regmap-irq: Provide IRQ resource request and release callbacks

The users which rely on regmap IRQ to create the IRQ chip may also
want to have an additional tracking of the IRQ requests and releases.
Provide a callback for them.

Author: broonie

drivers/base/regmap/regmap-irq.c

@@ -296,13 +296,35 @@ static int regmap_irq_set_wake(struct irq_data *data, unsigned int on)
 	return 0;
 }
 
+static int regmap_irq_reqres(struct irq_data *data)
+{
+	struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
+	irq_hw_number_t hwirq = irqd_to_hwirq(data);
+
+	if (d->chip->irq_reqres)
+		return d->chip->irq_reqres(d->chip->irq_drv_data, hwirq);
+
+	return 0;
+}
+
+static void regmap_irq_relres(struct irq_data *data)
+{
+	struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
+	irq_hw_number_t hwirq = irqd_to_hwirq(data);
+
+	if (d->chip->irq_relres)
+		d->chip->irq_relres(d->chip->irq_drv_data, hwirq);
+}
+
 static const struct irq_chip regmap_irq_chip = {
 	.irq_bus_lock		= regmap_irq_lock,
 	.irq_bus_sync_unlock	= regmap_irq_sync_unlock,
 	.irq_disable		= regmap_irq_disable,
 	.irq_enable		= regmap_irq_enable,
 	.irq_set_type		= regmap_irq_set_type,
 	.irq_set_wake		= regmap_irq_set_wake,
+	.irq_request_resources  = regmap_irq_reqres,
+	.irq_release_resources  = regmap_irq_relres,
 };
 
 static inline int read_sub_irq_data(struct regmap_irq_chip_data *data,

include/linux/regmap.h

@@ -1770,6 +1770,8 @@ struct regmap_irq_chip {
 			       void *irq_drv_data);
 	unsigned int (*get_irq_reg)(struct regmap_irq_chip_data *data,
 				    unsigned int base, int index);
+	int (*irq_reqres)(void *irq_drv_data, irq_hw_number_t hwirq);
+	void (*irq_relres)(void *irq_drv_data, irq_hw_number_t hwirq);
 	void *irq_drv_data;
 };