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authorBartosz Golaszewski <brgl@bgdev.pl>2017-05-31 18:06:59 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-21 15:53:11 +0200
commit1c3e36309fe2e94b8a889fa32cb5c871434f8ed6 (patch)
treee51e8f0c8b636fdbb88aa95f3371a151c4e0baf3 /kernel/irq/devres.c
parentf160203986a6ad23ab8077c4a25b260fe55d6e26 (diff)
downloadlinux-stericsson-1c3e36309fe2e94b8a889fa32cb5c871434f8ed6.tar.gz
irq/generic-chip: Provide devm_irq_alloc_generic_chip()
Provide a resource managed variant of irq_alloc_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Link: http://lkml.kernel.org/r/1496246820-13250-5-git-send-email-brgl@bgdev.pl
Diffstat (limited to 'kernel/irq/devres.c')
-rw-r--r--kernel/irq/devres.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 1613bfd48365..21ee0aebccfb 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -4,6 +4,8 @@
#include <linux/gfp.h>
#include <linux/irq.h>
+#include "internals.h"
+
/*
* Device resource management aware IRQ request/free implementation.
*/
@@ -198,3 +200,35 @@ int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from,
return base;
}
EXPORT_SYMBOL_GPL(__devm_irq_alloc_descs);
+
+#ifdef CONFIG_GENERIC_IRQ_CHIP
+/**
+ * devm_irq_alloc_generic_chip - Allocate and initialize a generic chip
+ * for a managed device
+ * @dev: Device to allocate the generic chip for
+ * @name: Name of the irq chip
+ * @num_ct: Number of irq_chip_type instances associated with this
+ * @irq_base: Interrupt base nr for this chip
+ * @reg_base: Register base address (virtual)
+ * @handler: Default flow handler associated with this chip
+ *
+ * Returns an initialized irq_chip_generic structure. The chip defaults
+ * to the primary (index 0) irq_chip_type and @handler
+ */
+struct irq_chip_generic *
+devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
+ unsigned int irq_base, void __iomem *reg_base,
+ irq_flow_handler_t handler)
+{
+ struct irq_chip_generic *gc;
+ unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
+
+ gc = devm_kzalloc(dev, sz, GFP_KERNEL);
+ if (gc)
+ irq_init_generic_chip(gc, name, num_ct,
+ irq_base, reg_base, handler);
+
+ return gc;
+}
+EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip);
+#endif /* CONFIG_GENERIC_IRQ_CHIP */