acpi: acpipld: add tests to check _PLD methods only on the connectable ports

diff --git a/src/Makefile.am b/src/Makefile.am
index 0beb17f5..1f48fa2d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -56,7 +56,8 @@  fwts_SOURCES = main.c 				\
 	acpi/ac_adapter/ac_adapter.c 		\
 	acpi/acpidump/acpidump.c 		\
 	acpi/acpiinfo/acpiinfo.c 		\
-	acpi/acpitables/acpitables.c 		\
+        acpi/acpipld/acpipld.c                  \
+        acpi/acpitables/acpitables.c 		\
 	sbbr/acpitables/acpitables.c 		\
 	acpi/aest/aest.c				\
 	acpi/apicinstance/apicinstance.c 	\
diff --git a/src/acpi/acpipld/acpipld.c b/src/acpi/acpipld/acpipld.c
new file mode 100644
index 00000000..57462b60
--- /dev/null
+++ b/src/acpi/acpipld/acpipld.c
@@ -0,0 +1,126 @@ 
+/*
+ * Copyright (C) 2024 Canonical
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+#include "fwts.h"
+
+#if defined(FWTS_HAS_ACPI)
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include "fwts_acpi_object_eval.h"
+
+/*
+ *  acpipld_init()
+ *	initialize ACPI
+ */
+static int acpipld_init(fwts_framework *fw)
+{
+	if (fwts_acpi_init(fw) != FWTS_OK) {
+		fwts_log_error(fw, "Cannot initialise ACPI.");
+		return FWTS_ERROR;
+	}
+
+	return FWTS_OK;
+}
+
+/*
+ *  acpipld_deinit
+ *	de-intialize ACPI
+ */
+static int acpipld_deinit(fwts_framework *fw)
+{
+	return fwts_acpi_deinit(fw);
+}
+
+static int acpipld_test1(fwts_framework *fw)
+{
+	fwts_list_link	*item;
+	fwts_list *objects;
+	const size_t name_len = 4;
+	bool failed = false;
+
+	if ((objects = fwts_acpi_object_get_names()) == NULL) {
+		fwts_log_info(fw, "Cannot find any ACPI objects");
+		return FWTS_ERROR;
+	}
+
+	fwts_list_foreach(item, objects) {
+		char *name = fwts_list_data(char *, item);
+		const size_t len = strlen(name);
+
+		if (!strncmp("_PLD", name + len - name_len, name_len)) {
+			fwts_list_link	*item_upc;
+			char *name_cmp;
+			name_cmp = strdup(name);
+			strcpy(name_cmp + len - name_len, "_UPC"); 
+
+			fwts_list_foreach(item_upc, objects) {
+				char *name_upc = fwts_list_data(char *, item_upc);
+				if (!strncmp(name_cmp, name_upc, len)) {
+					ACPI_OBJECT_LIST arg_list;
+					ACPI_BUFFER buf;
+					ACPI_OBJECT *obj;
+					int ret;
+
+					arg_list.Count   = 0;
+					arg_list.Pointer = NULL;
+					ret = fwts_acpi_object_evaluate(fw, name_upc, &arg_list, &buf);
+					if ((ACPI_FAILURE(ret) != AE_OK) || (buf.Pointer == NULL))
+						continue;
+
+					obj = buf.Pointer;
+					if (obj->Package.Elements[0].Integer.Value == 0) {
+						fwts_failed(fw, LOG_LEVEL_MEDIUM,
+							"ACPIPLDExistNotConnectable",
+							"The ACPI method %s exists on the port "
+							"claimed not connectable by the %s.",
+							name, name_upc);
+							failed = true;
+					}
+
+					free(buf.Pointer);
+				}
+			}
+			free(name_cmp);
+		}
+	}
+
+	if (!failed)
+		fwts_passed(fw, "All _PLD methods exist on the port connectable.");
+
+	return FWTS_OK;
+}
+
+static fwts_framework_minor_test acpipld_tests[] = {
+	{ acpipld_test1, "Check the  ACPI _PLD methods exist on the port connectable." },
+	{ NULL, NULL }
+};
+
+static fwts_framework_ops acpipld_ops = {
+	.description = "Check if the  ACPI _PLD methods exist on the port connectable.",
+	.init        = acpipld_init,
+	.deinit      = acpipld_deinit,
+	.minor_tests = acpipld_tests
+};
+
+FWTS_REGISTER("acpipld", &acpipld_ops, FWTS_TEST_ANYTIME, FWTS_FLAG_BATCH | FWTS_FLAG_ACPI)
+
+#endif