Revert "starfive visionfive2: use mainline kernel"

This reverts commit 413452614f.

starfive/visionfive/v2/default.nix

@@ -1,7 +1,12 @@
 { config, lib, pkgs, ... }: {
   boot = {
+    # Force no ZFS (from nixos/modules/profiles/base.nix) until updated to kernel 6.0
+    supportedFilesystems =
+      lib.mkForce [ "btrfs" "reiserfs" "vfat" "f2fs" "xfs" "ntfs" "cifs" ];
     consoleLogLevel = lib.mkDefault 7;
-    kernelPackages = lib.mkDefault pkgs.linuxPackages_latest;
+    kernelPackages = lib.mkDefault (pkgs.callPackage ./linux-6.6.nix {
+      inherit (config.boot) kernelPatches;
+    });
 
     kernelParams =
       lib.mkDefault [ "console=tty0" "console=ttyS0,115200n8" "earlycon=sbi" ];

starfive/visionfive/v2/linux-6.6.nix

@@ -0,0 +1,26 @@
+{ lib, callPackage, linuxPackagesFor, kernelPatches, ... }:
+
+let
+  modDirVersion = "6.6.0";
+  linuxPkg = { lib, fetchFromGitHub, buildLinux, ... }@args:
+    buildLinux (args // {
+      version = "${modDirVersion}-starfive-visionfive2";
+
+      src = fetchFromGitHub {
+        owner = "starfive-tech";
+        repo = "linux";
+        rev = "13eb70da2a73187c8c7aece13d23d68928aa8210";
+        hash = "sha256-bwB7Pc+Z+MWXPfWYdgtRGuhqjiNHLDGNCY62e4lBGvE=";
+      };
+
+      inherit modDirVersion kernelPatches;
+
+      structuredExtraConfig = with lib.kernel; {
+        PINCTRL_STARFIVE_JH7110_SYS = yes;
+        SERIAL_8250_DW = yes;
+      };
+
+      extraMeta.branch = "JH7110_VisionFive2_upstream";
+    } // (args.argsOverride or { }));
+
+in lib.recurseIntoAttrs (linuxPackagesFor (callPackage linuxPkg { }))