add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/acpi/irq.c
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@@ -1,12 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * ACPI GSI IRQ layer
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  *
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  * Copyright (C) 2015 ARM Ltd.
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  * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #include <linux/acpi.h>
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 #include <linux/irq.h>
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@@ -196,7 +193,7 @@
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 		fwnode = acpi_gsi_domain_id;
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 		acpi_irq_parse_one_match(fwnode, irq->interrupts[ctx->index],
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 					 irq->triggering, irq->polarity,
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-					 irq->sharable, ctx);
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+					 irq->shareable, ctx);
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 		return AE_CTRL_TERMINATE;
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 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
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 		eirq = &ares->data.extended_irq;
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@@ -209,7 +206,7 @@
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 		fwnode = acpi_get_irq_source_fwhandle(&eirq->resource_source);
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 		acpi_irq_parse_one_match(fwnode, eirq->interrupts[ctx->index],
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 					 eirq->triggering, eirq->polarity,
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-					 eirq->sharable, ctx);
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+					 eirq->shareable, ctx);
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 		return AE_CTRL_TERMINATE;
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 	}
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@@ -295,3 +292,29 @@
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 	acpi_irq_model = model;
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 	acpi_gsi_domain_id = fwnode;
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 }
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+
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+/**
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+ * acpi_irq_create_hierarchy - Create a hierarchical IRQ domain with the default
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+ *                             GSI domain as its parent.
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+ * @flags:      Irq domain flags associated with the domain
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+ * @size:       Size of the domain.
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+ * @fwnode:     Optional fwnode of the interrupt controller
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+ * @ops:        Pointer to the interrupt domain callbacks
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+ * @host_data:  Controller private data pointer
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+ */
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+struct irq_domain *acpi_irq_create_hierarchy(unsigned int flags,
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+					     unsigned int size,
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+					     struct fwnode_handle *fwnode,
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+					     const struct irq_domain_ops *ops,
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+					     void *host_data)
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+{
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+	struct irq_domain *d = irq_find_matching_fwnode(acpi_gsi_domain_id,
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+							DOMAIN_BUS_ANY);
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+
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+	if (!d)
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+		return NULL;
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+
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+	return irq_domain_create_hierarchy(d, flags, size, fwnode, ops,
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+					   host_data);
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+}
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+EXPORT_SYMBOL_GPL(acpi_irq_create_hierarchy);