diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c
index 22e96e2..f024db0 100644
--- a/drivers/pwm/pwm-tiecap.c
+++ b/drivers/pwm/pwm-tiecap.c
@@ -311,6 +311,7 @@
 	writew(pc->ctx.ecctl2, pc->mmio_base + ECCTL2);
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int ecap_pwm_suspend(struct device *dev)
 {
 	struct ecap_pwm_chip *pc = dev_get_drvdata(dev);
@@ -337,6 +338,7 @@
 	ecap_pwm_restore_context(pc);
 	return 0;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(ecap_pwm_pm_ops, ecap_pwm_suspend, ecap_pwm_resume);