diff --git a/include/linux/irq.h b/include/linux/irq.h
index 5c57efb863d0..c75dd161d37f 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -637,6 +637,21 @@ static inline int irq_reserve_irq(unsigned int irq)
 	return irq_reserve_irqs(irq, 1);
 }
 
+#ifdef CONFIG_GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
+unsigned int irq_alloc_hwirqs(int cnt, int node);
+static inline unsigned int irq_alloc_hwirq(int node)
+{
+	return irq_alloc_hwirqs(1, node);
+}
+void irq_free_hwirqs(unsigned int from, int cnt);
+static inline void irq_free_hwirq(unsigned int irq)
+{
+	return irq_free_hwirqs(irq, 1);
+}
+int arch_setup_hwirq(unsigned int irq, int node);
+void arch_teardown_hwirq(unsigned int irq);
+#endif
+
 #ifndef irq_reg_writel
 # define irq_reg_writel(val, addr)	writel(val, addr)
 #endif
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 07cbdfea9ae2..a83f10e406c1 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -17,6 +17,11 @@ config GENERIC_IRQ_SHOW
 config GENERIC_IRQ_SHOW_LEVEL
        bool
 
+# Facility to allocate a hardware interrupt. This is legacy support
+# and should not be used in new code. Use irq domains instead.
+config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
+       bool
+
 # Support for delayed migration from interrupt context
 config GENERIC_PENDING_IRQ
 	bool
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index bb07f2928f4b..f388ade5e792 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -396,6 +396,57 @@ err:
 }
 EXPORT_SYMBOL_GPL(__irq_alloc_descs);
 
+#ifdef CONFIG_GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
+/**
+ * irq_alloc_hwirqs - Allocate an irq descriptor and initialize the hardware
+ * @cnt:	number of interrupts to allocate
+ * @node:	node on which to allocate
+ *
+ * Returns an interrupt number > 0 or 0, if the allocation fails.
+ */
+unsigned int irq_alloc_hwirqs(int cnt, int node)
+{
+	int i, irq = __irq_alloc_descs(-1, 0, cnt, node, NULL);
+
+	if (irq < 0)
+		return 0;
+
+	for (i = irq; cnt > 0; i++, cnt--) {
+		if (arch_setup_hwirq(i, node))
+			goto err;
+		irq_clear_status_flags(i, _IRQ_NOREQUEST);
+	}
+	return irq;
+
+err:
+	for (i--; i >= irq; i--) {
+		irq_set_status_flags(i, _IRQ_NOREQUEST | _IRQ_NOPROBE);
+		arch_teardown_hwirq(i);
+	}
+	irq_free_descs(irq, cnt);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(irq_alloc_hwirqs);
+
+/**
+ * irq_free_hwirqs - Free irq descriptor and cleanup the hardware
+ * @from:	Free from irq number
+ * @cnt:	number of interrupts to free
+ *
+ */
+void irq_free_hwirqs(unsigned int from, int cnt)
+{
+	int i;
+
+	for (i = from; cnt > 0; i++, cnt--) {
+		irq_set_status_flags(i, _IRQ_NOREQUEST | _IRQ_NOPROBE);
+		arch_teardown_hwirq(i);
+	}
+	irq_free_descs(from, cnt);
+}
+EXPORT_SYMBOL_GPL(irq_free_hwirqs);
+#endif
+
 /**
  * irq_reserve_irqs - mark irqs allocated
  * @from:	mark from irq number