4 files changed, 4 insertions, 4 deletions
diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c
index b0d380cb6f..e9513cd8ec 100644
--- a/src/soc/intel/baytrail/romstage/romstage.c
+++ b/src/soc/intel/baytrail/romstage/romstage.c
@@ -59,7 +59,7 @@ static struct chipset_power_state *fill_power_state(void)
 }
 
 /* Return 0, 3, or 5 to indicate the previous sleep state. */
-static int chipset_prev_sleep_state(struct chipset_power_state *ps)
+static int chipset_prev_sleep_state(const struct chipset_power_state *ps)
 {
 	/* Default to S0. */
 	int prev_sleep_state = ACPI_S0;
diff --git a/src/soc/intel/braswell/include/soc/romstage.h b/src/soc/intel/braswell/include/soc/romstage.h
index 2cf9afa633..3f38de8f2d 100644
--- a/src/soc/intel/braswell/include/soc/romstage.h
+++ b/src/soc/intel/braswell/include/soc/romstage.h
@@ -11,7 +11,7 @@ void gfx_init(void);
 void punit_init(void);
 
 /* romstage.c functions */
-int chipset_prev_sleep_state(struct chipset_power_state *ps);
+int chipset_prev_sleep_state(const struct chipset_power_state *ps);
 
 /* Values for FSP's PcdMemoryTypeEnable */
 #define MEM_DDR3	0
diff --git a/src/soc/intel/braswell/romstage/romstage.c b/src/soc/intel/braswell/romstage/romstage.c
index 1738679b1e..5a1aa0ae73 100644
--- a/src/soc/intel/braswell/romstage/romstage.c
+++ b/src/soc/intel/braswell/romstage/romstage.c
@@ -57,7 +57,7 @@ struct chipset_power_state *fill_power_state(void)
 }
 
 /* Return 0, 3, or 5 to indicate the previous sleep state. */
-int chipset_prev_sleep_state(struct chipset_power_state *ps)
+int chipset_prev_sleep_state(const struct chipset_power_state *ps)
 {
 	/* Default to S0. */
 	int prev_sleep_state = ACPI_S0;
diff --git a/src/soc/intel/broadwell/pch/power_state.c b/src/soc/intel/broadwell/pch/power_state.c
index cb1d3e5b9c..12bee7d127 100644
--- a/src/soc/intel/broadwell/pch/power_state.c
+++ b/src/soc/intel/broadwell/pch/power_state.c
@@ -33,7 +33,7 @@ static void migrate_power_state(int is_recovery)
 ROMSTAGE_CBMEM_INIT_HOOK(migrate_power_state)
 
 /* Return 0, 3, or 5 to indicate the previous sleep state. */
-static int prev_sleep_state(struct chipset_power_state *ps)
+static int prev_sleep_state(const struct chipset_power_state *ps)
 {
 	/* Default to S0. */
 	int prev_sleep_state = ACPI_S0;