diff --git a/interface/src/tfm_platform_api.c b/interface/src/tfm_platform_api.c
index b4e1162..9b6f787 100644
--- a/interface/src/tfm_platform_api.c
+++ b/interface/src/tfm_platform_api.c
@@ -1,13 +1,16 @@
 /*
- * Copyright (c) 2018, Arm Limited. All rights reserved.
+ * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
  */
 
+#include <stdbool.h>
 #include "tfm_platform_api.h"
 #include "tfm_platform_veneers.h"
 #include "tfm_ns_lock.h"
+#include "tfm_platform_defs.h"
+#include "tfm_veneers.h"
 
 enum tfm_platform_err_t tfm_platform_system_reset(void)
 {
@@ -17,3 +20,95 @@
                                 0,
                                 0);
 }
+
+enum tfm_platform_err_t
+tfm_platform_set_pin_alt_func(uint32_t alt_func, uint64_t pin_mask,
+                              uint32_t *result)
+{
+    enum tfm_platform_err_t ret;
+    psa_invec in_vec;
+    psa_outvec out_vec;
+    struct tfm_pin_service_args_t args;
+
+    if (result == NULL) {
+        return TFM_PLATFORM_ERR_INVALID_PARAM;
+    }
+
+    args.type = TFM_PIN_SERVICE_TYPE_SET_ALTFUNC;
+    args.u.set_altfunc.alt_func = alt_func;
+    args.u.set_altfunc.pin_mask = pin_mask;
+
+    in_vec.base = (const void *)&args;
+    in_vec.len = sizeof(args);
+
+    out_vec.base = (void *)result;
+    out_vec.len = sizeof(*result);
+
+    ret = tfm_ns_lock_dispatch((veneer_fn)tfm_platform_sp_pin_service_veneer,
+                                (uint32_t)&in_vec,  1,
+                                (uint32_t)&out_vec, 1);
+
+    return ret;
+}
+
+enum tfm_platform_err_t
+tfm_platform_set_pin_default_in(uint32_t alt_func, uint32_t pin_value,
+                              bool default_in_value, uint32_t *result)
+{
+    enum tfm_platform_err_t ret;
+    psa_invec in_vec;
+    psa_outvec out_vec;
+    struct tfm_pin_service_args_t args;
+
+    if (result == NULL) {
+        return TFM_PLATFORM_ERR_INVALID_PARAM;
+    }
+
+    args.type = TFM_PIN_SERVICE_TYPE_SET_DEFAULT_IN;
+    args.u.set_default_in.alt_func = alt_func;
+    args.u.set_default_in.pin_value = pin_value;
+    args.u.set_default_in.default_in_value = default_in_value;
+
+    in_vec.base = (const void *)&args;
+    in_vec.len = sizeof(args);
+
+    out_vec.base = (void *)result;
+    out_vec.len = sizeof(*result);
+
+    ret = tfm_ns_lock_dispatch((veneer_fn)tfm_platform_sp_pin_service_veneer,
+                                (uint32_t)&in_vec,  1,
+                                (uint32_t)&out_vec, 1);
+
+    return ret;
+}
+
+enum tfm_platform_err_t
+tfm_platform_set_pin_mode(uint64_t pin_mask, uint32_t pin_mode,
+                          uint32_t *result)
+{
+    enum tfm_platform_err_t ret;
+    psa_invec in_vec;
+    psa_outvec out_vec;
+    struct tfm_pin_service_args_t args;
+
+    if (result == NULL) {
+        return TFM_PLATFORM_ERR_INVALID_PARAM;
+    }
+
+    args.type = TFM_PIN_SERVICE_TYPE_SET_PIN_MODE;
+    args.u.set_pin_mode.pin_mask = pin_mask;
+    args.u.set_pin_mode.pin_mode = pin_mode;
+
+    in_vec.base = (const void *)&args;
+    in_vec.len = sizeof(args);
+
+    out_vec.base = (void *)result;
+    out_vec.len = sizeof(*result);
+
+    ret = tfm_ns_lock_dispatch((veneer_fn)tfm_platform_sp_pin_service_veneer,
+                                (uint32_t)&in_vec,  1,
+                                (uint32_t)&out_vec, 1);
+
+    return ret;
+}
+