diff --git a/plat/mediatek/mt8183/drivers/spm/spm_suspend.c b/plat/mediatek/mt8183/drivers/spm/spm_suspend.c
new file mode 100644
index 0000000..b9ac19f
--- /dev/null
+++ b/plat/mediatek/mt8183/drivers/spm/spm_suspend.c
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <mt_gic_v3.h>
+#include <lib/mmio.h>
+#include <platform_def.h>
+#include <pmic.h>
+#include <spm.h>
+#include <uart.h>
+
+#define SPM_SYSCLK_SETTLE       99
+
+#define WAKE_SRC_FOR_SUSPEND \
+	(WAKE_SRC_R12_PCM_TIMER | \
+	 WAKE_SRC_R12_SSPM_WDT_EVENT_B | \
+	 WAKE_SRC_R12_KP_IRQ_B | \
+	 WAKE_SRC_R12_CONN2AP_SPM_WAKEUP_B | \
+	 WAKE_SRC_R12_EINT_EVENT_B | \
+	 WAKE_SRC_R12_CONN_WDT_IRQ_B | \
+	 WAKE_SRC_R12_CCIF0_EVENT_B | \
+	 WAKE_SRC_R12_SSPM_SPM_IRQ_B | \
+	 WAKE_SRC_R12_SCP_SPM_IRQ_B | \
+	 WAKE_SRC_R12_SCP_WDT_EVENT_B | \
+	 WAKE_SRC_R12_USB_CDSC_B | \
+	 WAKE_SRC_R12_USB_POWERDWN_B | \
+	 WAKE_SRC_R12_SYS_TIMER_EVENT_B | \
+	 WAKE_SRC_R12_EINT_EVENT_SECURE_B | \
+	 WAKE_SRC_R12_CCIF1_EVENT_B | \
+	 WAKE_SRC_R12_MD2AP_PEER_EVENT_B | \
+	 WAKE_SRC_R12_MD1_WDT_B | \
+	 WAKE_SRC_R12_CLDMA_EVENT_B | \
+	 WAKE_SRC_R12_SEJ_WDT_GPT_B)
+
+#define SLP_PCM_FLAGS \
+	(SPM_FLAG_DIS_VCORE_DVS	| SPM_FLAG_DIS_VCORE_DFS | \
+	 SPM_FLAG_DIS_ATF_ABORT | SPM_FLAG_DISABLE_MMSYS_DVFS | \
+	 SPM_FLAG_DIS_INFRA_PDN | SPM_FLAG_SUSPEND_OPTION)
+
+#define SLP_PCM_FLAGS1 \
+	(SPM_FLAG1_DISABLE_MCDSR)
+
+static const struct pwr_ctrl suspend_ctrl = {
+	.wake_src = WAKE_SRC_FOR_SUSPEND,
+	.pcm_flags = SLP_PCM_FLAGS,
+	.pcm_flags1 = SLP_PCM_FLAGS1,
+
+	/* SPM_AP_STANDBY_CON */
+	.wfi_op = 0x1,
+	.mp0_cputop_idle_mask = 0,
+	.mp1_cputop_idle_mask = 0,
+	.mcusys_idle_mask = 0,
+	.mm_mask_b = 0,
+	.md_ddr_en_0_dbc_en = 0x1,
+	.md_ddr_en_1_dbc_en = 0,
+	.md_mask_b = 0x1,
+	.sspm_mask_b = 0x1,
+	.scp_mask_b = 0x1,
+	.srcclkeni_mask_b = 0x1,
+	.md_apsrc_1_sel = 0,
+	.md_apsrc_0_sel = 0,
+	.conn_ddr_en_dbc_en = 0x1,
+	.conn_mask_b = 0x1,
+	.conn_apsrc_sel = 0,
+
+	/* SPM_SRC_REQ */
+	.spm_apsrc_req = 0,
+	.spm_f26m_req = 0,
+	.spm_infra_req = 0,
+	.spm_vrf18_req = 0,
+	.spm_ddren_req = 0,
+	.spm_rsv_src_req = 0,
+	.spm_ddren_2_req = 0,
+	.cpu_md_dvfs_sop_force_on = 0,
+
+	/* SPM_SRC_MASK */
+	.csyspwreq_mask = 0x1,
