irqdomain: Add a resource managed version of irq_domain_instantiate()

Add a devres version of irq_domain_instantiate().

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240614173232.1184015-17-herve.codina@bootlin.com

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 5540b22a755c538f442ed72445d2f99213768645..8820317582c4aa9c4808cc3030f997802d35f237 100644 (file)
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -304,6 +304,8 @@ struct irq_domain_info {
 };
 
 struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info);
+struct irq_domain *devm_irq_domain_instantiate(struct device *dev,
+                                              const struct irq_domain_info *info);
 
 struct irq_domain *__irq_domain_add(struct fwnode_handle *fwnode, unsigned int size,
                                    irq_hw_number_t hwirq_max, int direct_max,

diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index f6e5515ee0774346c8bd8bcebc93f5b0e38f7230..b3e98668f4dd87e725626ad55f48a34d117e1c67 100644 (file)
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/irqdomain.h>
 #include <linux/device.h>
 #include <linux/gfp.h>
 #include <linux/irq.h>
@@ -282,3 +283,43 @@ int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
 }
 EXPORT_SYMBOL_GPL(devm_irq_setup_generic_chip);
 #endif /* CONFIG_GENERIC_IRQ_CHIP */
+
+#ifdef CONFIG_IRQ_DOMAIN
+static void devm_irq_domain_remove(struct device *dev, void *res)
+{
+       struct irq_domain **domain = res;
+
+       irq_domain_remove(*domain);
+}
+
+/**
+ * devm_irq_domain_instantiate() - Instantiate a new irq domain data for a
+ *                                 managed device.
+ * @dev:       Device to instantiate the domain for
+ * @info:      Domain information pointer pointing to the information for this
+ *             domain
+ *
+ * Return: A pointer to the instantiated irq domain or an ERR_PTR value.
+ */
+struct irq_domain *devm_irq_domain_instantiate(struct device *dev,
+                                              const struct irq_domain_info *info)
+{
+       struct irq_domain *domain;
+       struct irq_domain **dr;
+
+       dr = devres_alloc(devm_irq_domain_remove, sizeof(*dr), GFP_KERNEL);
+       if (!dr)
+               return ERR_PTR(-ENOMEM);
+
+       domain = irq_domain_instantiate(info);
+       if (!IS_ERR(domain)) {
+               *dr = domain;
+               devres_add(dev, dr);
+       } else {
+               devres_free(dr);
+       }
+
+       return domain;
+}
+EXPORT_SYMBOL_GPL(devm_irq_domain_instantiate);
+#endif /* CONFIG_IRQ_DOMAIN */