feat(mediatek): add UFS stub implementation
Implement stub functions for UFS to ensure that the build can pass when
a prebuilt library is not available.
Change-Id: If4470cd9a5b88e869363e763aec5830c1f8411f5
Signed-off-by: Yidi Lin <yidilin@chromium.org>
diff --git a/plat/mediatek/include/mtk_bl31_interface.h b/plat/mediatek/include/mtk_bl31_interface.h
new file mode 100644
index 0000000..9650f71
--- /dev/null
+++ b/plat/mediatek/include/mtk_bl31_interface.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2025, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __MTK_BL31_INTERFACE_H__
+#define __MTK_BL31_INTERFACE_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+
+/* UFS definitions */
+enum ufs_mtk_mphy_op {
+ UFS_MPHY_BACKUP = 0,
+ UFS_MPHY_RESTORE,
+};
+
+enum ufs_notify_change_status {
+ PRE_CHANGE,
+ POST_CHANGE,
+};
+
+/* UFS interfaces */
+void ufs_mphy_va09_cg_ctrl(bool enable);
+void ufs_device_reset_ctrl(bool rst_n);
+void ufs_crypto_hie_init(void);
+void ufs_ref_clk_status(uint32_t on, enum ufs_notify_change_status stage);
+void ufs_sram_pwr_ctrl(bool on);
+void ufs_device_pwr_ctrl(bool vcc_on, uint64_t ufs_version);
+void ufs_mphy_ctrl(enum ufs_mtk_mphy_op op);
+void ufs_mtcmos_ctrl(bool on);
+
+#endif /* __MTK_BL31_INTERFACE_H__ */