diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 467702da0e82..8767e04d6c89 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1469,8 +1469,7 @@ static int __maybe_unused sysc_noirq_suspend(struct device *dev)
 
 	ddata = dev_get_drvdata(dev);
 
-	if (ddata->cfg.quirks &
-	    (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
+	if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
 		return 0;
 
 	if (!ddata->enabled)
@@ -1488,8 +1487,7 @@ static int __maybe_unused sysc_noirq_resume(struct device *dev)
 
 	ddata = dev_get_drvdata(dev);
 
-	if (ddata->cfg.quirks &
-	    (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE))
+	if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE)
 		return 0;
 
 	if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_RESUME) {
@@ -2457,89 +2455,6 @@ static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
 	return pm_generic_runtime_resume(dev);
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int sysc_child_suspend_noirq(struct device *dev)
-{
-	struct sysc *ddata;
-	int error;
-
-	ddata = sysc_child_to_parent(dev);
-
-	dev_dbg(ddata->dev, "%s %s\n", __func__,
-		ddata->name ? ddata->name : "");
-
-	error = pm_generic_suspend_noirq(dev);
-	if (error) {
-		dev_err(dev, "%s error at %i: %i\n",
-			__func__, __LINE__, error);
-
-		return error;
-	}
-
-	if (!pm_runtime_status_suspended(dev)) {
-		error = pm_generic_runtime_suspend(dev);
-		if (error) {
-			dev_dbg(dev, "%s busy at %i: %i\n",
-				__func__, __LINE__, error);
-
-			return 0;
-		}
-
-		error = sysc_runtime_suspend(ddata->dev);
-		if (error) {
-			dev_err(dev, "%s error at %i: %i\n",
-				__func__, __LINE__, error);
-
-			return error;
-		}
-
-		ddata->child_needs_resume = true;
-	}
-
-	return 0;
-}
-
-static int sysc_child_resume_noirq(struct device *dev)
-{
-	struct sysc *ddata;
-	int error;
-
-	ddata = sysc_child_to_parent(dev);
-
-	dev_dbg(ddata->dev, "%s %s\n", __func__,
-		ddata->name ? ddata->name : "");
-
-	if (ddata->child_needs_resume) {
-		ddata->child_needs_resume = false;
-
-		error = sysc_runtime_resume(ddata->dev);
-		if (error)
-			dev_err(ddata->dev,
-				"%s runtime resume error: %i\n",
-				__func__, error);
-
-		error = pm_generic_runtime_resume(dev);
-		if (error)
-			dev_err(ddata->dev,
-				"%s generic runtime resume: %i\n",
-				__func__, error);
-	}
-
-	return pm_generic_resume_noirq(dev);
-}
-#endif
-
-static struct dev_pm_domain sysc_child_pm_domain = {
-	.ops = {
-		SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
-				   sysc_child_runtime_resume,
-				   NULL)
-		USE_PLATFORM_PM_SLEEP_OPS
-		SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
-					      sysc_child_resume_noirq)
-	}
-};
-
 /* Caller needs to take list_lock if ever used outside of cpu_pm */
 static void sysc_reinit_modules(struct sysc_soc_info *soc)
 {
@@ -2610,25 +2525,6 @@ static void sysc_add_restored(struct sysc *ddata)
 	mutex_unlock(&sysc_soc->list_lock);
 }
 
-/**
- * sysc_legacy_idle_quirk - handle children in omap_device compatible way
- * @ddata: device driver data
- * @child: child device driver
- *
- * Allow idle for child devices as done with _od_runtime_suspend().
- * Otherwise many child devices will not idle because of the permanent
- * parent usecount set in pm_runtime_irq_safe().
- *
- * Note that the long term solution is to just modify the child device
- * drivers to not set pm_runtime_irq_safe() and then this can be just
- * dropped.
- */
-static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
-{
-	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
-		dev_pm_domain_set(child, &sysc_child_pm_domain);
-}
-
 static int sysc_notifier_call(struct notifier_block *nb,
 			      unsigned long event, void *device)
 {
@@ -2645,7 +2541,6 @@ static int sysc_notifier_call(struct notifier_block *nb,
 		error = sysc_child_add_clocks(ddata, dev);
 		if (error)
 			return error;
-		sysc_legacy_idle_quirk(ddata, dev);
 		break;
 	default:
 		break;
diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
index eb556f988d57..d8f15770a522 100644
--- a/include/linux/platform_data/ti-sysc.h
+++ b/include/linux/platform_data/ti-sysc.h
@@ -71,7 +71,6 @@ struct sysc_regbits {
 #define SYSC_QUIRK_SWSUP_SIDLE_ACT	BIT(12)
 #define SYSC_QUIRK_SWSUP_SIDLE		BIT(11)
 #define SYSC_QUIRK_EXT_OPT_CLOCK	BIT(10)
-#define SYSC_QUIRK_LEGACY_IDLE		BIT(9)
 #define SYSC_QUIRK_RESET_STATUS		BIT(8)
 #define SYSC_QUIRK_NO_IDLE		BIT(7)
 #define SYSC_QUIRK_NO_IDLE_ON_INIT	BIT(6)