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irqdomain: Add parent field to struct irqchip_fwid

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The GICv5 driver IRQ domain hierarchy requires adding a parent field to
struct irqchip_fwid so that core code can reference a fwnode_handle parent
for a given fwnode.

Add a parent field to struct irqchip_fwid and update the related kernel API
functions to initialize and handle it.

Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260115-gicv5-host-acpi-v3-1-c13a9a150388@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lorenzo Pieralisi 2026-01-15 10:50:47 +01:00 committed by Rafael J. Wysocki
parent 8d9ad85dbf
commit 0323897a88
2 changed files with 39 additions and 5 deletions
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30
include/linux/irqdomain.h
View File

@ -257,7 +257,8 @@ static inline void irq_domain_set_pm_device(struct irq_domain *d, struct device
#ifdef CONFIG_IRQ_DOMAIN
struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
const char *name, phys_addr_t *pa);
const char *name, phys_addr_t *pa,
struct fwnode_handle *parent);
enum {
IRQCHIP_FWNODE_REAL,
@ -267,18 +268,39 @@ enum {
static inline struct fwnode_handle *irq_domain_alloc_named_fwnode(const char *name)
{
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL);
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL, NULL);
}
static inline
struct fwnode_handle *irq_domain_alloc_named_parented_fwnode(const char *name,
struct fwnode_handle *parent)
{
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED, 0, name, NULL, parent);
}
static inline struct fwnode_handle *irq_domain_alloc_named_id_fwnode(const char *name, int id)
{
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name,
NULL);
NULL, NULL);
}
static inline
struct fwnode_handle *irq_domain_alloc_named_id_parented_fwnode(const char *name, int id,
struct fwnode_handle *parent)
{
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_NAMED_ID, id, name,
NULL, parent);
}
static inline struct fwnode_handle *irq_domain_alloc_fwnode(phys_addr_t *pa)
{
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa);
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa, NULL);
}
static inline struct fwnode_handle *irq_domain_alloc_parented_fwnode(phys_addr_t *pa,
struct fwnode_handle *parent)
{
return __irq_domain_alloc_fwnode(IRQCHIP_FWNODE_REAL, 0, NULL, pa, parent);
}
void irq_domain_free_fwnode(struct fwnode_handle *fwnode);

14
kernel/irq/irqdomain.c
View File

@ -33,6 +33,7 @@ static void irq_domain_free_one_irq(struct irq_domain *domain, unsigned int virq
struct irqchip_fwid {
struct fwnode_handle fwnode;
struct fwnode_handle *parent;
unsigned int type;
char *name;
phys_addr_t *pa;
@ -53,8 +54,16 @@ static const char *irqchip_fwnode_get_name(const struct fwnode_handle *fwnode)
return fwid->name;
}
static struct fwnode_handle *irqchip_fwnode_get_parent(const struct fwnode_handle *fwnode)
{
struct irqchip_fwid *fwid = container_of(fwnode, struct irqchip_fwid, fwnode);
return fwid->parent;
}
const struct fwnode_operations irqchip_fwnode_ops = {
.get_name = irqchip_fwnode_get_name,
.get_parent = irqchip_fwnode_get_parent,
};
EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
@ -65,6 +74,7 @@ EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
* @id: Optional user provided id if name != NULL
* @name: Optional user provided domain name
* @pa: Optional user-provided physical address
* @parent: Optional parent fwnode_handle
*
* Allocate a struct irqchip_fwid, and return a pointer to the embedded
* fwnode_handle (or NULL on failure).
@ -76,7 +86,8 @@ EXPORT_SYMBOL_GPL(irqchip_fwnode_ops);
*/
struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
const char *name,
phys_addr_t *pa)
phys_addr_t *pa,
struct fwnode_handle *parent)
{
struct irqchip_fwid *fwid;
char *n;
@ -104,6 +115,7 @@ struct fwnode_handle *__irq_domain_alloc_fwnode(unsigned int type, int id,
fwid->type = type;
fwid->name = n;
fwid->pa = pa;
fwid->parent = parent;
fwnode_init(&fwid->fwnode, &irqchip_fwnode_ops);
return &fwid->fwnode;
}