[PATCH v1 1/4] regmap-irq: Provide IRQ resource request and release callbacks

[Andy Shevchenko]

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.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/base/regmap/regmap-irq.c | 22 ++++++++++++++++++++++
 include/linux/regmap.h           |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 07234d415b51..99b55b1053ee 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -296,6 +296,26 @@ 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,
@@ -303,6 +323,8 @@ static const struct irq_chip regmap_irq_chip = {
 	.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,
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index df44cb30f53b..370baa19db87 100644
--- a/include/linux/regmap.h
+++ b/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;
 };
 
-- 
2.50.1