[PATCH v6 2/8] gpio: regmap: Provide default IRQ resource request and release callbacks

[Yu-Chun Lin <eleanor.lin@realtek.com>]

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

When GPIO regmap based driver supplies its own IRQ domain, it might
still want to keep track of the IRQ requests and releases, in particular
to prevent a GPIO, which is used and locked as IRQ, to be requested
via standard ways. Provide default callbacks for such cases and keep
struct gpio_chip private to GPIO regmap implementation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
---
 drivers/gpio/gpio-regmap.c  | 12 ++++++++++++
 include/linux/gpio/regmap.h |  3 +++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
index 51b4d69b8740..535bd9deaa71 100644
--- a/drivers/gpio/gpio-regmap.c
+++ b/drivers/gpio/gpio-regmap.c
@@ -276,6 +276,18 @@ static int gpio_regmap_direction_output(struct gpio_chip *chip,
 	return gpio_regmap_set_direction(chip, offset, true);
 }
 
+int gpio_regmap_reqres_irq(struct gpio_regmap *gpio, unsigned int offset)
+{
+	return gpiochip_reqres_irq(&gpio->gpio_chip, offset);
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_reqres_irq);
+
+void gpio_regmap_relres_irq(struct gpio_regmap *gpio, unsigned int offset)
+{
+	gpiochip_relres_irq(&gpio->gpio_chip, offset);
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_relres_irq);
+
 void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)
 {
 	return gpio->driver_data;
diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h
index 06255756710d..e939709fde8d 100644
--- a/include/linux/gpio/regmap.h
+++ b/include/linux/gpio/regmap.h
@@ -121,4 +121,7 @@ struct gpio_regmap *devm_gpio_regmap_register(struct device *dev,
 					      const struct gpio_regmap_config *config);
 void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio);
 
+int gpio_regmap_reqres_irq(struct gpio_regmap *gpio, unsigned int offset);
+void gpio_regmap_relres_irq(struct gpio_regmap *gpio, unsigned int offset);
+
 #endif /* _LINUX_GPIO_REGMAP_H */
-- 
2.43.0