diff --git a/plat/imx/common/imx8_psci.c b/plat/imx/common/imx8_psci.c
index 37eda3e..22a531b 100644
--- a/plat/imx/common/imx8_psci.c
+++ b/plat/imx/common/imx8_psci.c
@@ -27,3 +27,20 @@
 	panic();
 }
 
+int imx_validate_power_state(unsigned int power_state,
+			 psci_power_state_t *req_state)
+{
+	/* TODO */
+	return PSCI_E_INVALID_PARAMS;
+}
+
+void imx_get_sys_suspend_power_state(psci_power_state_t *req_state)
+{
+	unsigned int i;
+
+	/* CPU & cluster off, system in retention */
+	for (i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
+		req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
+	req_state->pwr_domain_state[PLAT_MAX_PWR_LVL] = PLAT_MAX_RET_STATE;
+}
+
diff --git a/plat/imx/common/include/plat_imx8.h b/plat/imx/common/include/plat_imx8.h
index 3b5f4ec..a333bfb 100644
--- a/plat/imx/common/include/plat_imx8.h
+++ b/plat/imx/common/include/plat_imx8.h
@@ -8,6 +8,7 @@
 #define __PLAT_IMX8_H__
 
 #include <gicv3.h>
+#include <psci.h>
 
 unsigned int plat_calc_core_pos(uint64_t mpidr);
 void imx_mailbox_init(uintptr_t base_addr);
@@ -19,4 +20,7 @@
 
 void __dead2 imx_system_off(void);
 void __dead2 imx_system_reset(void);
+int imx_validate_power_state(unsigned int power_state,
+			psci_power_state_t *req_state);
+void imx_get_sys_suspend_power_state(psci_power_state_t *req_state);
 #endif /*__PLAT_IMX8_H__ */