[tip: irq/drivers] genirq/irqdomain: Add devm_irq_domain_create_linear()

["tip-bot2 for Zhipeng Wang" <tip-bot2@linutronix.de>]

The following commit has been merged into the irq/drivers branch of tip:

Commit-ID:     8d095487a7bef8e060e360eb4d85aa1ab0fd62a5
Gitweb:        https://git.kernel.org/tip/8d095487a7bef8e060e360eb4d85aa1ab0fd62a5
Author:        Zhipeng Wang <zhipeng.wang_1@nxp.com>
AuthorDate:    Wed, 04 Nov 2026 16:37:57 +09:00
Committer:     Thomas Gleixner <tglx@kernel.org>
CommitterDate: Sun, 08 Nov 2026 22:43:44 +01:00

genirq/irqdomain: Add devm_irq_domain_create_linear()

irq_domain_create_linear() has no devres-managed counterpart, so a
driver that wants a linear revmap domain tied to the device lifetime has
to open-code an irq_domain_info and call devm_irq_domain_instantiate()
directly.

Add devm_irq_domain_create_linear() as the devres-managed sibling of
irq_domain_create_linear(): it builds the same linear-revmap
irq_domain_info and hands it to devm_irq_domain_instantiate(), so the
domain is removed when the owning device is unbound. The return
convention matches irq_domain_create_linear() (NULL on failure).

Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Radu Rendec <radu@rendec.net>
Link: https://patch.msgid.link/20261104073759.386777-10-Zhipeng.wang_1@oss.nxp.com
---
 include/linux/irqdomain.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 3ba75a4..d8caafc 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -457,6 +457,36 @@ static inline struct irq_domain *irq_domain_create_linear(struct fwnode_handle *
 	return IS_ERR(d) ? NULL : d;
 }
 
+/**
+ * devm_irq_domain_create_linear - Allocate and register a linear revmap
+ *				   irq_domain tied to the device lifetime.
+ * @dev:	Device that owns the domain. The domain is removed via devres
+ *		when the device is unbound.
+ * @fwnode:	pointer to interrupt controller's FW node.
+ * @size:	Number of interrupts in the domain.
+ * @ops:	map/unmap domain callbacks
+ * @host_data:	Controller private data pointer
+ *
+ * Returns: Newly created irq_domain, or NULL on failure.
+ */
+static inline struct irq_domain *devm_irq_domain_create_linear(struct device *dev,
+							       struct fwnode_handle *fwnode,
+							       unsigned int size,
+							       const struct irq_domain_ops *ops,
+							       void *host_data)
+{
+	const struct irq_domain_info info = {
+		.fwnode		= fwnode,
+		.size		= size,
+		.hwirq_max	= size,
+		.ops		= ops,
+		.host_data	= host_data,
+	};
+	struct irq_domain *d = devm_irq_domain_instantiate(dev, &info);
+
+	return IS_ERR(d) ? NULL : d;
+}
+
 static inline struct irq_domain *irq_domain_create_tree(struct fwnode_handle *fwnode,
 							const struct irq_domain_ops *ops,
 							void *host_data)