irq/generic-chip: Provide devm_irq_setup_generic_chip()

Provide a resource managed variant of irq_setup_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/1496246820-13250-6-git-send-email-brgl@bgdev.pl

diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index d473be8c878172ea665e84890067a57a90147a6c..6a6618f34440485ec3f0f706f372a8c4ec833145 100644 (file)
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -312,6 +312,7 @@ IRQ
   devm_irq_alloc_desc_from()
   devm_irq_alloc_descs_from()
   devm_irq_alloc_generic_chip()
+  devm_irq_setup_generic_chip()
 
 LED
   devm_led_classdev_register()

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 64ae54673e080f7f6d68607781679996b7bb1d61..d996314b65221e4710cf960b7ca1652793d222ec 100644 (file)
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -962,6 +962,9 @@ 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);
+int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
+                               u32 msk, enum irq_gc_flags flags,
+                               unsigned int clr, unsigned int set);
 
 struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);
 

diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 21ee0aebccfb3fe1c7f8975caa2b9d50a2993050..194c506d9d20097d5d94ba09bd7e00d50bc5e0c7 100644 (file)
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -231,4 +231,56 @@ devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
        return gc;
 }
 EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip);
+
+struct irq_generic_chip_devres {
+       struct irq_chip_generic *gc;
+       u32 msk;
+       unsigned int clr;
+       unsigned int set;
+};
+
+static void devm_irq_remove_generic_chip(struct device *dev, void *res)
+{
+       struct irq_generic_chip_devres *this = res;
+
+       irq_remove_generic_chip(this->gc, this->msk, this->clr, this->set);
+}
+
+/**
+ * devm_irq_setup_generic_chip - Setup a range of interrupts with a generic
+ *                               chip for a managed device
+ *
+ * @dev:       Device to setup the generic chip for
+ * @gc:                Generic irq chip holding all data
+ * @msk:       Bitmask holding the irqs to initialize relative to gc->irq_base
+ * @flags:     Flags for initialization
+ * @clr:       IRQ_* bits to clear
+ * @set:       IRQ_* bits to set
+ *
+ * Set up max. 32 interrupts starting from gc->irq_base. Note, this
+ * initializes all interrupts to the primary irq_chip_type and its
+ * associated handler.
+ */
+int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
+                               u32 msk, enum irq_gc_flags flags,
+                               unsigned int clr, unsigned int set)
+{
+       struct irq_generic_chip_devres *dr;
+
+       dr = devres_alloc(devm_irq_remove_generic_chip,
+                         sizeof(*dr), GFP_KERNEL);
+       if (!dr)
+               return -ENOMEM;
+
+       irq_setup_generic_chip(gc, msk, flags, clr, set);
+
+       dr->gc = gc;
+       dr->msk = msk;
+       dr->clr = clr;
+       dr->set = set;
+       devres_add(dev, dr);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(devm_irq_setup_generic_chip);
 #endif /* CONFIG_GENERIC_IRQ_CHIP */