diff --git a/drivers/clk/renesas/clk-mstp.c b/drivers/clk/renesas/clk-mstp.c
index 5e3b3d856eefcac27c6adebd8ecbbab5c975c122..8b597b9a380442e8bbbc17086a2c194be848a7f2 100644
--- a/drivers/clk/renesas/clk-mstp.c
+++ b/drivers/clk/renesas/clk-mstp.c
@@ -243,7 +243,7 @@ static void __init cpg_mstp_clocks_init(struct device_node *np)
 }
 CLK_OF_DECLARE(cpg_mstp_clks, "renesas,cpg-mstp-clocks", cpg_mstp_clocks_init);
 
-int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev)
+int cpg_mstp_attach_dev(struct generic_pm_domain *unused, struct device *dev)
 {
 	struct device_node *np = dev->of_node;
 	struct of_phandle_args clkspec;
@@ -295,7 +295,7 @@ int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev)
 	return error;
 }
 
-void cpg_mstp_detach_dev(struct generic_pm_domain *domain, struct device *dev)
+void cpg_mstp_detach_dev(struct generic_pm_domain *unused, struct device *dev)
 {
 	if (!list_empty(&dev->power.subsys_data->clock_list))
 		pm_clk_destroy(dev);
diff --git a/include/linux/clk/renesas.h b/include/linux/clk/renesas.h
index 2a3379cf13304837cc535665710eb5a2984aa48c..095b1681daf46faf103bf56e9c1cec97bb610818 100644
--- a/include/linux/clk/renesas.h
+++ b/include/linux/clk/renesas.h
@@ -25,7 +25,7 @@ void r8a7779_clocks_init(u32 mode);
 void rcar_gen2_clocks_init(u32 mode);
 
 void cpg_mstp_add_clk_domain(struct device_node *np);
-int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev);
-void cpg_mstp_detach_dev(struct generic_pm_domain *domain, struct device *dev);
+int cpg_mstp_attach_dev(struct generic_pm_domain *unused, struct device *dev);
+void cpg_mstp_detach_dev(struct generic_pm_domain *unused, struct device *dev);
 
 #endif