linux-kernel - [tip: irq/core] irqdomain: Add a resource managed version of irq_domain

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Date: Mon, 17 Jun 2024 13:51:09 -0000
From: "tip-bot2 for Herve Codina" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Herve Codina <herve.codina@...tlin.com>,
 Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
 linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] irqdomain: Add a resource managed version of
 irq_domain_instantiate()

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

Commit-ID:     0c5b29a6dc7b463b6072da8cef43800008728ff3
Gitweb:        https://git.kernel.org/tip/0c5b29a6dc7b463b6072da8cef43800008728ff3
Author:        Herve Codina <herve.codina@...tlin.com>
AuthorDate:    Fri, 14 Jun 2024 19:32:17 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 17 Jun 2024 15:48:14 +02:00

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

---
 include/linux/irqdomain.h |  2 ++-
 kernel/irq/devres.c       | 41 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 43 insertions(+)

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 5540b22..8820317 100644
--- 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 f6e5515..b3e9866 100644
--- 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 */