[PATCH v3 2/7] gpio: regmap: add gpio_regmap_get_gpiochip() accessor

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

Expose an accessor function to retrieve the gpio_chip pointer from
a gpio_regmap instance.

This is needed by drivers that use gpio_regmap but also manage their
own irq_chip, where gpiochip_enable_irq()/gpiochip_disable_irq() must
be called with the gpio_chip pointer.

Add gpio_regmap_get_gpiochip() to allow drivers with complex custom IRQ
implementations.

Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
---
 drivers/gpio/gpio-regmap.c  | 6 ++++++
 include/linux/gpio/regmap.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
index 9ae4a41a2427..deb9eebb58de 100644
--- a/drivers/gpio/gpio-regmap.c
+++ b/drivers/gpio/gpio-regmap.c
@@ -230,6 +230,12 @@ void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)
 }
 EXPORT_SYMBOL_GPL(gpio_regmap_get_drvdata);
 
+struct gpio_chip *gpio_regmap_get_gpiochip(struct gpio_regmap *gpio)
+{
+	return &gpio->gpio_chip;
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_get_gpiochip);
+
 /**
  * gpio_regmap_register() - Register a generic regmap GPIO controller
  * @config: configuration for gpio_regmap
diff --git a/include/linux/gpio/regmap.h b/include/linux/gpio/regmap.h
index 12d154732ca9..e4a95f805a81 100644
--- a/include/linux/gpio/regmap.h
+++ b/include/linux/gpio/regmap.h
@@ -113,5 +113,6 @@ void gpio_regmap_unregister(struct gpio_regmap *gpio);
 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);
+struct gpio_chip *gpio_regmap_get_gpiochip(struct gpio_regmap *gpio);
 
 #endif /* _LINUX_GPIO_REGMAP_H */
-- 
2.34.1