+/plugin/;
+
+/{
+	compatible = "brcm,bcm2711";
+	
+	fragment@0 {
+		target = <&i2c0if>;
+		__overlay__ {
+			status = "okay";
+			pinctrl-names = "default";
+			pinctrl-0 = <&i2c0_pins>;
+		};
+	};
+	
+	fragment@1 {
+		target = <&i2c0_pins>;
+		pins1: __overlay__ {
+			brcm,pins = <0 1>;
+			brcm,function = <4>; /* alt0 */
+		};
+	};
+	
+	fragment@2 {
+		target = <&i2c0_pins>;
+		pins2: __dormant__ {
+			brcm,pins = <28 29>;
+			brcm,function = <4>; /* alt0 */
+		};
+	};
+	
+	fragment@3 {
+		target = <&i2c0_pins>;
+		pins3: __dormant__ {
+			brcm,pins = <44 45>;
+			brcm,function = <5>; /* alt1 */
+		};
+	};
+	
+	fragment@4 {
+		target = <&i2c0_pins>;
+		pins4: __dormant__ {
+			brcm,pins = <46 47>;
+			brcm,function = <4>; /* alt0 */
+		};
+	};
+	
+	fragment@5 {
+		target = <&i2c0>;
+		__dormant__ {
+			compatible = "brcm,bcm2708-i2c";
+		};
+	};
+	
+	fragment@6 {
+		target = <&i2c0mux>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+	
+	fragment@7 {
+		target-path = "/aliases";
+		__overlay__ {
+			i2c0 = "/soc/i2c@7e205000";
+		};
+	};
+	
+	fragment@8 {
+		target-path = "/__symbols__";
+		__overlay__ {
+			i2c0 = "/soc/i2c@7e205000";
+		};
+	};
+	
+	__overrides__ {
+		pins_0_1   = <0>,"+1-2-3-4";
+		pins_28_29 = <0>,"-1+2-3-4";
+		pins_44_45 = <0>,"-1-2+3-4";
+		pins_46_47 = <0>,"-1-2-3+4";
+		combine = <0>, "!5";
+	};
+};

config/devterm/spi0-overlay.dts

@@ -1,7 +1,7 @@
 /dts-v1/;
 /plugin/;
 / {
-	compatible = "bcrm,bcm2711";
+	compatible = "brcm,bcm2711";
 	fragment@0 {
 		target = <&spi>;
 		__overlay__ {

config/devterm/vc4-kms-v3d-pi4-overlay.dts

@@ -1,4 +1,7 @@
-// SPDX-License-Identifier: GPL-2.0
+/*
+* vc4-fkms-v3d-overlay.dts
+*/
+
 /dts-v1/;
 /plugin/;
 
@@ -15,7 +18,7 @@
 	fragment@2 {
 		target = <&firmwarekms>;
 		__overlay__  {
-			status = "disabled";
+			status = "okay";
 		};
 	};
 	
@@ -32,4 +35,10 @@
 			status = "okay";
 		};
 	};
+	fragment@5 {
+		target-path = "/chosen";
+		__overlay__  {
+			bootargs = "clk_ignore_unused";
+		};
+	};
 };

packages/linux/devterm/devterm.json

@@ -1,12 +0,0 @@
-{
-  "url": "https://github.com/clockworkpi/DevTerm.git",
-  "rev": "9a0598e0877f4bdca207074b2c0e7cb229d290f0",
-  "date": "2024-06-10T08:02:03-07:00",
-  "path": "/nix/store/nwfg32dz37g5dmnd5xvcsmp9wh7jq0qq-DevTerm",
-  "sha256": "1461vicaqnnvfczgxzvq8chkcjk2l178n668dixyx6kfp7rf0b31",
-  "hash": "sha256-YSzg8rlumu57bMgYi06gYko2IUN4//4+c9tarFjcwZA=",
-  "fetchLFS": false,
-  "fetchSubmodules": false,
-  "deepClone": false,
-  "leaveDotGit": false
-}