+	.ccif0_md_event_mask_b = 0x1,
+	.ccif0_ap_event_mask_b = 0x1,
+	.ccif1_md_event_mask_b = 0x1,
+	.ccif1_ap_event_mask_b = 0x1,
+	.ccif2_md_event_mask_b = 0x1,
+	.ccif2_ap_event_mask_b = 0x1,
+	.ccif3_md_event_mask_b = 0x1,
+	.ccif3_ap_event_mask_b = 0x1,
+	.md_srcclkena_0_infra_mask_b = 0x1,
+	.md_srcclkena_1_infra_mask_b = 0,
+	.conn_srcclkena_infra_mask_b = 0,
+	.ufs_infra_req_mask_b = 0,
+	.srcclkeni_infra_mask_b = 0,
+	.md_apsrc_req_0_infra_mask_b = 0x1,
+	.md_apsrc_req_1_infra_mask_b = 0x1,
+	.conn_apsrcreq_infra_mask_b = 0x1,
+	.ufs_srcclkena_mask_b = 0,
+	.md_vrf18_req_0_mask_b = 0,
+	.md_vrf18_req_1_mask_b = 0,
+	.ufs_vrf18_req_mask_b = 0,
+	.gce_vrf18_req_mask_b = 0,
+	.conn_infra_req_mask_b = 0x1,
+	.gce_apsrc_req_mask_b = 0,
+	.disp0_apsrc_req_mask_b = 0,
+	.disp1_apsrc_req_mask_b = 0,
+	.mfg_req_mask_b = 0,
+	.vdec_req_mask_b = 0,
+
+	/* SPM_SRC2_MASK */
+	.md_ddr_en_0_mask_b = 0x1,
+	.md_ddr_en_1_mask_b = 0,
+	.conn_ddr_en_mask_b = 0x1,
+	.ddren_sspm_apsrc_req_mask_b = 0x1,
+	.ddren_scp_apsrc_req_mask_b = 0x1,
+	.disp0_ddren_mask_b = 0x1,
+	.disp1_ddren_mask_b = 0x1,
+	.gce_ddren_mask_b = 0x1,
+	.ddren_emi_self_refresh_ch0_mask_b = 0,
+	.ddren_emi_self_refresh_ch1_mask_b = 0,
+
+	/* SPM_WAKEUP_EVENT_MASK */
+	.spm_wakeup_event_mask = 0xF1782218,
+
+	/* SPM_WAKEUP_EVENT_EXT_MASK */
+	.spm_wakeup_event_ext_mask = 0xFFFFFFFF,
+
+	/* SPM_SRC3_MASK */
+	.md_ddr_en_2_0_mask_b = 0x1,
+	.md_ddr_en_2_1_mask_b = 0,
+	.conn_ddr_en_2_mask_b = 0x1,
+	.ddren2_sspm_apsrc_req_mask_b = 0x1,
+	.ddren2_scp_apsrc_req_mask_b = 0x1,
+	.disp0_ddren2_mask_b = 0,
+	.disp1_ddren2_mask_b = 0,
+	.gce_ddren2_mask_b = 0,
+	.ddren2_emi_self_refresh_ch0_mask_b = 0,
+	.ddren2_emi_self_refresh_ch1_mask_b = 0,
+
+	.mp0_cpu0_wfi_en = 0x1,
+	.mp0_cpu1_wfi_en = 0x1,
+	.mp0_cpu2_wfi_en = 0x1,
+	.mp0_cpu3_wfi_en = 0x1,
+
+	.mp1_cpu0_wfi_en = 0x1,
+	.mp1_cpu1_wfi_en = 0x1,
+	.mp1_cpu2_wfi_en = 0x1,
+	.mp1_cpu3_wfi_en = 0x1
+};
+
+static uint32_t spm_set_sysclk_settle(void)
+{
+	mmio_write_32(SPM_CLK_SETTLE, SPM_SYSCLK_SETTLE);
+	return mmio_read_32(SPM_CLK_SETTLE);
+}
+
+void go_to_sleep_before_wfi(void)
+{
+	int cpu = MPIDR_AFFLVL0_VAL(read_mpidr());
+	uint32_t settle;
+
