if acpi is available, check for the ps/2 devices and only add them if present.

arch/all-pc/hidds/i8042/i8042_acpi.c

@@ -0,0 +1,72 @@
+/*
+    Copyright (C) 2023, The AROS Development Team. All rights reserved.
+*/
+
+#include <aros/debug.h>
+
+#include <aros/symbolsets.h>
+#include <proto/exec.h>
+#include <proto/oop.h>
+#include <proto/utility.h>
+#include <proto/acpica.h>
+
+#include <acpica/acnames.h>
+#include <acpica/accommon.h>
+
+#include <string.h>
+#include <stdio.h>
+
+#include LC_LIBDEFS_FILE
+
+static ACPI_STATUS ACPIFoundCallback(ACPI_HANDLE handle, ULONG nesting_level,
+    void *context, void **return_value)
+{
+    IPTR *found = (IPTR *)return_value;
+
+    D(bug("[i8042:ACPI] %s()\n", __func__));
+
+    *found = *found + 1;
+
+    return AE_OK;
+}
+
+
+static int init_i8042acpi(LIBBASETYPEPTR lh)
+{
+    struct Library *ACPICABase;
+
+    D(bug("[i8042:ACPI] %s()\n", __func__));
+
+    /*
+     * If we have ACPI - check if the PS/2 devices are available.
+     */
+
+    ACPICABase = OpenLibrary("acpica.library", 0);
+    if (ACPICABase)
+    {
+        ACPI_STATUS status;
+        IPTR devicesfound = 0;
+
+        status = AcpiGetDevices("PNP0303", ACPIFoundCallback, NULL, (void **)&devicesfound);
+        if (ACPI_FAILURE(status)) {
+            D(bug("[i8042:ACPI] %s: No PNP0303 PS/2 Keyboard found\n", __func__);)
+        }
+        status = AcpiGetDevices("PNP0F03", ACPIFoundCallback, NULL, (void **)&devicesfound);
+        if (ACPI_FAILURE(status)) {
+            D(bug("[i8042:ACPI] %s: No PNP0F03 PS/2 Mouse found\n", __func__);)
+        }
+
+        if (devicesfound)
+        {
+            D(bug("[i8042:ACPI] %s: Found %u PS/2 device(s)\n", __func__, devicesfound);)
+        }
+        CloseLibrary(ACPICABase);
+        return (devicesfound != 0) ? TRUE  : FALSE;
+    }
+
+    return TRUE;
+
+    ReturnInt("HIDD::Init", ULONG, TRUE);
+}
+
+ADD2INITLIB(init_i8042acpi, 0)

arch/all-pc/hidds/i8042/mmakefile.src

@@ -0,0 +1,19 @@
+
+include $(SRCDIR)/config/aros.cfg
+
+FILES := i8042_acpi
+
+USER_CPPFLAGS := -DAROS_USE_OOP \
+               -D__OOP_NOLIBBASE__ \
+               -D__OOP_NOATTRBASES__ \
+               -D__OOP_NOMETHODBASES__ \
+               -D__UTILITY_NOLIBBASE__ \
+               -D__INLINE_ACPICA_STACKCALL__ 
+
+USER_LDFLAGS := -static
+USER_INCLUDES := -I$(SRCDIR)/$(CURDIR) -I$(SRCDIR)/rom/hidds/i8042
+
+%build_archspecific \
+  mainmmake=kernel-hidd-i8042 maindir=rom/hidds/i8042 \
+  arch=pc modname=i8042 \
+  files="$(FILES)"