packages/linux/devterm/devterm.nix

@@ -1,8 +0,0 @@
-{fetchFromGitHub}: let
-  source = builtins.fromJSON (builtins.readFile ./devterm.json);
-in
-  fetchFromGitHub {
-    owner = "clockworkpi";
-    repo = "DevTerm";
-    inherit (source) rev sha256;
-  }

packages/linux/devterm/kernel-source.nix

@@ -1,8 +0,0 @@
-{fetchFromGitHub}: let
-  source = builtins.fromJSON (builtins.readFile ./kernel.json);
-in
-  fetchFromGitHub {
-    owner = "raspberrypi";
-    repo = "linux";
-    inherit (source) rev sha256;
-  }

packages/linux/devterm/kernel.json

@@ -1,12 +0,0 @@
-{
-    "url": "https://github.com/raspberrypi/linux",
-    "rev": "3a33f11c48572b9dd0fecac164b3990fc9234da8",
-    "date": "2021-04-29T20:34:42+01:00",
-    "path": "/nix/store/g3cawyxkjchyhz4860d92ql0p6hj2gvj-linux-3a33f11",
-    "sha256": "154aicn2cd4a6kpnifcb899px6jijg2abavjm3y4w5lfwpipmqck",
-    "hash": "sha256-k+F64+WOFk78qHKrpcSTUZp+U0KLuWjvNIo0JiyLipQ=",
-    "fetchLFS": false,
-    "fetchSubmodules": false,
-    "deepClone": false,
-    "leaveDotGit": false
-}

packages/linux/devterm/kernel.nix

@@ -2,21 +2,22 @@
   callPackage,
   buildLinux,
   lib,
+  linuxKernel,
   ...
-} @ args: let
-  devterm = callPackage ./devterm.nix {};
-in
+} @ args:
 buildLinux (
   args
   // {
-      src = callPackage ./kernel-source.nix {};
-      version = "5.10.17-v8";
+    src = linuxKernel.packages.linux_rpi4.kernel.src;
+    version = linuxKernel.packages.linux_rpi4.kernel.modDirVersion + "-v8";
     defconfig = "bcm2711_defconfig";
     autoModules = false;
-      kernelPatches = [
+    kernelPatches =
+      linuxKernel.packages.linux_rpi4.kernel.kernelPatches
+      ++ [
         {
           name = "devterm";
-          patch = "${devterm}/Code/patch/cm4/cm4_kernel_0704.patch";
+          patch = ./linux-devterm.patch;
           extraStructuredConfig = with lib.kernel; {
             AXP20X_ADC = module;
             AXP20X_POWER = module;
@@ -33,11 +34,6 @@ in
             FW_LOADER_COMPRESS = yes;
           };
         }
-        {
-          name = "subcmd-util";
-          patch = ./subcmd-util.patch;
-          extraConfig = "";
-        }
       ];
     enableCommonConfig = false;
   }

packages/linux/devterm/subcmd-util.patch

@@ -1,29 +0,0 @@
-
----
- tools/lib/subcmd/subcmd-util.h | 9 ++++-----
- 1 file changed, 4 insertions(+), 5 deletions(-)
-
-diff --git a/tools/lib/subcmd/subcmd-util.h b/tools/lib/subcmd/subcmd-util.h
-index 794a375dad36..7009fc176636 100644
---- a/tools/lib/subcmd/subcmd-util.h
-+++ b/tools/lib/subcmd/subcmd-util.h
-@@ -49,13 +49,12 @@ static NORETURN inline void die(const char *err, ...)
-
- static inline void *xrealloc(void *ptr, size_t size)
- {
--	void *ret = realloc(ptr, size);
--	if (!ret && !size)
--		ret = realloc(ptr, 1);
-+	void *ret;
-+	if (!size)
-+		size = 1;
-+	ret = realloc(ptr, size);
- 	if (!ret) {
- 		ret = realloc(ptr, size);
--		if (!ret && !size)
--			ret = realloc(ptr, 1);
- 		if (!ret)
- 			die("Out of memory, realloc failed");
- 	}
--- 
-2.34.1