[PATCH 5/5] irq: generic-chip: provide devm_irq_setup_generic_chip()

From: Bartosz Golaszewski
Date: Wed May 31 2017 - 12:07:30 EST


Provide a resource managed variant of irq_setup_generic_chip().

Signed-off-by: Bartosz Golaszewski <brgl@xxxxxxxx>
---
Documentation/driver-model/devres.txt | 1 +
include/linux/irq.h | 3 ++
kernel/irq/devres.c | 52 +++++++++++++++++++++++++++++++++++
3 files changed, 56 insertions(+)

diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index d473be8..6a6618f 100644
--- 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 c6e70e9..4006ba1 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -956,6 +956,9 @@ 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 21ee0ae..194c506 100644
--- 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 */
--
2.9.3