regmap: store irq_chip inside regmap_irq_chip_data

This will allow later patches to adjust portions of the irq_chip
individually for each regmap_irq_chip that is created.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/base/regmap/regmap-irq.c

@@ -22,6 +22,7 @@
 
 struct regmap_irq_chip_data {
 	struct mutex lock;
+	struct irq_chip irq_chip;
 
 	struct regmap *map;
 	const struct regmap_irq_chip *chip;
@@ -129,7 +130,7 @@ static int regmap_irq_set_wake(struct irq_data *data, unsigned int on)
 	return 0;
 }
 
-static struct irq_chip regmap_irq_chip = {
+static const struct irq_chip regmap_irq_chip = {
 	.name			= "regmap",
 	.irq_bus_lock		= regmap_irq_lock,
 	.irq_bus_sync_unlock	= regmap_irq_sync_unlock,
@@ -197,7 +198,7 @@ static int regmap_irq_map(struct irq_domain *h, unsigned int virq,
 	struct regmap_irq_chip_data *data = h->host_data;
 
 	irq_set_chip_data(virq, data);
-	irq_set_chip_and_handler(virq, &regmap_irq_chip, handle_edge_irq);
+	irq_set_chip_and_handler(virq, &data->irq_chip, handle_edge_irq);
 	irq_set_nested_thread(virq, 1);
 
 	/* ARM needs us to explicitly flag the IRQ as valid
@@ -285,6 +286,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 			goto err_alloc;
 	}
 
+	d->irq_chip = regmap_irq_chip;
 	d->irq = irq;
 	d->map = map;
 	d->chip = chip;