gpiolib: add devm_gpiod_get_array and devm_gpiod_put_array functions

Add device managed variants of gpiod_get_array() / gpiod_put_array()
functions for conveniently obtaining and disposing of an entire array
of GPIOs with one function call.

Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 33eb52fd0932..3a7c9ffd5ab9 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -83,7 +83,14 @@ struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
 struct gpio_desc *__must_check
 __devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
                               unsigned int index, enum gpiod_flags flags);
+struct gpio_descs *__must_check devm_gpiod_get_array(struct device *dev,
+                                                     const char *con_id,
+                                                     enum gpiod_flags flags);
+struct gpio_descs *__must_check
+devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
+                              enum gpiod_flags flags);
 void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
+void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs);
 
 int gpiod_get_direction(struct gpio_desc *desc);
 int gpiod_direction_input(struct gpio_desc *desc);
@@ -228,6 +235,20 @@ __devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
         return ERR_PTR(-ENOSYS);
 }
 
+static inline struct gpio_descs *__must_check
+devm_gpiod_get_array(struct device *dev, const char *con_id,
+                     enum gpiod_flags flags)
+{
+        return ERR_PTR(-ENOSYS);
+}
+
+static inline struct gpio_descs *__must_check
+devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
+                              enum gpiod_flags flags)
+{
+        return ERR_PTR(-ENOSYS);
+}
+
 static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
 {
         might_sleep();
@@ -236,6 +257,15 @@ static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
         WARN_ON(1);
 }
 
+static inline void devm_gpiod_put_array(struct device *dev,
+                                        struct gpio_descs *descs)
+{
+        might_sleep();
+
+        /* GPIO can never have been requested */
+        WARN_ON(1);
+}
+
 
 static inline int gpiod_get_direction(const struct gpio_desc *desc)
 {