+	settle = spm_set_sysclk_settle();
+	spm_set_cpu_status(cpu);
+	spm_set_power_control(&suspend_ctrl);
+	spm_set_wakeup_event(&suspend_ctrl);
+	spm_set_pcm_flags(&suspend_ctrl);
+	spm_send_cpu_wakeup_event();
+	spm_set_pcm_wdt(0);
+	spm_disable_pcm_timer();
+
+	if (is_infra_pdn(suspend_ctrl.pcm_flags))
+		mt_uart_save();
+
+	if (!mt_console_uart_cg_status())
+		console_switch_state(CONSOLE_FLAG_BOOT);
+
+	INFO("cpu%d: \"%s\", wakesrc = 0x%x, pcm_con1 = 0x%x\n",
+	     cpu, spm_get_firmware_version(), suspend_ctrl.wake_src,
+	     mmio_read_32(PCM_CON1));
+	INFO("settle = %u, sec = %u, sw_flag = 0x%x 0x%x, src_req = 0x%x\n",
+	     settle, mmio_read_32(PCM_TIMER_VAL) / 32768,
+	     suspend_ctrl.pcm_flags, suspend_ctrl.pcm_flags1,
+	     mmio_read_32(SPM_SRC_REQ));
+
+	if (!mt_console_uart_cg_status())
+		console_switch_state(CONSOLE_FLAG_RUNTIME);
+}
+
+static void go_to_sleep_after_wfi(void)
+{
+	struct wake_status spm_wakesta;
+
+	if (is_infra_pdn(suspend_ctrl.pcm_flags))
+		mt_uart_restore();
+
+	spm_set_pcm_wdt(0);
+	spm_get_wakeup_status(&spm_wakesta);
+	spm_clean_after_wakeup();
+
+	if (!mt_console_uart_cg_status())
+		console_switch_state(CONSOLE_FLAG_BOOT);
+
+	spm_output_wake_reason(&spm_wakesta, "suspend");
+
+	if (!mt_console_uart_cg_status())
+		console_switch_state(CONSOLE_FLAG_RUNTIME);
+}
+
+static void spm_enable_armpll_l(void)
+{
+	/* power on */
+	mmio_setbits_32(ARMPLL_L_PWR_CON0, 0x1);
+
+	/* clear isolation */
+	mmio_clrbits_32(ARMPLL_L_PWR_CON0, 0x2);
+
+	/* enable pll */
+	mmio_setbits_32(ARMPLL_L_CON0, 0x1);
+
+	/* Add 20us delay for turning on PLL */
+	udelay(20);
+}
+
+static void spm_disable_armpll_l(void)
+{
+	/* disable pll */
+	mmio_clrbits_32(ARMPLL_L_CON0, 0x1);
+
+	/* isolation */
+	mmio_setbits_32(ARMPLL_L_PWR_CON0, 0x2);
+
+	/* power off */
+	mmio_clrbits_32(ARMPLL_L_PWR_CON0, 0x1);
+}
+
+void spm_system_suspend(void)
+{
+	spm_disable_armpll_l();
+	bcpu_enable(0);
+	bcpu_sram_enable(0);
+	spm_lock_get();
+	go_to_sleep_before_wfi();
+	spm_lock_release();
+}
+
+void spm_system_suspend_finish(void)
+{
+	spm_lock_get();
+	go_to_sleep_after_wfi();
+	spm_lock_release();
+	spm_enable_armpll_l();
+	bcpu_sram_enable(1);
+	bcpu_enable(1);
+}